Invacare M50, M61, M51 User Manual

Service Manual

Pronto® Series

™

M50
M51
M61

™

™

DEALER: Keep this manual. The
procedures in this manual MUST be
performed by a qualified technician.

For more information regarding

Invacare products, parts, and services,

please visit www.invacare.com

RECOMMENDED TOOLS

 WARNING

A QUALIFIED TECHNICIAN MUST PERFORM ALL PROCEDURES
IN THIS SERVICE MANUAL.

DEALERS AND QUALIFIED TECHNICIANS: DO NOT SERVICE OR
OPERATE THIS EQUIPMENT WITHOUT FIRST READING AND
UNDERSTANDING (1) THE OWNER’S OPERATOR AND
MAINTENANCE MANUAL, (2) THE SERVICE MANUAL (IF
APPLICABLE) AND (3) THE SEATING SYSTEM’S MANUAL (IF
APPLICABLE). IF YOU ARE UNABLE TO UNDERSTAND THE
WARNINGS, CAUTIONS AND INSTRUCTIONS, CONTACT
INVACARE TECHNICAL SUPPORT BEFORE ATTEMPTING TO
SERVICE OR OPERATE THIS EQUIPMENT. OTHERWISE, INJURY
OR DAMAGE MAY RESULT.

RECOMMENDED TOOLS

The following tools are recommended for servicing this wheelchair:

• Invacare Power Mobility Field Service Kit - p/n 1125222

• 5mm ball head 10-inch t-handle allen wrench

• Flat tip screwdriver

• ½-inch deep socket and 3/8-inch ratchet

• Small and Medium Phillips® screwdriver

• Needle nose pliers

• Wire cutters

• Tie-wrap assortment

• Dead blow hammer

• ¼-inch to ½-inch wrenches

REFERENCE DOCUMENTS

DOCUMENT PART NUMBER

M50/51/61 Owner’s Manual 1125085

MK5™NX™Electronics Manual 1110532

Quad-Link Instruction Sheet (for assemblies after 4/6/06) 1134844

MK6i™Field Reference Guide 1141471

MK6i Service Manual 1143203

NOTE: Updated versions of this manual are available on www.invacare.com.

Pronto® Series 2 Part No. 1125075

TABLE OF CONTENTS

TABLE OF CONTENTS

RECOMMENDED TOOLS .................................................................... 2

REFERENCE DOCUMENTS ................................................................. 2

SPECIAL NOTES ................................................................................ 8

LABEL LOCATION .......................................................................... 10

TYPICAL PRODUCT PARAMETERS .................................................. 11

SECTION 1—GENERAL GUIDELINES ................................................. 13

Controller Settings/Repair or Service .................................................................................................13

Operation Information............................................................................................................................13

Tire Pressure .............................................................................................................................................14

Batteries......................................................................................................................................................14

Charging Batteries ...............................................................................................................................15

Grounding Instructions ...........................................................................................................................15

Rain Test.....................................................................................................................................................16

Weight Training ........................................................................................................................................16

Weight Limitation.....................................................................................................................................16

SECTION 2—EMI INFORMATION ..................................................... 17

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING .................... 19

Safety Inspection Checklists...................................................................................................................19

All Wheelchairs ....................................................................................................................................19

Additional Requirements for M61 Wheelchairs...........................................................................20

Troubleshooting........................................................................................................................................20

Wheels ...................................................................................................................................................20

About Joystick Diagnostics ..........................................................................................................20

SPJ+ Information Gauge Display Diagnostics ...........................................................................21

SPJ Information Gauge Display Diagnostics ...................................................................................22

Diagnostic Codes.................................................................................................................................23

Motor/Gearbox/Brake ........................................................................................................................25

Battery ....................................................................................................................................................27

Battery Charger....................................................................................................................................28

M61 Only ...............................................................................................................................................29

Checking Battery Charge Level.............................................................................................................29

Field Load Test..........................................................................................................................................30

Motor Testing............................................................................................................................................31

SECTION 4—WHEELCHAIR OPERATION ........................................... 32

Turning the Power On/Off.....................................................................................................................32

M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................32

M50/M51 Wheelchairs Manufactured After 8/14/05 and all M61 Wheelchairs....................33

Using the Joystick to Drive the Wheelchair ......................................................................................33

Adjusting the Speed .................................................................................................................................35

M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................35

M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61 Wheelchairs...................35

Using the Horn..........................................................................................................................................36

M50 and M51 Wheelchairs Manufactured Before 8/15/05 ........................................................36

Part No. 1125075 3 Pronto® Series

TABLE OF CONTENTS

TABLE OF CONTENTS

M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61 Wheelchairs...................37

Elevating the Seat......................................................................................................................................37

SPJ™Joystick Switches and Indicators .................................................................................................39

On/Off Toggle Switch .........................................................................................................................39

Speed Control Knob ...........................................................................................................................39

Joystick....................................................................................................................................................39

Charger/Programming Input..............................................................................................................39

Information Gauge Display ................................................................................................................40

SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators .................................................................41

On/Off Button ......................................................................................................................................42

Speedometer.........................................................................................................................................42

Speed Control Buttons.......................................................................................................................42

Mode Button .........................................................................................................................................42

Joystick....................................................................................................................................................43

Charger/Programming Input..............................................................................................................43

Service Indicator...................................................................................................................................43

Information Gauge Display ................................................................................................................43

SECTION 5—ARMS ......................................................................... 44

Removing/Installing Van Seat Arm........................................................................................................44

Adjusting Van Seat Arm Width.............................................................................................................44

Adjusting Van Seat Arm Angle ..............................................................................................................45

Adjusting Van Seat Arm Height (Adjustable Height Arms Only)..................................................45

Replacing Van Seat Armrest Assembly................................................................................................46

Removing/Installing Flip Back Armrest ................................................................................................47

Adjusting the Flip Back Armrest Height..............................................................................................48

SECTION 6—VAN SEAT ................................................................... 49

Adjusting the Back Angle ........................................................................................................................49

Semi-Recline Back Angle ....................................................................................................................49

Fold Down Back Angle .......................................................................................................................49

Adjusting the Headrest (Semi-Recline Only) .....................................................................................50

Removing/Installing the Seat Assembly................................................................................................50

Removing ...............................................................................................................................................50

Installing..................................................................................................................................................50

Adjusting Seat Depth ...............................................................................................................................51

Adjusting the Seat Height .......................................................................................................................53

M50/M51 Wheelchairs........................................................................................................................53

M61 Wheelchairs .................................................................................................................................54

Adjusting Seat Position on Seat Base ...................................................................................................56

Replacing the Seat Positioning Strap ....................................................................................................58

SECTION 7—ASBA SEAT ................................................................. 59

Removing/Installing the Seat Assembly................................................................................................59

Removing ..........................................................................................................................................59

Installing ............................................................................................................................................59

Adjusting the Seat Height .......................................................................................................................60

M50/51 Wheelchairs Only.................................................................................................................60

Pronto® Series 4 Part No. 1125075

TABLE OF CONTENTS

TABLE OF CONTENTS

M61 Wheelchairs .................................................................................................................................62

Removing/Installing the Seat Pan...........................................................................................................63

Adjusting the Seat Width........................................................................................................................64

Removing/Installing the Seat Frame......................................................................................................64

Removing ...............................................................................................................................................64

Installing..................................................................................................................................................64

Adjusting the Seat Position.....................................................................................................................65

Removing/Installing the Seat Positioning Strap ..................................................................................66

Removing/Installing the Back Upholstery............................................................................................67

Removing/Installing/Changing the Back Cane Height.......................................................................67

Removing ..........................................................................................................................................67

Installing ............................................................................................................................................68

Adjusting the Back Angle ........................................................................................................................71

SECTION 8—FRONT RIGGINGS/FOOTBOARD .................................... 73

Installing/Removing Front Riggings .......................................................................................................73

Installing..................................................................................................................................................73

Removing ...............................................................................................................................................74

Adjusting Footrest Height ......................................................................................................................74

Model PHWH93 Front Riggings .......................................................................................................74

Model PH904A and PHAL4A Front Riggings ................................................................................75

Replacing Heel Loops ..............................................................................................................................75

Raising/Lowering Elevating Front Riggings ..........................................................................................76

Adjusting/Replacing Telescoping Front Rigging Supports................................................................76

Van Seats................................................................................................................................................76

ASBA Seat..............................................................................................................................................77

Removing/Installing the Footboard Assembly....................................................................................78

Removing ...............................................................................................................................................78

Installing..................................................................................................................................................79

Adjusting the Footboard Assembly ......................................................................................................79

Angle .......................................................................................................................................................79

Depth......................................................................................................................................................80

SECTION 9—WHEELS ....................................................................... 81

Replacing the Front/Rear Casters.........................................................................................................81

Adjusting Caster Assembly.....................................................................................................................82

Removing/Installing the Front/Rear Caster Assemblies...................................................................83

Removing ...............................................................................................................................................83

Installing..................................................................................................................................................83

Removing/Installing the Front Headtube Assembly..........................................................................83

Removing/Installing the Drive Wheel ..................................................................................................84

Removing the Drive Wheel...............................................................................................................84

Installing the Drive Wheel .................................................................................................................84

Replacing the 2-Piece Wheel Rim and/or the Foam Filled or Pneumatic Tires.........................85

SECTION 10—SHROUDS AND FRAME .............................................. 87

Removing/Installing the Top Shroud ....................................................................................................87

Removing ...............................................................................................................................................87

Part No. 1125075 5 Pronto® Series

TABLE OF CONTENTS

TABLE OF CONTENTS

Installing..................................................................................................................................................87

Removing/Installing the Side Shrouds ..................................................................................................88

Removing ...............................................................................................................................................88

Installing..................................................................................................................................................88

Removing/Installing the Front Shroud .................................................................................................89

Removing ...............................................................................................................................................89

Installing..................................................................................................................................................89

Removing/Installing the Inner Shrouds ................................................................................................90

Removing ...............................................................................................................................................90

Installing..................................................................................................................................................90

Removing/Installing the Pivot Tube ......................................................................................................91

Removing ...............................................................................................................................................91

Installing..................................................................................................................................................92

Removing/Installing the SureStep Spring .............................................................................................93

Removing ...............................................................................................................................................93

Installing..................................................................................................................................................93

Removing/Installing the Walking Beam................................................................................................93

Removing ...............................................................................................................................................93

Installing..................................................................................................................................................93

Removing/Installing the Elevate Actuator ...........................................................................................94

Removing ...............................................................................................................................................94

Installing..................................................................................................................................................95

Removing/Installing the Actuator Switch Sensor ..............................................................................97

Removing ...............................................................................................................................................97

Installing..................................................................................................................................................97

SECTION 11—BATTERIES ................................................................ 98

Warnings For Handling and Replacing Batteries ...............................................................................98

Using the Proper Batteries.....................................................................................................................99

Removing/Installing Batteries from/into Battery Tray......................................................................99

Removing ............................................................................................................................................ 100

Installing............................................................................................................................................... 100

Connecting/Disconnecting Battery Cables...................................................................................... 101

Connecting Battery Cables............................................................................................................. 101

Disconnecting Battery Cables........................................................................................................ 104

Charging Batteries................................................................................................................................. 104

Battery Charger Operation................................................................................................................. 105

On-Board Battery Charger............................................................................................................. 106

Charging Using An Independent Charger Plugged Into The Joystick ................................... 107

Replacing the On-Board Battery Charger Fuse.............................................................................. 108

Replacing the On-Board Battery Charger ....................................................................................... 109

SECTION 12—MOTORS .................................................................. 112

Removing/Installing the Motor ........................................................................................................... 112

Engaging/Disengaging Motor Release Lever .................................................................................... 114

Removing/Installing the Motor Release Lever ................................................................................ 115

Replacing Motor Brushes..................................................................................................................... 116

Electro-Mechanical Parking Brake Testing....................................................................................... 118

Pronto® Series 6 Part No. 1125075

TABLE OF CONTENTS

TABLE OF CONTENTS

SECTION 13—ELECTRONICS .......................................................... 120

Removing/Installing the Joystick ......................................................................................................... 120

Removing ............................................................................................................................................ 120

Installing............................................................................................................................................... 120

Repositioning the Joystick Mounting Bracket ................................................................................. 121

Van Seat............................................................................................................................................... 121

ASBA Seat........................................................................................................................................... 122

Disconnecting/Connecting the Joystick............................................................................................ 123

Disconnecting .................................................................................................................................... 123

Connecting ......................................................................................................................................... 123

Adjusting the Quad-Link Retractable Mount .................................................................................. 124

Adjusting Lock/Release Tension.................................................................................................... 124

Replacing the Controller ..................................................................................................................... 125

Wire Routing.......................................................................................................................................... 127

SECTION 14—ACCESSORIES .......................................................... 128

Installing/Removing the Crutch/Cane Holder................................................................................. 128

Installing............................................................................................................................................... 128

Installing/Removing the Oxygen Holder .......................................................................................... 129

Installing/Removing/Using the Walker Holder ...............................................................................130

Installing/Removing the Walker Holder ...................................................................................... 130

Using the Walker Holder................................................................................................................ 130

LIMITED WARRANTY ................................................................... 131

Part No. 1125075 7 Pronto® Series

SPECIAL NOTES

SPECIAL NOTES

Signal words are used in this manual and apply to hazards or unsafe practices which
could result in personal injury or property damage. Refer to the table below for
definitions of the signal words.

SIGNAL WORD MEANING

DANGER

WARNING

CAUTION

Danger indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.

Warning indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.

Caution indicates a potentially hazardous situation which, if
not avoided, may result in property damage.

NOTICE

THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO
CHANGE WITHOUT NOTICE.

WHEELCHAIR USER

As a manufacturer of wheelchairs, Invacare endeavors to supply a wide variety of
wheelchairs to meet many needs of the end user. However, final selection of the
type of wheelchair to be used by an individual rests solely with the user and his/her
healthcare professional capable of making such a selection.

WHEELCHAIR TIE-DOWN RESTRAINTS AND SEAT RESTRAINTS

Wheelchair users should not be transported in vehicles of any kind while in
wheelchairs. As of this date, the Department of Transportation has not approved
any tie-down systems for transportation of a user while in a wheelchair, in a moving
vehicle of any type.

It is Invacare’s position that users of wheelchairs should be transferred into
appropriate seating in vehicles for transportation and use be made of the restraints
made available by the auto industry. Invacare cannot and does not recommend any
wheelchair transportation systems.

 WARNING

ALWAYS wear your seat positioning strap. The seat positioning strap is a
positioning belt only. It is not designed for use as a safety device withstanding high
stress loads such as auto or aircraft safety belts. If signs of wear appear, the belt
MUST be replaced IMMEDIATELY.

Invacare products are specifically designed and manufactured for use in conjunction
with Invacare accessories. Accessories designed by other manufacturers have not
been tested by Invacare and are not recommended for use with Invacare products.

Pronto® Series 8 Part No. 1125075

SPECIAL NOTES

 WARNING CONTINUED

The drive behavior initially experienced by the user may be different from other
chairs previously used. This power wheelchair has Invacare’s SureStep® technology,
a feature that provides the chair with optimum traction and stability when driving
forward over transitions and thresholds of up to 2-inches.

The following warnings apply specifically to the SureStep Feature.

• DO NOT use on inclines greater than 9°.

• DO NOT use on inclines with wet, slippery, icy or oily surfaces. This may include
certain painted or otherwise treated wood surfaces.

• DO NOT traverse down ramps at high speed. Doing so will reduce traction and
increase stopping distance.

• The end user’s weight can materially affect traction on sloped surfaces. Great
care should be taken when traversing such slopes.

To determine and establish your particular safety limits, practice use of this product
on various sloping surfaces in the presence of a qualified healthcare provider before
attempting active use of this wheelchair. Other general warnings listed within this
document also apply.

Wheelchairs should be examined during maintenance for signs of corrosion (water
exposure, incontinence, etc.). Electrical components damaged by corrosion should
be replaced IMMEDIATELY.

Wheelchairs that are used by incontinent users and/or are frequently exposed to
water may require replacement of electrical components more frequently.

Part No. 1125075 9 Pronto® Series

LABEL LOCATION

LABEL LOCATION

The serial number label is located inside of the front frame. The top shroud and front
battery need to be removed to view the label.

M50/M51 Wheelchairs

M61 Wheelchairs

Pronto® Series 10 Part No. 1125075

TYPICAL PRODUCT PARAMETERS

TYPICAL PRODUCT PARAMETERS

MEDIUM

BACK

SEMI-RECLINE

BACK

OFFICE STYLE,

SEMI-RECLINE

BACK

SEAT WIDTH RANGE: 18 inches 16

inches

SEAT DEPTH: 16 - 18

inches

BACK HEIGHT: 16½ inches 19 inches 23½ inches

BACK ANGLE RANGE: 95° to 100°

in 5°

increments

UPHOLSTERY: Light Grey

Vinyl

SEAT-TO-FLOOR

WITH FOOTBOARD
(M50/M51):

WITH FRONT RIGGINGS
(M50/M51):

16 - 18 inches 18 - 20

Light Grey Vinyl, Grey

20 to 24 inches

22 to 24 inches

18

inches

90 to 114° 90 to 115° 80° to 100°

Cloth, Tan Vinyl

20

inches

inches

18 inches 16 - 20 inches

16 - 18 inches 16 - 20 inches

(w/ headrest)

18¾ inches

(w/o headrest)

Charcoal Grey Vinyl Black Nylon

19 to 23 inches

19-23 inches

ASBA

16 - 20 inches

in 5° increments

Back with Seat

Pan

17-21 inches

19-21 inches

WITH ELEVATING SEAT
(M61):

OVERALL WIDTH: 24 inches (Without Joystick)

OVERALL HEIGHT: 35 to 43¾ inches 41½ inches

OVERALL LENGTH: 34 inches (With Footboard Folded)

DRIVE WHEELS/
TIRES: 10 x 3-inch (Flat Free inserts)

CASTER: 6 x 2-inch Front/Rear w/Precision Sealed Bearings

FOOTRESTS/
LEGRESTS:

*WEIGHT

W/O BATTERIES:
W/BATTERIES (U1):

SHIPPING

BASE W/O BATTERIES:
BASE WITH BATTERIES:
MEDIUM BACK:
SEMI-RECLINE:
OFFICE STYLE:
ASBA (20 X 20 X 20):

21-23 inches + up to 5 inches of Elevate

39½ inches (With Footboard Extended)

Flip Up, Depth and Height Adjustable, Footboard,

Swingaway Front Rigging, Elevating Legrest

145 to 170 lbs
192 to 217 lbs

107 lbs
154 lbs

40 lbs
64 lbs
44 lbs
48 lbs

19 to 21 inches + up

to 5 inches of

Elevate

+ up to 5 inches

17 to 19 inches

of Elevate

Part No. 1125075 11 Pronto® Series

TYPICAL PRODUCT PARAMETERS

MEDIUM

BACK

SEMI-RECLINE

BACK

OFFICE STYLE,

SEMI-RECLINE

ASBA

BACK

ARMRESTS: Adjustable Width, Angle, Heights and Depth

BATTERIES: U1 - Quantity 2

WEIGHT LIMITATION: 300 lbs

PERFORMANCE

SPEED:
TURNING RADIUS:
**RANGE (VARIABLE):

0 to 4.3 m.p.h.

19½ inches

up to 12 miles

*NOTE: Includes seating systems and accessories.

**NOTE: Values for range are calculated for maximum chair weight rating using largest batteries
applicable (U1), per test procedures described in ANSI/RESNA WC/VOL2-1998 Section 4 and
meet federal reimbursement requirements for this product. While considered typical, they are
derived based on certain ideal conditions. Variances in battery condition, user weight, usage
pattern or overall terrain conditions will result in actual values for range that differ from these
stated values. Users should become accustomed to how their unique conditions impact their
individual results. Users should become familiar with the battery discharge indicator on the
joystick to determine the range of their wheelchair. Refer to Battery Charger Operation on page 105
for more information about the battery discharge indicator.

Pronto® Series 12 Part No. 1125075

SECTION 1—GENERAL GUIDELINES

SECTION 1—GENERAL GUIDELINES

 WARNING

SECTION 1 - GENERAL GUIDELINES contains important information for the safe
operation and use of this product. DO NOT use this product or any available
optional equipment without first completely reading and understanding these
instructions and any additional instructional material such as Owner’s Manuals,
Service Manuals or Instruction Sheets supplied with this product or optional
equipment. If you are unable to understand the Warnings, Cautions or Instructions,
contact a healthcare professional, dealer or technical personnel before attempting
to use this equipment - otherwise, injury or damage may occur.

Controller Settings/Repair or Service

Set-up of the Electronic Control Unit is to be performed only by a qualified technician.
The final adjustments of the controller may affect other activities of the wheelchair.
Damage to the equipment could occur if improperly set-up or adjusted.

Wheelchairs should be examined during maintenance for signs of corrosion (water
exposure, incontinence, etc.). Electrical components damaged by corrosion should be
replaced IMMEDIATELY.

Wheelchairs that are used by incontinent users and/or are frequently exposed to water
may require replacement of electrical components more frequently.

Operation Information

Performance adjustments should only be made by professionals of the healthcare field or
persons fully conversant with this process and the driver's capabilities. Incorrect settings
could cause injury to the driver, bystanders, damage to the chair and to surrounding
property.

After the wheelchair has been set-up, check to make sure that the wheelchair performs to
the specifications entered during the set-up procedure. If the wheelchair does not
perform to specifications, turn the wheelchair Off IMMEDIATELY and reenter set-up
specifications. Repeat this procedure until the wheelchair performs to specifications.

ALWAYS shift your weight in the direction you are turning. DO NOT shift your weight in
the opposite direction of the turn. Shifting your weight in the opposite direction of the
turn may cause the inside drive wheel to lose traction and the wheelchair to tip over.

DO NOT shift your weight or sitting position toward the direction you are reaching as the
wheelchair may tip over.

DO NOT engage or disengage the motor release levers until the power is in the Off
position.

DO NOT operate on roads, streets or highways.

Part No. 1125075 13 Pronto® Series

SECTION 1—GENERAL GUIDELINES

DO NOT climb, go up or down ramps or traverse slopes greater than 9°.

DO NOT attempt to move up or down an incline with a water, ice or oil film.

DO NOT attempt to drive over curbs or obstacles. Doing so may cause your wheelchair
to turn over and cause bodily harm or damage to the chair.

DO NOT leave the power button in the On position when entering or exiting your
wheelchair.

DO NOT stand on the frame of the wheelchair.

DO NOT stand on the flip-up footboard, otherwise damage may occur. When getting in
or out of the wheelchair, make sure that the flip-up footboard is in the upward position.

ALWAYS wear your seat positioning strap. The seat positioning strap is a positioning belt
only. It is not designed for use as a safety device withstanding high stress loads such as
auto or aircraft safety belts. If signs of wear appear, belt MUST be replaced
IMMEDIATELY.

Before performing any maintenance, adjustment or service verify that On/Off switch on
the joystick is in the Off position.

Avoid storing or using the wheelchair near open flame or combustible products. Serious
injury or damage to property may result.

ALWAYS keep hands and fingers clear of moving parts to avoid injury.

NEVER leave an unoccupied wheelchair on an incline.

DO NOT attempt to lift the wheelchair by any removable (detachable) parts. Lifting by
means of any removable (detachable) parts of the wheelchair may result in injury to the
user or damage to the wheelchair.

Make sure the detent balls of the quick-release pin are fully released beyond the outer
edge of the tube before operating the wheelchair. Otherwise, injury and/or damage may
result.

Keep detent balls clean.

Tire Pressure

DO NOT release wheelchair from service unless it has the proper tire pressure (P.S.I.). DO
NOT overinflate the tires. Failure to follow these recommendations may cause the tire to
explode and cause bodily harm. The recommended tire pressure is listed on the side wall
of the tire.

Batteries

The warranty and performance specifications contained in this manual are based on the
use of deep cycle gel cell or sealed lead acid batteries. Invacare strongly recommends their
use as the power source for this unit.

Pronto® Series 14 Part No. 1125075

SECTION 1—GENERAL GUIDELINES

Carefully read battery/battery charger information prior to installing, servicing or
operating your wheelchair.

Charging Batteries

 DANGER

When using an extension cord, use only a three wire extension cord having at least
16 AWG (American Wire Gauge) wire and the same or higher electrical rating as
the device being connected. Use of improper extension cord could result in risk of
fire and electric shock. Three prong to two prong adapters should not be used. Use
of three prong adapters can result in improper grounding and present a shock
hazard to the user.

NEVER attempt to recharge the batteries by attaching cables directly to the battery
terminals.

DO NOT attempt to recharge the batteries and operate the wheelchair at the same time.

DO NOT operate wheelchair with extension cord attached to the AC cable.

DO NOT attempt to recharge the batteries when the wheelchair has been exposed to any
type of moisture.

DO NOT attempt to recharge the batteries when the wheelchair is outside.

DO NOT sit in the wheelchair while charging the batteries.

DO NOT attempt to recharge batteries using both the on-board battery charger and an
independent battery charger (plugged into the joystick charger port) at the same time.
Doing so will reduce the life of the batteries.

Read and carefully follow the manufacturer’s instructions for each charger (supplied or
purchased). If charging instructions are not supplied, consult a qualified technician for
proper procedures.

Ensure the pins of the extension cord plug are the same number, size, and shape as those
on the charger.

DO NOT under any circumstances cut or remove the round grounding plug from the
charger AC cable plug or the extension cord plug.

Grounding Instructions

DO NOT, under any circumstances, cut or remove the round grounding prong from any
plug used with or for Invacare products. Some devices are equipped with three-prong
(grounding) plugs for protection against possible shock hazards and fire. Where a two­prong wall receptacle is encountered, it is the personal responsibility and obligation of the
customer to contact a qualified electrician and have the two-prong receptacle replaced with
a properly grounded three-prong wall receptacle in accordance with the National Electrical
Code. If you must use an extension cord, use only a three-wire extension cord having the
same or higher electrical rating as the device being connected. In addition, Invacare has
placed RED/ORANGE warning tags on some equipment. DO NOT remove these tags.

Part No. 1125075 15 Pronto® Series

SECTION 1—GENERAL GUIDELINES

Rain Test

Invacare has tested its power wheelchairs in accordance with ISO 7176 “Rain Test.” This
provides the end user or his/her assistant sufficient time to remove his/her power
wheelchair from a rain storm and retain wheelchair operation.

DO NOT leave power wheelchair in a rain storm of any kind.

DO NOT use power wheelchair in a shower.

DO NOT store power wheelchair in a damp area for an extended period of time.

Direct exposure to excessive rain or dampness may cause the chair to malfunction
electrically and mechanically, may cause the chair to prematurely rust and/or may
damage the upholstery.

Check to ensure that the RED and GREY battery terminal caps are secured in place,
joystick boot is not torn or cracked where water can enter and that all electrical
connections are secure at all times.

DO NOT use the wheelchair if the joystick boot is torn or cracked. If the joystick boot
becomes torn or cracked, replace IMMEDIATELY.

Weight Training

Invacare does not recommend the use of its wheelchairs as a weight training apparatus.
Invacare wheelchairs have not been designed or tested as a seat for any kind of weight
training. If occupant uses said wheelchair as a weight training apparatus, Invacare shall
not be liable for bodily injury and the warranty is void.

Weight Limitation

The M50, M51 and M61 wheelchairs with SureStep have a weight limitation of 300 lbs.

Pronto® Series 16 Part No. 1125075

SECTION 2—EMI INFORMATION

SECTION 2—EMI INFORMATION

 WARNING

CAUTION: IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION
REGARDING THE POSSIBLE EFFECTS OF ELECTROMAGNETIC
INTERFERENCE ON YOUR POWERED WHEELCHAIR.

Electromagnetic Interference (EMI) From Radio Wave Sources

Powered wheelchairs and motorized scooters (in this text, both will be referred to
as powered wheelchairs) may be susceptible to electromagnetic interference (EMI),
which is interfering electromagnetic energy (EM) emitted from sources such as
radio stations, TV stations, amateur radio (HAM) transmitters, two way radios, and
cellular phones. The interference (from radio wave sources) can cause the powered
wheelchair to release its brakes, move by itself, or move in unintended directions. It
can also permanently damage the powered wheelchair's control system. The
intensity of the interfering EM energy can be measured in volts per meter (V/m).
Each powered wheelchair can resist EMI up to a certain intensity. This is called its
"immunity level." The higher the immunity level, the greater the protection. At this
time, current technology is capable of achieving at least a 20 V/m immunity level,
which would provide useful protection from the more common sources of radiated
EMI.

There are a number of sources of relatively intense electromagnetic fields in the
everyday environment. Some of these sources are obvious and easy to avoid.
Others are not apparent and exposure is unavoidable. However, we believe that by
following the warnings listed below, your risk to EMI will be minimized.

The sources of radiated EMI can be broadly classified into three types:

1) Hand-held Portable transceivers (transmitters-receivers with the antenna

mounted directly on the transmitting unit. Examples include: citizens band (CB)
radios, "walkie talkie", security, fire and police transceivers, cellular telephones,
and other personal communication devices).

NOTE: Some cellular telephones and similar devices transmit signals while they are ON,
even when not being used.

2) Medium-range mobile transceivers, such as those used in police cars, fire trucks,

ambulances and taxis. These usually have the antenna mounted on the outside of
the vehicle; and

3) Long-range transmitters and transceivers, such as commercial broadcast

transmitters (radio and TV broadcast antenna towers) and amateur (HAM)
radios.

NOTE: Other types of hand-held devices, such as cordless phones, laptop computers,
AM/FM radios, TV sets, CD players, cassette players, and small appliances, such as elec­tric shavers and hair dryers, so far as we know, are not likely to cause EMI problems to
your powered wheelchair.

Part No. 1125075 17 Pronto® Series

SECTION 2—EMI INFORMATION

 WARNING

Powered Wheelchair Electromagnetic Interference (EMI)

Because EM energy rapidly becomes more intense as one moves closer to the
transmitting antenna (source), the EM fields from hand-held radio wave sources
(transceivers) are of special concern. It is possible to unintentionally bring high
levels of EM energy very close to the powered wheelchair's control system while
using these devices. This can affect powered wheelchair movement and braking.
Therefore, the warnings listed below are recommended to prevent possible
interference with the control system of the powered wheelchair.

Electromagnetic interference (EMI) from sources such as radio and TV stations,
amateur radio (HAM) transmitters, two-way radios, and cellular phones can affect
powered wheelchairs and motorized scooters.

FOLLOWING THE WARNINGS LISTED BELOW SHOULD REDUCE THE
CHANCE OF UNINTENDED BRAKE RELEASE OR POWERED WHEELCHAIR
MOVEMENT WHICH COULD RESULT IN SERIOUS INJURY.

1) Do not operate hand-held transceivers (transmitters receivers), such as citizens

band (CB) radios, or turn ON personal communication devices, such as cellular
phones, while the powered wheelchair is turned ON;

2) Be aware of nearby transmitters, such as radio or TV stations, and try to avoid

coming close to them;

3) If unintended movement or brake release occurs, turn the powered wheelchair

OFF as soon as it is safe;

4) Be aware that adding accessories or components, or modifying the powered

wheelchair, may make it more susceptible to EMI (NOTE: There is no easy way
to evaluate their effect on the overall immunity of the powered wheelchair); and

5) Report all incidents of unintended movement or brake release to the powered

wheelchair manufacturer, and note whether there is a source of EMI nearby.

Important Information

1) 20 volts per meter (V/m) is a generally achievable and useful immunity level

against EMI (as of May 1994) (the higher the level, the greater the protection);

2) This device has been tested to a radiated immunity level of 20 volts per meter.

3) The immunity level of the product is unknown.

Modification of any kind to the electronics of this wheelchair as manufactured by
Invacare may adversely affect the EMI immunity levels.

Pronto® Series 18 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SECTION 3—SAFETY
INSPECTION/TROUBLESHOOTING

Safety Inspection Checklists

Initial adjustments should be made to suit the end user’s personal body structure,
needs, and preferences. After initial setup, perform these procedures every time the
product is serviced.

All Wheelchairs

CAUTION

As with any vehicle, the wheels and tires should be checked periodically for cracks
and wear, and should be replaced.

❑ Ensure that the wheelchair rolls straight (no excessive drag or pull to one side).
❑ Ensure that the arms are secure but easy to release and adjustment levers engage

properly.

❑ Ensure that adjustable height arms operate and lock securely.
❑ Ensure armrest pads sit flush against arm.
❑ Ensure seat is secured to wheelchair frame.
❑ Ensure seat release latch is functional. Replace if necessary.
❑ Clean upholstery and armrests.
❑ Ensure no excessive side movement or binding occurs when drive wheels are lifted

and spun when disengaged (freewheeling).

❑ Inspect caster assembly has proper tension when caster is spun. Caster should come

to a gradual stop.

❑ Loosen/tighten caster locknut if wheel wobbles noticeably or binds to a stop.
❑ Ensure casters are free of debris.
❑ Ensure all caster/wheel/fork/headtube fasteners are secure.
❑ Inspect tires for flat spots and wear.

❑ Ensure all fasteners on clothing guards are secure.
❑ Seat and/or back upholstery have no rips and do not sag. Replace if necessary.

❑ Inspect seat positioning strap for any signs of wear. Ensure buckle latches. Verify

hardware that attaches strap to frame is secure and undamaged. Replace if necessary.

❑ Ensure wheel mounting nuts are secure on drive wheels.

❑ Check pneumatic tires for proper inflation.

❑ Inspect motor brushes and gearbox coupling.

Part No. 1125075 19 Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

❑ Ensure seat is secured to wheelchair frame.
❑ Ensure seat release latch is not worn and is functional. Replace if necessary.
❑ Ensure arm pivot points are not worn and/or loose. Replace if necessary.
❑ Inspect for any loose hardware on the wheelchair.
❑ Inspect charger AC power cord for damage. Replace if necessary.
❑ Check that all labels are present and legible. Replace if necessary.
❑ Inspect electrical components for signs of corrosion. Replace if corroded or damaged.

Additional Requirements for M61 Wheelchairs

❑ Make sure elevate operates smoothly and properly.

❑ Make sure elevate systems drive with reduced speed when seat is in elevated position.

Troubleshooting

NOTE: For additional troubleshooting information and explanation of error codes, refer to the
individual electronics manual supplied with each wheelchair.

Wheels

SOLUTIONS

FLUTTER

LEFT/RIGHT

WHEELCHAIR VEERS

X X X If pneumatic, check tires for correct and equal pressure.

X X X X Check for loose stem nuts/bolts.

X X Check that casters contact ground at the same time.

SLUGGISH TURN/

CASTERS

PERFORMANCE

RATTLES

SQUEAKS AND

LOOSENESS

IN WHEELCHAIR

About Joystick Diagnostics

The joystick information gauge and the service indicator give indications of the type of
fault or error detected by the control module. When a fault is detected, the wheelchair
may stop and not drive. The LEDs on the information gauge may flash in a particular
pattern or the service indicator light will flash. The number or type of flashes indicates the
nature of the error. If multiple errors are found, only the first error encountered by the
control module will be displayed.

WHEELS

WHEELCHAIR 3

Pronto® Series 20 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SPJ+ Information Gauge Display Diagnostics

DISPLAY DESCRIPTION DEFINITION COMMENTS

Information

Gauge

Display

All LEDs are off. Power is off.

All LEDs are on. Power is on. Fewer than three LEDs on

Left RED LED is flashing. Battery charge is low. The batteries should be

implies reduced battery
charge.

charged as soon as possi­ble.

Left to Right “chase” alter­nating with steady display.

All LEDs are flashing slowly. Joystick has detected Out-

Joystick is in program­ming, inhibit and/or charg­ing mode.

of-Neutral-at-Power-Up
mode.

The steady LEDs indicate
the current state of the
battery charge.

Release the joystick back
to Neutral.

Part No. 1125075 21 Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SPJ Information Gauge Display Diagnostics

DISPLAY DESCRIPTION DEFINITION COMMENTS

All three LEDs are Off. Power is Off.

INVACARE

All three LEDs are On. Power is On. Fewer than three LEDs

INVACARE

RED LED is flashing. Battery charge is low. The batteries should be

INVACARE

On implies reduced
battery charge.

charged as soon as
possible.

INVACARE

INVACARE

INVACARE

Left to Right “chase”
alternating with steady
display.

Joystick is in
programming, inhibit
and/or charging mode.

GREEN LED is flashing. Joystick is in Speed Limit

mode.

All LEDs are flashing slowly. Joystick has detected Out-

of-Neutral-at-Power-Up
mode.

All LEDs are flashing
quickly.

Joystick has detected a
fault.

The steady LEDs indicate
the current state of the
battery charge.

The current state of
battery charge will be
displayed at the same
time.

Release the joystick back
to Neutral.

Joystick uses Flash codes
to indicate faults.

INVACARE

Pronto® Series 22 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Diagnostic Codes

POSSIBLE

ERROR CODE

DESCRIPTION

DIAGNOSTICS CODE

NUMBER OF FLASHES

1 E 01 User Fault 00 Stall Timeout or user error. Release joystick to neutral and try again.

2 E02 Battery Fault 00 Recharge batteries or replace. Check the batteries and cable. Try charg-

3 E03 Left Motor Fault 00 Left Motor Short Circuit Check the left motor, connections and

SUB CODE*

01 Left Motor Open Circuit

02 Left Motor Connection Fault

03 Motor Terminal Connected

04 Left Motor Voltage Fault

DETAILS OF

B-

to B+

ERROR CODE

ing the batteries. Batteries may require

motor cable.

SOLUTION

replacing.

05 Left Motor Bridge Fault

06 Too Many Hardware Current

Limit Events

07 Current Offset Out of Range

08 Hardware Current Limit Fault

4 E04 Right Motor Fault 00 Right Motor Short Circuit Check the right motor, connections and

01 Right Motor Open Circuit

02 Right Motor Connection Fault

B-

03 Motor Terminal Connected

to B+

04 Right Motor Voltage Fault

05 Right Motor Bridge Fault

06 Too Many Hardware Cur-

rent Limit Events

07 Current Offset Out of Range

08 Hardware Current Limit Fault

motor cable.

Part No. 1125075 23 Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

ERROR CODE

DESCRIPTION

DIAGNOSTICS CODE

NUMBER OF FLASHES

5 E05 Left Park Brake

Fault

6 E06 Right Park Brake

Fault

SUB CODE*

00 Left Park Brake Drive-Time

01 Left Park Brake Output

Enabled When Wheelchair

02 Left Park Brake Output Did

not Enable When Entering

03 Left Park Brake fault during

power-up testing

04 Left park brake feedback low

during drive (park brake

00 Right Park Brake Drive-Time

DETAILS OF

ERROR CODE

Test Failed

Idle

Drive Mode

short)

Test Failed

POSSIBLE

SOLUTION

Check the left park brake connections and

cable.

Check the right park brake connections

and cable.

01 Right Park Brake Output

Enabled When Wheelchair

Idle

02 Right Park Brake Output Did

not Enable When Entering

Drive Mode

03 Right Park Brake fault during

power-up testing

04 Right park brake feedback

low during drive (park brake

short)

7 E07 Remote Fault 00 Local SR Fault (CPU,

EEPROM, etc.)

01 Joystick fault at the remote

02 Speed pot fault at the remote

Check the communications bus, connec-

tions and wiring. Replace the remote.

Pronto® Series 24 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

POSSIBLE

ERROR CODE

DESCRIPTION

DIAGNOSTICS CODE

NUMBER OF FLASHES

8 E08 Controller Fault 00 Controller fault Check connections and wiring. Replace

SUB CODE*

01 RAM fault

02 ROM fault

03 CPU fault

04 EEPROM fault

05 Watchdog fault

06 Stack fault

07 Software fault

08 Power-up testing fault

DETAILS OF

ERROR CODE

power module.

SOLUTION

09 Relay fault or precharge fault

10 Bridge fault or disable all fault

11 Electronics fault: Thermistor

12 Calibration setting fault

9 E09 Communications

Fault

10 E10 General Fault 00 General fault Check all connections and wiring. Contact

11 E11 Incompati-

ble/incorrect

Remote

00 Remote connection lost Check connections and wiring. Replace

01 Low communication mode

00 Incompatible/incorrect

Remote

Invacare Technical Service.

Wrong type of remote connected. Ensure

the branding of the joystick matches that

Bus cable.

of controller unit.

Motor/Gearbox/Brake

SYMPTOM PROBABLE CAUSE SOLUTIONS

Bad bearings. If bearings are bad, replace motor. Refer to

Motor makes a
clicking noise.

Raised commutator plate inside of
motor.

Removing/Installing the Motor

Ohm out motor and replace motor if high reading
is present. Normal reading is .5-5 Ohms. Refer to
Motor Testing
the Motor on page 112.

on page 31 or Removing/Installing

on page 112.

Grinding noise or
motor is locking
up.

Motors stall and
starts up again.

Part No. 1125075 25 Pronto® Series

Bad bearings. Bad Gears. Replace motor/gearbox. Refer to

Removing/Installing the Motor

Current Rollback. Stop driving and let electronics cool.

on page 112.

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SYMPTOM PROBABLE CAUSE SOLUTIONS

Motor chatters or
runs erratically, or
only one motor
turns.

Wheelchair veers
to the left or right
when driving on
level surface.

Gearbox is leaking
Fluid.

Damaged connector or worn
brushes.
Bad motor or gear box.

Motor release lever is disengaged. Engage motor release levers. Refer to

Controller malfunction. Check for error codes with programmer. Refer to

Uneven tire pressure.
Motors out of balance.

Bad seal around drive shaft.

Loose hardware.

Ohm out motors. Check brushes and replace
brushes if necessary. Replace motor/gearbox if
high reading is present. Normal reading is 0-5
Ohms. Refer to Motor Testing
Replacing Motor Brushes
Removing/Installing the Motor

Engaging/Disengaging Motor Release Lever
page 114.

electronics manual.

Inflate tires.
Replace tires if worn.
Use programmer to balance motors.

If seal is bad, replace motor/gearbox. Remove
motor brushes and inspect for grease
contamination. Replace motor/gearbox if
contamination is found. Refer to Replacing Motor
Brushes on page 116 or Removing/Installing the
Motor on page 112.

on page 31,

on page 116 or

on page 112.

on

Bad bearing in motor or gearbox. Replace motor/gearbox. Refer to

Excessive clicking
coming from
motor/gearbox.

Rough driving. Gearbox shaft movement or bent

Motor Stutters.

Motor Fails to start
after initial
installation.

Loose wheel hardware. Tighten hardware, (use removable Loctite™on

shaft.

Poor connection or worn brushes. Check DCL connectors. Check brushes and

Battery voltage is too low.
Bad Connection.
Brake Disengaged.

If loose hardware is found retighten hardware.

Removing/Installing the Motor

hardware). Follow torque settings in this manual.

Replace motor/gearbox. Refer to
Removing/Installing the Motor

replace if necessary. Refer to Replacing Motor
Brushes on page 116.

Check batteries and recharge if necessary. Refer
to Charging Batteries
Check connector.
Engage brake.

on page 104.

on page 112.

on page 112.

Pronto® Series 26 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SYMPTOM PROBABLE CAUSE SOLUTIONS

Motor is running
then fails to restart
when stopped.

Motor runs but
loses power.

Heavy load on the motors forcing
controller into the current rollback
mode.

Blown fuse in battery wiring
harness.

Damaged motor. Replace brushes if necessary, or replace

Controller power stage board or
relays may be damaged.

Controller senses heavy load and
has entered the current rollback
mode.

Batteries are going bad. Replace batteries. Refer to Removing/Installing

Leave power On and allow controller to count
down, and recharge the batteries overnight with
power On.

Replace battery wiring harness. Refer to
Connecting/Disconnecting Battery Cables
page 101.

motor/gearbox if internal damage is determined.
Refer to Replacing Motor Brushes
Removing/Installing the Motor

Ohm out motor to check for possible internal
damage (worn out brushes may be possible).
Refer to Motor Testing
Motor Brushes on page 116.

Replace controller or send to Invacare for repair.
Refer to Replacing the Controller

Stop driving and let electronics cool.

Batteries from/into Battery Tray on page 99.

on page 31 or Replacing

on page 116 or

on page 112.

on page 125.

on

Wheelchair loses
all power while
driving.

Bad Connection on wheelchair. Turn power “Off”, wait 10 seconds and turn

power back “On”.
Check joystick connection.
Check battery connection and fuses.

Battery

SYMPTOM PROBABLE CAUSE SOLUTIONS

Batteries won’t
charge.

Short Charge Time

Blown battery fuse or damaged cables.

Batteries sat discharged too long.

One or both batteries may be bad (if
batteries charge up to soon).

Check cables for damage or replace battery wiring
harness. Refer to Connecting/Disconnecting
Battery Cables on page 101.
Replace batteries. Refer to Removing/Installing
Batteries from/into Battery Tray on page 99.

Check each battery and replace if needed. Refer to
Removing/Installing Batteries from/into Battery
Tray on page 99.

Part No. 1125075 27 Pronto® Series

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SYMPTOM PROBABLE CAUSE SOLUTIONS

Check all connections and housings for damage. If
you have blown fuse a new battery wiring harness
must be purchased. Refer to
Connecting/Disconnecting Battery Cables
page 101.
Check battery voltage and replace if necessary.
Refer to Removing/Installing Batteries from/into
Battery Tray on page 99.

vibrated loose when driving on rough terrain.

Replace battery wiring harness. Refer to
Connecting/Disconnecting Battery Cables
page 101.

No power to
wheelchair motors.

Corroded battery
wiring connections.

Bad connection or blown fuse. Check
Joystick connection.

Batteries are dead.

Loose battery connections. Check battery cable connections, may have

Possible water, salt, or urine
damage.

Battery Charger

SYMPTOM PROBABLE CAUSE SOLUTIONS

No LED’s on
Charger

Batteries won’t
charge.

Charger not plugged into outlet, or
disconnected from wiring harness on
wheelchair.

No AC power at outlet. Check for AC power with digital volt meter.

Damaged power cord. Check for damage on the power cord, replace if

Charger LED’s burnt out. Send charger to Invacare for repair.

Charger may have internal fuse that is
blown.

Blown battery fuse in wiring harness,
or charger.

Charger not plugged into outlet. Make sure charger is plugged into the outlet.

No AC power at the outlet. Check for AC power with a digital volt meter.

Charger Power cord may be
damaged, or the connector may be
damaged.

Charger may have internal damage. Charge batteries with known good charger.

Battery voltage too low for charger to
start charging cycle.

Make sure the charger is plugged into the outlet
and check the wiring on the wheelchair.

damaged or send to Invacare for repair.

Remove charger cover and check for fuses. iI fuses
are present, Ohm out fuses and replace if
necessary. Refer to Replacing the On-Board
Battery Charger Fuse on page 108.

Check battery wiring harness fuse on the
wheelchair. Replace battery wiring harness if fuse is
blown. Refer to Connecting/Disconnecting Battery
Cables on page 101.
Check fuse in the charger. Refer to Replacing the
On-Board Battery Charger Fuse on page 108.

Check for damage and replace if necessary, or
send in for repair.

Replace batteries. Refer to Removing/Installing
Batteries from/into Battery Tray on page 99.

on

on

Pronto® Series 28 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SYMPTOM PROBABLE CAUSE SOLUTIONS

Batteries have
short driving range
during a single
charge. Battery
Gauge falls off
faster than normal.

Consumer not charging batteries long
enough.

Batteries may be weak. Perform load test or check “Battery Quality Menu”

Check programming settings. Torque setting and power level setting may be too

Heavy load on motors. Chairs weight distribution may be offset

Instruct consumer to charge for 8-10 hours
minimum.

with the programmer. Refer to electronics manual.
Refer to Field Load Test

high. Refer to electronics manual.

(wheelchair may be front loaded).

M61 Only

SYMPTOM PROBABLE CAUSE SOLUTIONS

Wheelchair slows
or stops while
driving and the Seat
Function I indicator
is lit.

Elevating seat is elevated. Return seat to its lowest position. Refer to

Elevating the Seat

Elevating seat sensor is damaged. Examine elevating seat sensor. Replace if necessary.

Refer to Removing/Installing the Actuator Switch
Sensor on page 97.

on page 37.

on page 30.

Checking Battery Charge Level

The following “Do’s” and “Don’ts” are provided for your convenience and safety.

DO DON’T

Read and understand this manual and any service
information that accompanies a battery and charger
before operating the wheelchair.

Move the wheelchair to a work area before opening
battery box or installing service batteries.

Recharge as frequently as possible to maintain a high
charge level and extend battery life.

Follow recommendations in this manual when
selecting a battery or charger.

Fully charge new batteries before using. Don’t put new batteries into servcie before charging.

Use a carrying strap to remove, move or install a
battery.

Push battery clamps on the terminals. Spread clamps
wider if necessary.

Don’t perform any installation or maintenance without
first reading this manual.

Don’t perform installation or maintenance of batteries
in an area that could be damaged by battery spills.

Don’t make it a habit to discharge batteries to the
lowest level.

Don’t use randomly chosen batteries or chargers.

Don’t tip or tilt batteries.

Don’t tap on clamps and terminals with tools.

Use ONLY a GEL charger for a GEL battery or
“Sealed” battery.

Part No. 1125075 29 Pronto® Series

Don’t mismatch your battery and chargers.

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Field Load Test

NOTE: For this procedure, refer to FIGURE 3.1 on page 31.

Old batteries lose their ability to store and release power, due to increased internal
resistance. This means that as you try to take power from the battery, some of that power
is used up in the process of passing through the battery, resulting in less voltage at the
posts. The more power drawn, the lower the voltage available. When this lost voltage
drops the output 1.0 volts under load (2.0 for a pair), replace the batteries.

To spot this problem, test batteries under load.

Use a digital voltmeter to check battery charge level at the charger connector. The charger
connector is located on the joystick.

NOTE: Read these instructions carefully and the manufacturer’s instructions on the digital
voltmeter before using the digital voltmeter.

1. Ensure that power is Off.

2. Make sure battery is fully charged. An extremely discharged battery will exhibit the

same symptoms as a bad one.

3. Remove the footrests from the wheelchair. Refer to Front Riggings/FootBoard on

page 73.

4. Connect the voltmeter leads to the charger port on the wheelchair as shown in

FIGURE 3.1. Most digital voltmeters are not affected by polarity, however, analog
meters (meters with swinging needles) can be and should be used carefully. A good
meter reading should be 25.5 to 26 VDC.

 WARNING

When performing STEPS 5 and 6, ensure feet are clear from casters and wall,
otherwise injury may result.

5. Sit in wheelchair and place feet against a wall, workbench or other stationary object.

6. Turn the power On and carefully push the joystick forward, trying to drive the

wheelchair through the stationary object.

NOTE: Performing STEP 6 puts a heavy load on the batteries as they try to push through the
stationary object. If the wheels spin, have two individuals (one on each arm) apply as much
downward pressure as possible on the arms of the wheelchair.

7. Read the meter while the motors are straining, no longer than 3-4 seconds, to

determine the voltage under load.

NOTE: If the voltage drops more than 2 volts from a pair of fully charged batteries while under
load, they should be replaced regardless of the unloaded voltages.

Pronto® Series 30 Part No. 1125075

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

Charger

Port

Digital

Voltmeter

BATTERY
QUALITY

0 to 2 volts Good

2 to 2.5 volts Poor

2.5 or more Bad

FIGURE 3.1 Field Load Test

Motor Testing

NOTE: For this procedure, refer to FIGURE 3.2.

1. On the 4-pin motor connector, locate

the two contacts in the RED and
BLACK housings.

2. Set the digital multimeter to measure

resistance (ohms).

Cap

Motor

3. Measure the resistance between the

two motor contacts.

NOTE: A normal reading is between .5 and 5
ohms. A reading of 0 ohms or in excess of 15
ohms indicates a problem. High readings are

4 Pin Motor

Connector

generally caused by bad connections and/or
damaged brushes. Contact Invacare.

Part No. 1125075 31 Pronto® Series

FIGURE 3.2 Motor Testing

SECTION 4—WHEELCHAIR OPERATION

SECTION 4—WHEELCHAIR
OPERATION

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Set-up of the Electronic Control Unit is to be performed only by a qualified
technician. The final adjustments of the controller may affect other activities of the
wheelchair. Damage to the equipment could occur if improperly set-up or adjusted.

Turning the Power On/Off

M50 and M51 Wheelchairs Manufactured Before 8/15/05

NOTE: For this procedure, refer to FIGURE 4.1.

1. Turn the power On by moving the On/Off switch up or down. The switch

automatically retracts back to center position.

NOTE: After turning power On, all indicators
will light briefly and the display gauge will
indicate one of the following:

• The Current Battery Charge ­Information gauge shows all LEDs lit
or partial LEDs lit. Refer to table in
Information Gauge Display on page 40.

• Out Of Neutral At Power Up ­Information Gauge shows all LEDs
flashing slowly. This occurs when the
power is turned On when the joystick is
out of neutral. This feature prevents
sudden and unexpected movements of
the power chair.

2. Turning the power Off can be achieved
by moving the On/Off switch up or
down. The switch automatically
retracts back to center position.

INVACARE

Information

ON/OFF

Toggle Switch

Gauge

FIGURE 4.1 Turning the Power On/Off -

M50 and M51 Wheelchairs Manufactured

Before 8/15/05

Pronto® Series 32 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

M50/M51 Wheelchairs Manufactured After 8/14/05 and all M61
Wheelchairs

NOTE: For this procedure, refer to FIGURE 4.2.

1. Turn the power On by pressing the
On/Off button.

NOTE: After turning power On, the battery
gauge indicators will light briefly. One of the
following will occur after that:

• The current battery charge will be indicated
on the information gauge display.

• Lock Mode will be indicated by all LEDs
flashing briefly and the information gauge
LEDs chasing slowly from right to left. If
this occurs, press the horn button two times
within ten seconds to unlock the joystick.

2. Turning the power Off by pressing the
On/Off button.

NOTE: If the joystick has been programmed for lock mode, holding the On/Off button down for
four seconds will lock the joystick. The LEDs will flash briefly and the horn will sound a short beep.

NOTE: SPJ+ w/ACC joystick shown. SPJ+
joystick works the same way.

FIGURE 4.2 Turning the Power On/Off -

M50/M51 Wheelchairs Manufactured After

8/14/05 and all M61 Wheelchairs

Information

Gauge Display

On/Off

Button

Using the Joystick to Drive the Wheelchair

 WARNING

DO NOT operate wheelchair on an incline while in an elevated position. Otherwise,
the wheelchair may tip over and injury or damage may occur.

NOTE: For this procedure, refer to FIGURE 4.3 on page 34.

The joystick provides smooth control of speed and direction. It is equipped with 360
degrees of mobility for ease of operation. The joystick is spring-loaded, and automatically
returns to the upright (neutral) position when released. Pushing the joystick in a given
direction causes the chair to move in that direction.

The joystick has proportional control, meaning that the further it is pushed from the
upright (neutral) position, the faster the wheelchair moves or the seat elevates/lowers.
The maximum speed, however, is limited by the speed setting.

To slow the wheelchair to a stop, simply release the joystick. The wheelchair has
automatic speed and direction compensation to minimize corrections.

Part No. 1125075 33 Pronto® Series

SECTION 4—WHEELCHAIR OPERATION

When first learning to drive, select a slow speed and try to drive the wheelchair as slowly
as possible by pushing the joystick slightly forward. This exercise will help you learn to
utilize the full potential of the proportional control and allow you to start and stop
smoothly.

To drive the wheelchair, perform the following:

1. Turn the power On. Refer to Turning the Power On/Off on page 32.

2. Adjust speed. Refer to Adjusting the Speed on page 35.

3. Maneuver the joystick in the following manner:

MOVEMENT ACTION

FORWARD Push forward on the joystick.

REVERSE Pull back on the joystick.

Turn RIGHT Move the joystick RIGHT.

Turn LEFT Move the joystick LEFT.

STOP Release the joystick and the wheelchair will quickly slow down.

M50 and M51 Wheelchairs

Manufactured Before 8/15/05

To Move Left

Joystick

To Move

Backward

FIGURE 4.3 Using the Joystick to Drive the Wheelchair

To Move

Forward

To Move

Right

M50/M51 Wheelchairs Manufactured After 8/14/05 and

All M61 Wheelchairs

To Move

Forward

To Move Left

Joystick

To Move

Right

To Move
Backward

NOTE: SPJ+ w/ACC joystick shown. SPJ+
joystick works the same way.

Pronto® Series 34 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

Adjusting the Speed

M50 and M51 Wheelchairs Manufactured Before 8/15/05

NOTE: For this procedure, refer to FIGURE 4.4.

1. Turn the speed control knob to adjust
the speed:

• Clockwise - Increase speed.

• Counterclockwise - Decrease speed.

Speed

Control

Knob

FIGURE 4.4 Adjusting the Speed - M50 and

M51 Wheelchairs Manufactured Before

8/15/05

M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61
Wheelchairs

NOTE: For this procedure, refer to FIGURE 4.5 on page 36.

1. Perform one of the following:

• Adjust Speed in 20% Increments (5 Speed Mode) - Press the tortoise button ( )

or hare button ( ) to decrease/increase the speed in 20% increments. The larger
bars in the speedometer will light.

• Adjust Speed in Smaller Increments (VSP Mode) - Perform the following steps:

i. Press and hold both the tortoise button ( ) and hare button ( ) until the

joystick beeps.

ii. Perform one of the following:

• Press the tortoise button ( ) or hare button ( ) to decrease/increase the
speed in 20% increments. The larger bars in the speedometer will light.

• Press and hold the tortoise button ( ) or hare button ( ) to
decrease/increase the speed in smaller increments. The smaller bars in the

speedometer will light.

Part No. 1125075 35 Pronto® Series

SECTION 4—WHEELCHAIR OPERATION

Smaller Bar in Speedometer

Tortoise Button

NOTE: SPJ+ w/ACC
joystick shown. SPJ+
joystick works the
same way.

FIGURE 4.5 Adjusting the Speed - M50/M51 Wheelchairs Manufactured After 8/14/05 and All

M61 Wheelchairs

Hare Button

Larger Bar in Speedometer

Using the Horn

M50 and M51 Wheelchairs
Manufactured Before 8/15/05

NOTE: For this procedure, refer to
FIGURE 4.6.

1. Press the horn button located above the
information gauge on the joystick
housing.

FIGURE 4.6 Using the Horn - M50 and

M51 Wheelchairs Manufactured Before

8/15/05

Horn

Button

Pronto® Series 36 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

M50/M51 Wheelchairs Manufactured After 8/14/05 and All M61
Wheelchairs

NOTE: For this procedure, refer to
FIGURE 4.7.

1. Press the horn button located in the
center of the speed indicator. The horn
will sound for as long as the button is
pressed.

NOTE: SPJ+
w/ACC joystick
shown. SPJ+
joystick works
the same way.

FIGURE 4.7 Using the Horn - M50/M51

Wheelchairs Manufactured After 8/14/05 and

All M61 Wheelchairs

Elevating the Seat

Horn

Button

 WARNING

DO NOT operate wheelchair on an incline while in an elevated position. Otherwise,
the wheelchair may tip over and injury or damage may occur.

DO NOT operate the elevate function near or under a fixed object such as a table
or desk.

Use only the MK5™NX w/ACC or MK660 w/ACC controller to activate the elevate
function. DO NOT use any other actuator controls. Such devices may result in
excess heating and cause damage to the actuator and associated wiring and could
cause a fire, death, physical injury or property damage. If such devices are used,
Invacare shall not be liable and the limited warranty is void.

The elevated seat option is equipped with a speed reduction safety mechanism.
While the seat is in an elevated position, the safety feature slows the speed of the
wheelchair by 80%. If the wheelchair operates at maximum speed while in an
elevated position, DO NOT operate the wheelchair. Have the wheelchair serviced
IMMEDIATELY by a qualified technician.

Part No. 1125075 37 Pronto® Series

SECTION 4—WHEELCHAIR OPERATION

NOTE: For this procedure, refer to FIGURE 4.8.

NOTE: This procedure applies to M61 wheelchairs only.

1. Make sure the wheelchair is on a level surface.

2. Press the mode button to switch from driving mode to elevate mode.

NOTE: The LED will light up with a circle around it.

3. Move the joystick:

• Forward - Elevates the seat.

• Backward - Lowers the seat.

Elevated Seat

Selected

Drive
Mode

Joystick

FIGURE 4.8 Elevating the Seat

Mode

Button

Elevate

the Seat

Lower

the Seat

Pronto® Series 38 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

SPJ™Joystick Switches and Indicators

NOTE: For the following information, refer to FIGURE 4.9.

NOTE: The SPJ joystick is used on M50 and M51 wheelchairs manufactured before 8/15/05 only.

Joystick

Speed Control Knob

On/Off

Toggle Switch

FIGURE 4.9 SPJ™Joystick Switches and Indicators

Charger/Programmi

ng Input

To Controller

On/Off Toggle Switch

This toggle switch is located at the back of the joystick housing.

Speed Control Knob

The speed control knob is located on the back of the joystick housing. This rotary switch
is used for controlling the speed and acceleration of the wheelchair.

1. Turn the switch clockwise to increase the speed of the wheelchair.

2. Turn the switch counterclockwise to decrease the speed of the wheelchair.

Joystick

The joystick has proportional drive control, meaning that further the wheelchair is
pushed from the upright (neutral) position, the faster it moves. Your top speed, however,
is limited by the setting of the speed-control knob and programmed settings.

To slow the wheelchair to a stop, simply release the joystick. The wheelchair has
automatic speed and direction compensation to minimize corrections.

Charger/Programming Input

Located at the front of the joystick housing. This provides easy access for charging the
wheelchair batteries. This port also serves as the Remote Programmer Communication
connection.

Part No. 1125075 39 Pronto® Series

SECTION 4—WHEELCHAIR OPERATION

Information Gauge Display

Located on the front of the joystick housing, it provides the following information to the
user on the status of the wheelchair -

1. Power is On.

2. True state-of-battery-charge, including notification of when the battery requires
charging:

A. GREEN LED is lit, indicating well charged batteries.

B. Only AMBER LEDs are lit, indicating batteries are moderately charged. Recharge

batteries before taking a long trip.

C. Only RED LED is lit, indicating batteries are running out of charge. Recharge

batteries as soon as possible.

The Information Gauge display also serves as a system diagnostic device when a fault is
detected by the control module. A specific number of flashes of the LEDs indicate the type
of fault detected. Refer to SPJ Information Gauge Display Diagnostics on page 22.

Pronto® Series 40 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators

NOTE: For the following information, refer to FIGURE 4.10.

NOTE: SPJ+ joysticks are used on M50/M51 wheelchairs manufactured after 8/14/05.

NOTE: SPJ+ w/ACC joysticks are used on M61 wheelchairs.

SPJ+ Joystick

Joystick

Information

Gauge

On/Off

Button

Display

Decrease

Speed Button

(Tortoise)

GREEN

LED

On/Off

Button

Decrease

Speed Button

(Tortoise)

GREEN

LED

Service Indicator

SPJ+ w/ACC Joystick

Speedometer

Increase

Speed Button

Information

Gauge

Display

Mode Button

Speedometer

Speed Button

(Hare)

Increase

(Hare)

DETAIL “A” -

FRONT VIEW

Charger/Progra

mming Input

Joystick

DETAIL “A” -

FRONT VIEW

Charger/Progra

mming Input

Service Indicator

FIGURE 4.10 SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators

Part No. 1125075 41 Pronto® Series

SECTION 4—WHEELCHAIR OPERATION

On/Off Button

This button is located at the front of the joystick housing. It is used to turn the wheelchair
On and Off, to remove the joystick from sleep mode (if programmed) and to lock or
unlock the joystick (if programmed).

Speedometer

The speedometer is used to show the maximum speed. The right-most LED indicates
current maximum speed setting. The bottom left GREEN LED flashes to indicate that the
joystick is in speed limit mode. Speed limit mode limits the drive speed to a
pre-programmed value, typically when the seat has been elevated and the wheelchair is
required to drive at 20% speed.

Speed Control Buttons

The speed control buttons (tortoise button ( ) and hare button ( )) are used to set and
adjust the maximum speed.

1. To adjust the speed, perform one of the following:

• Adjust Speed in 20% Increments (5 Speed Mode) - Press the tortoise button ( )

or hare button ( ) to decrease/increase the speed in 20% increments. The larger
bars in the speedometer will light.

• Adjust Speed in Smaller Increments (VSP Mode) - Perform the following steps:

i. Press and hold both the tortoise button ( ) and hare button ( ) until the

joystick beeps.

ii. Perform one of the following:

• Press the tortoise button ( ) or hare button ( ) to decrease/increase the
speed in 20% increments. The larger bars in the speedometer will light.

• Press and hold the tortoise button ( ) or hare button ( ) to
decrease/increase the speed in smaller increments. The smaller bars in the
speedometer will light.

Mode Button

NOTE: The mode button is present on the SPJ+ w/ACC joystick only.

Press the mode button to switch from driving mode to elevate mode. Refer to the
wheelchair owner’s manual for elevating seat operating instructions.

Pronto® Series 42 Part No. 1125075

SECTION 4—WHEELCHAIR OPERATION

Joystick

The joystick has proportional drive control, meaning that further the joystick is pushed
from the upright (neutral) position, the faster the wheelchair or seat moves. Your top
speed, however, is limited by the programmed settings.

To slow the wheelchair to a stop, simply release the joystick. The wheelchair has
automatic speed and direction compensation to minimize corrections.

Charger/Programming Input

The charger/programming input is located at the front of the joystick housing. This
provides easy access for charging the wheelchair batteries. This port also serves as the
Remote Programmer Communication connection. Driving is prevented while the system
is charging.

Service Indicator

The AMBER service indicator will light when an error or fault occurs. Refer to electronics
manual supplied with wheelchair.

Information Gauge Display

Located on the front of the joystick housing, it provides the following information to the
user on the status of the wheelchair -

1. Power is On.

2. True state-of-battery-charge, including notification of when the battery requires
charging:

A. GREEN LEDs are lit, indicating well charged batteries.

B. AMBER LEDs are lit, indicating batteries are moderately charged. Recharge

batteries before taking a long trip.

C. RED LEDs are lit, indicating batteries are running out of charge. Recharge batteries

as soon as possible.

The Information Gauge display also serves as a system diagnostic device when a fault is
detected by the control module. A specific number of flashes of the LEDs indicate the type
of fault detected. Refer to the table for the diagnostic indications of the wheelchair status.

Part No. 1125075 43 Pronto® Series

SECTION 5—ARMS

SECTION 5—ARMS

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

Removing/Installing Van Seat Arm

NOTE: For this procedure, refer to FIGURE 5.1 on page 45.

NOTE: Reverse this procedure to install the adjustable width arms.

1. If necessary, disconnect the joystick. Disconnecting/Connecting the Joystick on
page 123.

2. Loosen lock knob that secures the adjustable width arm to the arm support tube.

3. Remove the adjustable width arm from the arm support tube.

4. If necessary, repeat STEPS 1-3 to remove the remaining adjustable width arm.

Adjusting Van Seat Arm Width

 WARNING

Increasing the width of the arms may affect the overall width of the wheelchair.
Ensure that there is enough clearance when attempting to pass through doorways
or other tight spaces, otherwise serious injury or damage may result.

NOTE: For this procedure, refer to FIGURE 5.1 on page 45.

1. Loosen the two lock knobs that secure the adjustable width arms to the arm support
tube.

NOTE: Both adjustable width arms should be adjusted to the same distance away from the arm
support tube.

NOTE: Changing the width of the adjustable width arms may also effect the overall width of the
wheelchair.

2. Reposition adjustable width arms until desired width is achieved.

3. Securely tighten the two lock knobs that secure the adjustable width arms to the arm
support tube.

Pronto® Series 44 Part No. 1125075

Adjustable Width Arm

SECTION 5—ARMS

Lock

Knob(s)

FIGURE 5.1 Removing/Installing Van Seat Arm and Adjusting Van Seat Arm Width

Arm Support

Tube

Adjusting Van Seat Arm Angle

 WARNING

Pinch point may occur when adjusting the arm angle position.

NOTE: For this procedure, refer to FIGURE 5.2 on page 46.

1. Lift-up the armrest.

2. Loosen the jam nut.

3. Adjust the socket screw up or down to the desired arm angle position.

4. Tighten the jam nut.

5. To determine the same angle for the opposite armrest, count the exposed threads after
the jam nut has been tightened.

6. Repeat STEPS 1-5 for opposite armrest, if necessary.

Adjusting Van Seat Arm Height (Adjustable Height
Arms Only)

NOTE: For this procedure, refer to FIGURE 5.2 on page 46.

1. Remove the lock knob that secures the armrest to the arm frame assembly.

2. Adjust the armrest to one of five positions in 1-inch increments.

3. Reinstall the lock knob that secures the armrest to the arm frame assembly and tighten
securely.

Part No. 1125075 45 Pronto® Series

SECTION 5—ARMS

Angle

Pinch Point

Armrest

Socket Screw

Jam NutCount Exposed Threads

Height

Height

Adjustment

Holes

Lock Knob

Armrest

Arm Frame

Assembly

FIGURE 5.2 Adjusting Van Seat Arm Height (Adjustable Height Arms Only)

Replacing Van Seat Armrest Assembly

NOTE: For this procedure, refer to FIGURE 5.3.

1. If necessary, remove the joystick. Removing/Installing the Joystick on page 120.

2. Remove the mounting screw, washers and locknut that secure the existing armrest
assembly to the arm post.

3. Position the new armrest assembly on the armrest post and secure with the mounting
screw, washers, and locknut. Refer to FIGURE 5.3 for correct hardware orientation.

4. If necessary, install the joystick. Removing/Installing the Joystick on page 120.

5. Repeat STEPS 1-4 for the opposite armrest assembly, if necessary.

Washer

Mounting Screw

Arm Post

Locknut

Washers

Armrest

Assembly

FIGURE 5.3 Replacing Van Seat Armrest Assembly

Pronto® Series 46 Part No. 1125075

SECTION 5—ARMS

Removing/Installing Flip Back Armrest

 WARNING

Make sure the flip back armrest release levers and height adjustment levers are in
the locked position before using the wheelchair.

NOTE: For this procedure, refer to FIGURE 5.4.

NOTE: Flip back armrest release lever MUST be in unlocked position when placing armrest into
the arm sockets.

NOTE: Reverse this procedure to install the flip back armrest.

1. If necessary, disconnect the joystick. Disconnecting/Connecting the Joystick

on

page 123.

2. Unlock flip back armrest by pulling flip back armrest release lever into the unlocked
(horizontal) position.

3. Remove quick release pin securing the flip back armrest to the wheelchair frame.

4. Pull up on the flip back armrest and remove the armrest from the arm sockets.

5. Repeat STEPS 1-4 for the opposite flip back armrest, if necessary.

Flip Back Armrest

Rear Arm Socket

Quick Release Pin

Flip Back Armrest Release Lever

Locked

(Vertical)

Unlocked

(Horizontal)

Seat Frame

Front Arm Socket

FIGURE 5.4 Removing/Installing Flip Back Armrest

Part No. 1125075 47 Pronto® Series

SECTION 5—ARMS

Adjusting the Flip Back Armrest Height

 WARNING

Make sure the flip back armrest release levers and height adjustment levers are in
the locked position before using the wheelchair.

NOTE: For this procedure, refer to FIGURE 5.5.

1. Unlock top of flip back armrest by pulling height adjustment lever into the up
(horizontal) position.

2. Adjust top of the flip back armrest to the desired height.

3. Lock top of flip back armrest by pushing height adjustment lever into the down
(vertical) position.

4. Lift up on flip back armrest to make sure the armrest is locked in place.

5. Repeat STEPS 1-4 for opposite flip back armrest, if necessary.

Height

Adjustment

Lever

Flip Back

Armrest

Front Arm Socket

Flip Back Armrest

Release Lever

(Down - Vertical)

(Up - Horizontal)

FIGURE 5.5 Adjusting the Flip Back Armrest Height

Locked

Unlocked

Pronto® Series 48 Part No. 1125075

SECTION 6—VAN SEAT

SECTION 6—VAN SEAT

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

Adjusting the Back Angle

Semi-Recline Back Angle

NOTE: For this procedure, refer to FIGURE 6.1.

1. Lift up on the release handle and adjust seat to desired angle.

2. Let go of the release handle to lock the back in position.

Release Handle

NOTE: Office style van seat
is shown. Standard van seat
operates the same way.

FIGURE 6.1 Adjusting the Back Angle - Semi-Recline Back Angle

Office Style

Van Seat

Fold Down Back Angle

NOTE: For this procedure, refer to FIGURE 6.2 on page 50.

1. Remove the two shoulder bolts and locknuts from the seat hinges on either side of the
seat.

2. Select one of the four back angle positions as shown in Detail “A” of FIGURE 6.2.

3. Reinstall and tighten the two shoulder bolts and locknuts through the desired back
angle setting on each seat hinge.

NOTE: Both seat hinges should be set to the same back angle setting.

Part No. 1125075 49 Pronto® Series

SECTION 6—VAN SEAT

Shoulder

Bolt

Seat Hinge

Locknut

110°

95°

Shoulder

Bolt

DETAIL “A”

105°

100°

FIGURE 6.2 Adjusting the Back Angle - Fold Down Back Angle

Adjusting the Headrest (Semi-Recline Only)

NOTE: For this procedure, refer to FIGURE 6.3.

1. To raise the headrest, lift the headrest up to the desired position.

2. To lower the headrest, push the release tab towards the front of the wheelchair. Lower
the headrest to the desired position.

Headrest

Release Tab

Headrest

Tube

FIGURE 6.3 Adjusting the Headrest (Semi-Recline Only)

Removing/Installing the Seat Assembly

NOTE: For this procedure, refer to FIGURE 6.4 on page 51.

Removing

1. Disconnect the joystick. Refer to Disconnecting/Connecting the Joystick on page 123.

2. Fold down the seat back.

3. Pull the seat lever up and lift the seat assembly up and away from the seat post.

Installing

1. Align the seat pivot with the seat post.

2. Pull the seat lever up and lower the seat assembly on the seat post.

Pronto® Series 50 Part No. 1125075

SECTION 6—VAN SEAT

NOTE: If necessary, slightly twist seat assembly back and forth to lock it in place.

3. Release the seat lever.

4. Pull the seat assembly up to ensure that it is locked in place.

5. Connect the joystick. Refer to Disconnecting/Connecting the Joystick

Seat

Assembly

Seat Post

Seat Lever

NOTE: Office style van seat
is shown. Standard van seat
installs the same way.

on page 123.

FIGURE 6.4 Removing/Installing the Seat Assembly

Adjusting Seat Depth

NOTE: For this procedure, refer to FIGURE 6.5 on page 52.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly

2. Perform one of the following:

• For Standard Van Seat -

i. Remove the seat base from the seat assembly. Refer to Adjusting Seat Position

on Seat Base on page 56.

ii. Go to STEP 3.

• For Office Style Seat - Go to STEP 3.

3. Remove the six mounting screws located under the seat that secure the seat back
assembly in place.

4. Adjust seat back assembly to desired position and reinstall the six mounting screws.
Securely tighten.

on page 50.

Part No. 1125075 51 Pronto® Series

SECTION 6—VAN SEAT

NOTE: Refer to Detail “A” of FIGURE 6.5 for proper seat depth positions. For example, to achieve
maximum seat depth, the front mounting hole on the seat back bracket aligns with the third hole
on the seat base.

5. Perform one of the following:

• For Standard Van Seat -

i. Install the seat base onto the seat assembly. Refer to Adjusting Seat Position on

Seat Base on page 56.

ii. Go to STEP 6.

• For Office Style Seat - Go to STEP 6.

6. Reinstall the seat base onto the seat assembly. Refer to Adjusting Seat Position on Seat
Base on page 56.

7. Reinstall the seat. Refer to Removing/Installing the Seat Assembly

Seat Back Bracket

Seat

Base

Mounting

Holes

Seat Back

NOTE: Office style van seat is shown.
Standard van seat adjusts the same way.

Mounting Screws

DETAIL “A” - SEAT DEPTH POSITIONS

Minimum Seat Depth

Seat Depth Seat Size

16 inch 16 X 18 inch

16 inch 18 X 18 inch

18 inch 20 X 20 inch

18 inch 22 X 20 inch

Middle Seat Depth

Seat Depth Seat Size

17 inch 16 X 18 inch

17 inch 18 X 18 inch

19 inch 20 X 20 inch

19 inch 22 X 20 inch

Maximum Seat Depth

Seat Depth Seat Size

18 inch 16 X 18 inch

on page 50.

18 inch 18 X 18 inch

20 inch 20 X 20 inch

20 inch 22 X 20 inch

FIGURE 6.5 Adjusting Seat Depth

Pronto® Series 52 Part No. 1125075

SECTION 6—VAN SEAT

Adjusting the Seat Height

M50/M51 Wheelchairs

NOTE: For this procedure, refer to FIGURE 6.6.

NOTE: The seat can be adjusted to five height positions in 1-inch increments.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 50.

2. Remove the mounting screw that secures the seat post to the support tube.

 WARNING

Refer to the table in FIGURE 6.8 on page 57 for proper seat post mounting
positions. For users over 220 lbs - Mounting holes 3, 4 and 5 (in FIGURE 6.6) MUST
be used with the seat in the 1-inch back position (FIGURE 6.8). Refer to Adjusting
Seat Position on Seat Base on page 56.

3. Adjust the seat post to desired mounting position.

4. Reinstall mounting screw. Securely tighten.

5. Reinstall the seat. Refer to Removing/Installing the Seat Assembly on page 50.

Seat Post

Support Tube

Mounting Screw

1
2
3

4
5

Mounting Positions

NOTE: Batteries and shrouds
not shown for clarity.

FIGURE 6.6 Adjusting the Seat Height - M50/M51 Wheelchairs

Part No. 1125075 53 Pronto® Series

SECTION 6—VAN SEAT

M61 Wheelchairs

NOTE: For this procedure, refer to FIGURE 6.7 on page 55.
NOTE: Seat height can be increased by one or two inches. Use the chart to determine the desired

height of the seat.

INCREASE IN SEAT

HEIGHT

1 inch 1 2

2 inch 2 4

SETS OF SEAT

SPACERS

TOTAL NUMBER OF

SPACERS

LENGTH OF MOUNTING

SCREWS

2½-inches (Office Style Van Seat)

2-inches (Standard Van and ASBA Seat)

3½-inches (Office Style Van Seat)

3-inches (Standard Van and ASBA Seat)

NOTE: A maximum of two sets of spacers can be installed.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 50.

2. Perform one of the following:

• For Standard Van Seats - Remove the four mounting screws, washers, and locknuts

securing the seat pivot and four 1-inch adjustment spacers to the seat mounting
bracket.

• For Office Style Van Seats - Remove the four mounting screws and washers securing

the seat pivot and four 1-inch adjustment spacers to the seat base.

3. Perform one of the following:

• To Reduce Seat Height by One Inch - Remove one set of 1-inch adjustment spacers

to achieve desired height.

• To Reduce Seat Height by Two Inches - Remove both sets of 1-inch adjustment

spacers to achieve desired height.

4. Perform one of the following:

NOTE: The seat comes installed with four 1-inch spacers secured by either 3-inch or 3½-inch
mounting screws. 1-inch, 2-inch, and 2½-inch mounting screws are supplied with the seat.

• For Seat Height Reduced by One Inch -

i. Align the mounting holes on the seat pivot with the mounting holes on the

adjustment spacers and either the seat mounting bracket on standard van seats
or the seat base on office style van seats.

ii. Install the seat adapter to seat base using the 2-inch mounting screws and

existing washers and locknuts (if required). Securely tighten.

• For Seat Height Reduced by Two Inches -

i. Align the mounting holes on the seat pivot with the mounting holes on the

adjustment spacers and either the seat mounting bracket on standard van seats
or the seat base on office style van seats.

ii. Install the seat adapter to seat base using the 1-inch mounting screws and

existing washers and locknuts (if required). Securely tighten.

5. Reinstall the seat. Refer to Removing/Installing the Seat Assembly

on page 50.

Pronto® Series 54 Part No. 1125075

SECTION 6—VAN SEAT

CAUTION

Spacers should be placed in orientation shown, otherwise they will interfere with
the seat lever.

Seat

Base

1-inch

Adjustment

Spacers

Seat Pivot

Mounting

Screws

Office Style Van Seat

1-inch

Adjustment

Spacers

Washers

Locknuts

1-inch

Adjustment

Spacers

Seat Pivot

Standard Van Seat

Seat Mounting

Bracket

1-inch

Adjustment

Spacers

Washers

Mounting

Screws

NOTE: Three-inch and three-and-a-half mounting screws shown.
One-inch and two-inch mounting screws are supplied with the seat.

FIGURE 6.7 Adjusting the Seat Height - M61 Wheelchairs

Part No. 1125075 55 Pronto® Series

SECTION 6—VAN SEAT

Adjusting Seat Position on Seat Base

 WARNING

Refer to the table in FIGURE 6.8 for proper seat post mounting positions. For users
over 220 lbs - seat MUST be in the 1-inch back position (FIGURE 6.8) when using
seat post mounting holes 3, 4 and 5 (FIGURE 6.6). Refer to Adjusting the Seat
Height on page 53.

NOTE: For this procedure, refer to FIGURE 6.8 on page 57.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 50.

2. Remove the four mounting screws and washers securing the seat pivot to the seat base
(FIGURE 6.8).

3. Separate the seat pivot from the seat base.

4. Refer to FIGURE 6.8 to determine the correct mounting holes to achieve the desired
seat position.

5. Align the mounting holes on the seat pivot (determined in STEP 4) with the mounting
holes on the seat base.

6. Using the four mounting screws and washers, secure the seat base to the seat
assembly. Securely tighten.

7. Reinstall the seat. Refer to Removing/Installing the Seat Assembly on page 50.

Pronto® Series 56 Part No. 1125075

SECTION 6—VAN SEAT

Seat

Assembly

Seat Base

Washers

Bolts

NOTE: Office style van seat is
shown. Standard van seat
adjusts the same way.

DETAIL “A” - SEAT POSITION

Front of Seat

I-inch Back

Seat Position

Standard

Seat

I-inch Back

Seat Position

Standard

Seat

Position

Position

I-inch Forward

I-inch

Seat Position*

Forward

Position*

I-inch Back

Seat Position

I-inch Back

Seat Position

Standard

Standard

Seat

Position

I-inch Forward

Position*

Rear of Seat

I-inch Forward

Position*

Seat

Position

*NOTE: For users over 220 lbs - DO NOT use 1-inch
forward position.

DETAIL “B” - PROPER SEAT POSITIONS FOR 18-INCH DEEP BACK SETTING

Legend: Y - Use N/A - DO NOT Use

WEIGHT

LIMITATION

300 LBS

220 LBS

150 LBS

SEAT POST

MOUNTING HOLE

1 Y Y N/A

2 Y Y N/A

3 Y N/A N/A

4 Y N/A N/A

5 Y N/A N/A

1YYY

2 Y Y N/A

3 Y N/A N/A

4 Y N/A N/A

5 Y N/A N/A

1YYY

2YYY

3YYY

4YYY

5YYY

1-INCH

BACK

STANDARD 1-INCH

FORWARD

FIGURE 6.8 Adjusting Seat Position on Seat Base

Part No. 1125075 57 Pronto® Series

SECTION 6—VAN SEAT

Replacing the Seat Positioning Strap

 WARNING

ALWAYS wear your seat positioning strap. The seat positioning strap is a
positioning belt only. It is not designed for use as a safety device withstanding high
stress loads such as auto or aircraft safety belts. If signs of wear appear, belt MUST
be replaced IMMEDIATELY.

NOTE: For this procedure, refer to FIGURE 6.9.

1. Remove the two mounting screws that secure the seat positioning straps to the seat
frame.

2. Remove the two halves of the seat positioning strap from the rear seat frame.

3. Reposition the two new seat positioning strap halves underneath seat rails.

4. Reinstall the two mounting screws that secure the seat positioning straps to the seat
frame. Securely tighten.

Seat

Seat Lever

Seat Positioning

Strap

Mounting Screws

Seat Positioning

Strap

NOTE: Office style van seat is shown. Standard van seat adjusts the same way.

FIGURE 6.9 Replacing the Seat Positioning Strap

Pronto® Series 58 Part No. 1125075

SECTION 7—ASBA SEAT

SECTION 7—ASBA SEAT

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

Removing/Installing the Seat Assembly

NOTE: For this procedure, refer to FIGURE 7.1 on page 60.

Removing

1. Disconnect the joystick. Refer to Disconnecting/Connecting the Joystick on page 123.

2. Fold down the seat back.

3. Pull the seat lever up and lift the seat assembly up and away from the seat post.

Installing

1. Align the seat pivot with the seat post

2. Pull the seat lever up and lower the seat assembly on the seat post.

NOTE: If necessary, slightly twist seat assembly back and forth to lock it in place.

3. Release the seat lever.

4. Pull the seat assembly up to ensure that it is locked in place.

5. Connect the joystick. Refer to Disconnecting/Connecting the Joystick on page 123.

Part No. 1125075 59 Pronto® Series

SECTION 7—ASBA SEAT

Seat

Assembly

Seat Lever

FIGURE 7.1 Removing/Installing the Seat Assembly

Seat Post

Adjusting the Seat Height

M50/51 Wheelchairs Only

NOTE: For this procedure, refer to FIGURE 7.2 on page 61.

NOTE: The seat can be adjusted to five height positions in 1-inch increments.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 59.

2. Remove the mounting screw that secures the seat post to the support tube.

 WARNING

Refer to the table in FIGURE 7.2 on page 61 for proper seat post mounting
positions. For users over 220 lbs - Mounting holes 3, 4 and 5 (in FIGURE 7.2) MUST
be used with the seat in the 1-inch back position (FIGURE 7.2). Refer to Adjusting
the Seat Position on page 65.

3. Adjust the seat post to desired mounting position.

Pronto® Series 60 Part No. 1125075

SECTION 7—ASBA SEAT

4. Reinstall mounting screw. Securely tighten.

5. Reinstall the seat. Refer to Removing/Installing the Seat Assembly on page 59.

Seat Post

Support Tube

Mounting Screw

NOTE: Batteries and shrouds
not shown for clarity.

WEIGHT

LIMITATION

SEAT POST

MOUNTING HOLE

1-INCH

BACK

1
2
3

4
5

Mounting Positions

SEAT DEPTH

STANDARD 1-INCH

FORWARD

300 LBS

220 LBS

150 LBS

1 Y Y N/A

2 Y Y N/A

3 Y N/A N/A

4 Y N/A N/A

5 Y N/A N/A

1YYY

2 Y Y N/A

3 Y N/A N/A

4 Y N/A N/A

5 Y N/A N/A

1YYY

2YYY

3YYY

4YYY

5YYY

FIGURE 7.2 Adjusting the Seat Height - M50/51 Wheelchairs Only

Part No. 1125075 61 Pronto® Series

SECTION 7—ASBA SEAT

M61 Wheelchairs

NOTE: For this procedure, refer to FIGURE 7.3 on page 63.

NOTE: The seat comes installed with two sets of two 1-inch spacers. To reduce the seat height by
1 inch, one set of the 1-inch spacers MUST be removed. To reduce the seat height by 2 inches, both
sets of the 1-inch spacers MUST be removed.

1. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 59.

2. Remove the four mounting screws, washers, and locknuts securing the seat pivot and
four 1-inch adjustment spacers to the seat frame plate.

3. Perform one of the following:

• To Reduce Seat Height by 1 Inch - Remove one set of 1-inch adjustment spacers to

achieve desired height.

• To Reduce Seat Height by 2 Inches - Remove both sets of 1-inch adjustment spacers

to achieve desired height.

4. Perform one of the following:

NOTE: The seat comes installed with four spacers secured by 3-inch mounting screws. 1-inch and
2-inch mounting screws are supplied with the seat.

• For Seat Height Reduced by 1 Inch -

i. Align the mounting holes on the seat pivot with the mounting holes on the

adjustment spacers and the seat frame plate.

ii. Install the seat adapter to seat frame plate using the 2-inch mounting screws

and the existing washers and locknuts. Securely tighten.

• For Seat Height Reduced by 2 Inches -

i. Align the mounting holes on the seat pivot with the mounting holes on the

adjustment spacers and the seat frame plate.

ii. Install the seat adapter to seat frame plate using the 1-inch mounting screws

and the existing washers and locknuts. Securely tighten.

5. Reinstall the seat. Refer to Removing/Installing the Seat Assembly on page 59.

Pronto® Series 62 Part No. 1125075

Mounting Screws

SECTION 7—ASBA SEAT

Seat Frame Plate

Seat Frame

1-inch Adjustment

Spacers

1-inch Adjustment

Spacers

Seat Pivot

Washers

Locknuts

FIGURE 7.3 Adjusting the Seat Height - M61 Wheelchairs

Removing/Installing the Seat Pan

NOTE: For this procedure, refer to FIGURE 7.4 on page 64.

NOTE: Note of the position and orientation of the mounting hardware, seat positioning straps and
quick release pin tabs for installing of the seat pan.

NOTE: Reverse this procedure to install the seat pan. Torque locknuts to 75-inch-lbs.

1. Perform one of the following:

• Remove seating system. Refer to manufacturers seating system installation

instructions.

• Remove cushion by pulling up to release hook and loop strips. Remove cushion

from seat pan.

2. Remove the two rear mounting screws, quick release pin tabs, spacers and locknuts
that secure the seat pan and seat positioning straps to the seat frame.

NOTE: The two front mounting screws, spacers and locknuts also secure the front rigging support
tubes to the seat frame.

3. Remove the four mounting screws, locknuts and four spacers securing the seat pan to
the seat frame (FIGURE 7.4).

4. Remove the seat pan from the seat frame.

Part No. 1125075 63 Pronto® Series

SECTION 7—ASBA SEAT

Mounting Screws

Seat

Positioning

Strap

Tab

Locknut

Quick Release Pin

FIGURE 7.4 Removing/Installing the Seat Pan

Adjusting the Seat Width

Seat Pan

Seat Frame

Spacer

Locknut

The ASBA seat width cannot be adjusted and the seat frame must be replaced to achieve
a change in seat width for the user. Refer to Removing/Installing the Seat Pan on page 63.

Removing/Installing the Seat Frame

NOTE: For this procedure, refer to FIGURE 7.5 on page 65.

Removing

1. Remove the accessories installed in the accessory tube. Refer to Accessories on
page 128.

2. Remove the arms. Refer to Removing/Installing Flip Back Armrest

3. Remove the four hex screws and locknuts securing the seat frame to the seat frame
plate.

4. Remove the seat frame from the seat frame plate.

Installing

1. Position the seat frame onto the seat frame plate.

on page 47.

2. Secure the seat frame to the seat frame plate using the four hex screws and locknuts.
Torque to 13 ft-lbs.

3. Install the arms. Refer to Removing/Installing Flip Back Armrest

Pronto® Series 64 Part No. 1125075

on page 47.

SECTION 7—ASBA SEAT

4. Install the accessories, if necessary. Refer to Accessories on page 128.

Seat Frame

Accessory Tube

Hex Screws

Seat Frame Plate

Locknuts

FIGURE 7.5 Removing/Installing the Seat Frame

Adjusting the Seat Position

NOTE: For this procedure, refer to FIGURE 7.6 on page 66.

NOTE: The seat is shipped from the factory in the standard position. The seat can be moved 1-inch
forward or 1-inch rearward. See Detail “A”).

1. Remove the four mounting screws, washers and locknuts securing the seat frame plate
and 1-inch adjustment spacers* to the seat pivot.

*NOTE: M61 wheelchairs may have up to two sets of 1-inch adjustment spacers between the seat
frame plate and the seat pivot.

2. Reposition the seat frame plate, 1-inch adjustment spacers* and seat pivot to align the
mounting holes with the desired seat adjustment position (Detail “A”).

3. Secure the seat frame plate and 1-inch adjustment spacers* to the seat pivot using the
four mounting screws, washers and locknuts. Torque to 13 ft-lbs ± 20%.

Part No. 1125075 65 Pronto® Series

SECTION 7—ASBA SEAT

Mounting Screws

1-inch

Adjustment

Spacers

Seat Frame Plate

1-inch

Adjustment

Spacers

Seat Pivot

Washers

Locknuts

DETAIL “A” - SEAT ADJUSTMENT

POSITIONS

1-inch

Forward

Position

Standard

Position

1-inch

Rearward

Position

FIGURE 7.6 Adjusting the Seat Position

Removing/Installing the Seat Positioning Strap

NOTE: For this procedure, refer to FIGURE 7.7 on page 67.

1. Remove the seat cushion from the seat pan.

2. Move the flip back armrests out of the way.

3. Remove the two mounting screws, quick release pin tabs, spacers, and locknuts that
secure the seat pan and seat positioning straps to the seat frame.

4. Remove the two halves of the seat positioning strap from the rear seat frame.

5. Reposition the two new seat positioning strap halves underneath seat rails.

6. Reinstall the two mounting screws, quick release pin tabs, spacers, and locknuts that
secure the seat pan and seat positioning straps to the seat frame and torque to
75 in-lbs.

7. Reinstall the seat cushion onto the seat pan.

Pronto® Series 66 Part No. 1125075

Mounting

Screw

SECTION 7—ASBA SEAT

Rear of Seat

Frame

Seat Positioning Strap

Quick Release Pin Tab

Seat Rail

Spacer

Locknut

Seat Pan

Front of Seat

Frame

FIGURE 7.7 Removing/Installing the Seat Positioning Strap

Removing/Installing the Back Upholstery

NOTE: The back canes MUST be removed when removing/installing the back upholstery. Refer to
Removing/Installing/Changing the Back Cane Height on page 67.

Removing/Installing/Changing the Back Cane Height

NOTE: For this procedure, refer to FIGURE 7.8 on page 70.

NOTE: If changing the back height, new back upholstery may be needed as well. Refer to the
following chart to determine if new back upholstery is needed:

NOTE BACK UPHOLSTERY

HEIGHT

If back height required is within the range of the original back upholstery
height, only new back canes will be needed.

If the back height required is NOT within the range of the original back uphol­stery height, new back upholstery, and back canes will be required

NOTE: Existing hardware and inserts will be reused.

NOTE: Take note of position and orientation of mounting hardware for reinstallation.

Removing

1. Remove flip back armrest from the wheelchair. Refer to Removing/Installing Flip Back
Armrest on page 47.

16 to 17 inches

18 to 19 Inches

20 inches

21 to 22 inches

NOTE: Note the back angle before disassembly for proper reinstallation.

Part No. 1125075 67 Pronto® Series

SECTION 7—ASBA SEAT

2. On the side of wheelchair with armrest removed, remove one of the mounting screws,
washer, coved washer and locknut that secures the back cane to the seat frame.

3. Cut the tie-wraps that secure the bottom of the existing back upholstery to the seat
frame.

4. Thread the mounting screw removed in STEP 2 through the back cane from the inside
of the wheelchair to hold the insert in place.

5. Remove the remaining mounting screw, washer, coved washer and locknut that
secures the back cane to the seat frame.

6. Repeat STEPS 1-4 for the opposite side of the wheelchair and remove back assembly
from wheelchair.

7. Remove the two mounting screws and washers that secure the existing back
upholstery to the back canes.

8. If present, release hook and loop strap securing the back upholstery to the back canes.

9. Remove the two mounting screws used to keep inserts in the back canes in STEP 3. Set
mounting screws and inserts aside.

10. Loosen, but DO NOT remove, the two mounting screws and locknuts securing the
spreader bar to the back canes.

11. Grasp the hand grip and slide the back cane out of the spreader bar (if applicable) and
the back upholstery.

Installing

NOTE: If replacing back upholstery, discard existing back upholstery and perform this procedure
using new back upholstery.

NOTE: If replacing back canes, discard existing back canes and perform this procedure using new
back canes.

NOTE: Spreader bar is required on ALL back heights between 20-24-inches. Spreader bar is
required on back heights 16, 17, 18, or 19 ONLY if the width or depth of the chair exceeds 19 inches.
Refer to FIGURE 7.8 for proper spreader bar location on back canes.

1. Slide one back cane into back upholstery and through spreader bar (if applicable).

2. Position insert into bottom of back cane.

3. From inside of wheelchair, thread a mounting screw through the back cane to hold the
insert in position when installing the back assembly.

4. Repeat STEPS 1-3 for remaining back cane.

NOTE: If changing the back angle, refer to Adjusting the Back Angle

on page 71 to determine the

proper mounting holes for the desired back angle.

5. Position back assembly between the back angle plates (FIGURE 7.8).

6. On one side of wheelchair, align back cane mounting holes with the desired mounting
holes of the back angle plate.

Pronto® Series 68 Part No. 1125075

SECTION 7—ASBA SEAT

7. Remove the two mounting screws used to keep inserts in the back canes in STEP 3. Set
mounting screws and inserts aside.

 WARNING

The back canes MUST be fastened securely to the seat frame BEFORE using the
wheelchair. Torque to 75-inch-lbs.

8. From outside of wheelchair, secure the back cane to the back angle plate using two
mounting screws, washers, coved washers and locknuts (FIGURE 7.8). Use Loctite 242
and torque to 75-inch-lbs.

9. Repeat STEPS 6-8 on opposite side of wheelchair.

10. Secure the top of the back upholstery to the back canes with the two existing mounting
screws.

11. Using two new tie-wraps, secure bottom of back upholstery to the seat frame.

12. If necessary, reposition the spreader bar at the correct height for the corresponding
back height and torque the mounting hardware to 60-inch-lbs (FIGURE 7.8).

13. If present, secure back upholstery hook and loop straps around back canes.

14. Reinstall the flip back armrest onto the wheelchair. Refer to Removing/Installing Flip
Back Armrest on page 47.

Part No. 1125075 69 Pronto® Series

SECTION 7—ASBA SEAT

Back Canes

Screws with

Washers

Back Upholstery

Coved

Washers

Locknuts

NOTE: When replacing the back upholstery,
back assembly or changing back height, follow
these guidelines for spreader bar height:

BACK HEIGHT *SPREADER BAR

HEIGHT

16-inches 5-inches

17-inches 5-inches

18-19-inches 7-inches

20-22-inches 7-inches

*NOTE: Height of spreader bar from bottom
of back canes to top of spreader bar clamp.

Spreader Bar

Locknut

Back Insert

Back Angle Plate

Mounting Holes

Screw with Lug

Mounting Screws

Washers

Seat Frame

FIGURE 7.8 Removing/Installing the Back Upholstery

Pronto® Series 70 Part No. 1125075

SECTION 7—ASBA SEAT

Adjusting the Back Angle

NOTE: For this procedure, refer to FIGURE 7.9 on page 72.

1. Remove the flip back armrests from the wheelchair. Refer to Removing/Installing Flip
Back Armrest on page 47.

2. Remove the mounting screw, washer, coved washer and locknut from the top
mounting hole of back angle plate and back cane (FIGURE 7.9).

NOTE: To avoid losing the insert in each back cane, thread the mounting screw through the cane
from the inside of wheelchair to hold the insert in place.

3. Remove the mounting screw, washer, coved washer and locknut from the bottom
mounting hole of the back angle plate and back cane.

4. Reposition the back canes into the correct mounting holes of the back angle plate to
obtain a back angle between 80° and 100° in 5° increments.

5. Starting with the bottom mounting hole, use the two mounting screws, washers,
coved washers and locknuts to secure the back cane with insert to the back angle plate.

6. Torque mounting screws to 75-inch-lbs.

7. Reinstall the flip back armrests onto the wheelchair. Refer to Removing/Installing Flip
Back Armrest on page 47.

Part No. 1125075 71 Pronto® Series

SECTION 7—ASBA SEAT

ANGLE BACK CANE MOUNTING HOLE BACK ANGLE PLATE HOLE

80°

85°

90

95°

100°

Top

Bottom

Back

Cane

Top Front

Bottom Rear

Back Angle

Plate

Top

Back

Cane

2nd From

Bottom

Top

O

Back

Cane

Bottom

Top Front

Bottom Center

Back Angle

Plate

Top Front

Bottom Front

Back Angle

Plate

Top

2nd From

Bottom

Top

Bottom

Back

Cane

Back

Cane

Top Center

Bottom Front

Back Angle

Plate

Top Rear

Bottom Front

Back Angle

Plate

FIGURE 7.9 Adjusting the Back Angle

Pronto® Series 72 Part No. 1125075

SECTION 8—FRONT RIGGINGS/FOOTBOARD

SECTION 8—FRONT RIGGINGS/
FOOTBOARD

 WARNING

After ANY adjustments, repair or service and before use, make sure all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

DO NOT stand on the flip-up footboard or front riggings. When getting in or out of
the wheelchair, make sure that the flip-up footboard or footplates are in the upward
position.

Limited Clearance Between Footboard and Caster - The user’s feet MUST remain
on the footboard while operating the chair. If the user’s feet are allowed to rest off
the side of the footboard they may come in contact with the caster possibly
resulting in injury.

Installing/Removing Front Riggings

CAUTION

If front riggings are used, then the seat MUST be adjusted to the highest mounting
position - otherwise damage may occur.

NOTE: For this procedure, refer to FIGURE 8.1 on page 74.

Installing

1. If necessary, remove the footboard. Refer to Removing/Installing the Footboard
Assembly on page 78.

2. Turn front rigging to the side (open footplate is perpendicular to wheelchair) and
position mounting holes in the front rigging hinge plates with hinge pins on the
wheelchair frame.

3. Install the front rigging hinge plates onto the hinge pins on the wheelchair frame.

4. Push the front rigging towards the inside of the wheelchair until it locks into place.

NOTE: The footplate will be on the inside of the wheelchair when locked in place.

5. Repeat STEPS 1-4 for opposite side of wheelchair.

Part No. 1125075 73 Pronto® Series

SECTION 8—FRONT RIGGINGS/FOOTBOARD

Removing

1. Push the front rigging release lever
inward and rotate the footrest outward.

2. Lift up on front rigging and remove
from the wheelchair.

3. Repeat STEPS 1-2 for opposite side of
wheelchair.

Adjusting Footrest Height

Model PHWH93 Front Riggings

Telescoping Front Rigging Support

Hinge

Pins

Front Rigging

Release Lever

Front

Rigging

Hinge

Plate

FIGURE 8.1 Installing/Removing Front

Riggings

NOTE: For this procedure, refer to FIGURE 8.2.

1. Remove any accessory from the front rigging(s).

2. Remove the front rigging from the wheelchair. Refer to Installing/Removing Front
Riggings on page 73.

NOTE: Lay front rigging on a flat surface to simplify procedure.

3. Remove the hex bolt, coved washers and locknut that secure the lower footrest to the
footrest support.

4. Reposition the lower footrest to the
desired height.

5. Reinstall hex bolt, coved washers and

Locknut

Footrest Support

Coved Washer

locknut that secure lower footrest to
footrest support. Tighten securely.

6. Repeat STEPS 1-5 for the opposite side
of the wheelchair footrest, if necessary.

7. Reinstall the footrest(s) onto the
wheelchair. Refer to Installing/
Removing Front Riggings on page 73.

FIGURE 8.2 Model PHWH93 Front

Coved

Washer

Hex Bolt

Lower

Footrest

Riggings

Pronto® Series 74 Part No. 1125075

SECTION 8—FRONT RIGGINGS/FOOTBOARD

Model PH904A and PHAL4A Front Riggings

NOTE: For this procedure, refer to FIGURE 8.3.

1. Loosen, but DO NOT remove the lug
bolt and locknut that secure the lower
footrest to the footrest support.

Footrest
Support

Locknut

Lower Footrest

2. Reposition the lower footrest to the
desired height.

3. Securely tighten the lug bolt and

Lug Bolt

locknut that secure the lower footrest to
the footrest support.

4. Repeat STEPS 1-3 for the opposite side

NOTE: PH904A style front rigging shown.
PHAL4A front rigging adjust the same way.

of the wheelchair footrest, if necessary.

FIGURE 8.3 Model PH904A and PHAL4A

Front Riggings

Replacing Heel Loops

NOTE: For this procedure, refer to FIGURE 8.4.

1. Note the position of hex bolt, coved washers and locknut for reinstallation.

2. Remove the hex bolt, coved washers and locknut that secure the lower footrest to the
footrest support.

3. Remove the lower footrest.

4. Remove the mounting screw, spacer
and locknut that secure the existing
heel loop to the lower footrest.

5. Slide the existing heel loop off the
lower footrest.

6. Replace heel loop.

7. Reverse STEPS 1-6 to reassemble.

NOTE: When securing heel loop to lower
footrest, tighten the mounting screw and
locknut until the spacer is secure.

Footrest Support

Locknut

Coved

Washer

Lower Footrest

Locknut

Hex Bolt

Mounting

Screw

Spacer

Heel

Loop

FIGURE 8.4 Replacing Heel Loops

Part No. 1125075 75 Pronto® Series

SECTION 8—FRONT RIGGINGS/FOOTBOARD

Raising/Lowering Elevating Front Riggings

NOTE: For this procedure, refer to FIGURE 8.5.

1. Perform one of the following:

• Raising - Pull back on the release

lever and raise front rigging to the
desired height.

• Lowering - Support front rigging

with one hand away from the
release lever. Push release lever
downward with other hand.

FIGURE 8.5 Raising/Lowering Elevating

Front Riggings

Release

Lever

Adjusting/Replacing Telescoping Front Rigging
Supports

Van Seats

NOTE: For this procedure, refer to FIGURE 8.6 on page 77.

NOTE: When adjusting the telescoping front rigging support depth, ensure the footplate does not
interfere with the caster wheel rotation.

NOTE: Telescoping front rigging supports may be extended up to 2-inches from the wheelchair
frame in 1-inch increments. This adjustment does not affect seat depth.

NOTE: When installing the front rigging support tubes, ensure that the hinge pins are on the
outside of the chair facing away from the seat frame.

1. Remove the seat assembly. Refer to Removing/Installing the Seat Assembly on
page 50.

2. Remove the two socket bolts, spacers and locknuts that secure telescoping front
rigging support to the seat frame.

3. Perform one of the following:

• Adjusting - Align the appropriate mounting hole of the telescoping front rigging

support with the front mounting hole in the seat frame tubes to achieve the desired
depth (FIGURE 8.6).

• Replacing - Perform the following:

i. Remove the existing telescoping front rigging support from the wheelchair

frame.

ii. Insert the new telescoping front rigging support into the seat frame.

iii. Align the appropriate mounting hole of the telescoping front rigging support

with the front mounting hole in the seat frame tubes to achieve the desired
depth (FIGURE 8.6).

NOTE: The footplate will be on the inside of the wheelchair when locked in place.

Pronto® Series 76 Part No. 1125075

SECTION 8—FRONT RIGGINGS/FOOTBOARD

4. Using the two socket bolts, spacers and locknuts, secure the telescoping front rigging
support to the seat frame.

5. If necessary, repeat STEPS 2-4 on remaining telescoping front rigging support.

6. Reinstall the seat assembly. Refer to Removing/Installing the Seat Assembly on
page 50.

Mounting

Bolts

Seat

FRONT RIGGING

MODEL

Locknuts

Spacers

STANDARD

POSITION

Inner

Mounting

Holes

Telescoping Front

Rigging Support

Hinge

Pins

8

6

7

5

3

4

Mounting Holes

Not Used

2

1 INCH OUT 2 INCHES OUT

PHW93

PH904A and PHAL4A

Holes

4 and 5

Holes

3 and 4

Holes

5 and 6

Holes

4 and 5

Holes

6 and 7

Holes

5 and 6

FIGURE 8.6 Adjusting/Replacing Telescoping Front Rigging Supports

ASBA Seat

NOTE: For this procedure, refer to FIGURE 8.7 on page 78.

1. Remove the two mounting screws, spacers and locknuts that secure the telescoping
front rigging support to the seat frame.

2. Perform one of the following:

• Slide existing telescoping front rigging support to one of three depth positions.

• Remove existing telescoping front rigging.

Part No. 1125075 77 Pronto® Series

SECTION 8—FRONT RIGGINGS/FOOTBOARD

3. Secure telescoping front rigging at desired depth with existing two mounting screws,
spacers, and locknuts. Securely tighten.

NOTE: The two telescoping front rigging supports can be positioned at different depths.

Mounting

Screws

Spacer

Locknut

Seat

Frame

Depth Mounting

Positions

Spacer

Locknut

Telescoping Front

Rigging Support

Depth Mounting

Positions

FIGURE 8.7 Adjusting/Replacing Telescoping Front Rigging Supports

Removing/Installing the Footboard Assembly

 WARNING

Pinch point may occur when rotating the footboard assembly.

NOTE: For this procedure, refer to FIGURE 8.8 on page 79.

Removing

1. Remove the quick release pin that secures the footboard assembly to the wheelchair
frame by depressing the button while sliding the pin out.

2. Remove the footboard assembly from the wheelchair frame.

Pronto® Series 78 Part No. 1125075

SECTION 8—FRONT RIGGINGS/FOOTBOARD

Installing

 WARNING

Make sure the detent balls of the quick-release pin are fully released beyond the
outer edge of the tube before operating the wheelchair. Otherwise, injury and/or
damage may result.

Keep detent balls clean.

1. Position the footboard assembly onto the wheelchair frame so that the mounting hole
in the wheelchair frame aligns with the desired mounting hole in the footboard
assembly.

2. Install the quick release pin by depressing the button while sliding the pin in. Ensure
that the detent balls of the quick release pin are fully released beyond the outer edge
of the tube (Detail “A” of FIGURE 8.8).

DETAIL “A” - BOTTOM VIEW OF

Top Shroud

FOOTBOARD

Quick Release Pin

Pinch Point

Footboard

Assembly

Mounting Hole

Quick

Release Pin

Detent

Ball

Outer Edge

of Tube

Detent Balls

FIGURE 8.8 Removing/Installing the Footboard Assembly

Adjusting the Footboard Assembly

Angle

NOTE: For this procedure, refer to FIGURE 8.9 on page 80.

1. Loosen the jam nut and set screw located underneath on the backside of the footplate.

2. Adjust the set screw in or out to obtain the desired footboard assembly angle.

3. Thread the jam nut and washer inward until it is flush with the footboard bracket.

4. Securely tighten the jam nut and washer to secure the mounting screw in place.

Part No. 1125075 79 Pronto® Series

SECTION 8—FRONT RIGGINGS/FOOTBOARD

Bottom View of

Footboard

Set Screw, Washer

and Jam Nut

Footboard

Assembly

FIGURE 8.9 Adjusting the Footboard Assembly - Angle

Depth

NOTE: For this procedure, refer to FIGURE 8.10.

1. Remove the quick release pin that secures the footboard assembly to the wheelchair
frame.

 WARNING

Make sure the detent balls of the quick-release pin are fully released and beyond the
outer edge of the tube before operating the wheelchair. Otherwise, injury and/or
damage may result.

Keep detent balls clean.

2. Adjust footboard to one of three mounting positions.

3. Install the quick release pin. Make sure the detent balls of the quick-release pin are
fully released and beyond the outer edge of the tube (Detail “A”).

DETAIL “A” - BOTTOM VIEW OF

FOOTBOARD

Quick Release Pin

Detent Balls

Outer Edge

of Tube

Mounting

Hole

Release Pin

Quick

Top Shroud

Three Depth

Adjustment Holes

Footboard

Assembly

Detent

Ball

FIGURE 8.10 Adjusting the Footboard Assembly - Depth

Pronto® Series 80 Part No. 1125075

SECTION 9—WHEELS

SECTION 9—WHEELS

 WARNING

After ANY adjustments, repair or service and before use, make sure all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

Replacing the Front/Rear Casters

NOTE: For this procedure, refer to FIGURE 9.1.

NOTE: Front and rear casters are replaced in the same manner.

NOTE: When replacing the front/rear casters, it is necessary to brace the caster to prevent
spinning.

1. Remove the mounting screw, two washers and locknut that secures the caster to the
fork.

2. Remove the caster and discard.

3. Secure new caster to fork with existing mounting screw, two washers and locknut.
Securely tighten.

Locknut

Fork

Mounting Screw

Washer

FIGURE 9.1 Replacing the Front/Rear Casters

Washer

Caster

Part No. 1125075 81 Pronto® Series

SECTION 9—WHEELS

Adjusting Caster Assembly

NOTE: For this procedure, refer to FIGURE 9.2.

1. Lift up front edge of the dust cover and remove from head tube.

2. To properly tighten caster assembly and guard against flutter, perform the following
check:

NOTE: Two people are recommended to perform this STEP - one to tip wheelchair back and one to
inspect/adjust the caster assembly.

A. Tip back the wheelchair.

B. Pivot both caster assemblies to top of their arc simultaneously.

C. Let casters drop to bottom of arc (casters should swing once to one-side, then

IMMEDIATELY rest in a straight downward position).

D. Adjust locknuts according to freedom of caster swing.

3. Test wheelchair for maneuverability.

4. Readjust locknuts if necessary, and repeat STEPS 1-3 until correct.

5. Snap dust cover into the caster headtube ensuring that the tabs are under the plastic
side shrouds.

Tabs

Dust Cover

Side Shroud

Locknut

Washer

NOTE: Front caster
shown. Rear caster
installs the same
way.

Caster

Base Frame

Fork

Headtube

Washer

FIGURE 9.2 Adjusting Caster Assembly

Pronto® Series 82 Part No. 1125075

SECTION 9—WHEELS

Removing/Installing the Front/Rear Caster Assemblies

NOTE: For this procedure, refer to FIGURE 9.2.

NOTE: Front and rear caster assemblies are replaced in the same manner.

Removing

1. Remove the dust cover.

2. Remove locknut and washer securing caster assembly to the headtube.

Installing

1. Insert threaded post of caster assembly into headtube.

2. Using washer and locknut, secure caster assembly to head tube.

3. Snap dust cover into the headtube.

Removing/Installing the Front Headtube Assembly

NOTE: For this procedure, refer to FIGURE 9.3.

NOTE: Take note of position and orientation of headtube and mounting hardware for installation.

NOTE: Reverse this procedure to install the front headtube assembly.

1. Remove the dust cover.

2. Remove the two top mounting screws and bushing that secure the headtube to the
walking beam.

3. Remove the two bottom mounting screws and bushing that secure the head tube to
the pivot tube.

4. Remove the headtube from the walking beam and pivot tube.

Dust Cover

Walking

Beam

Top Mounting

Screw

Pivot Tube

Top Mounting

Screw

Bottom

Mounting Screw

Headtube

Bushing

Bottom Mounting

Screw

FIGURE 9.3 Removing/Installing the Front Headtube Assembly

Part No. 1125075 83 Pronto® Series

SECTION 9—WHEELS

Removing/Installing the Drive Wheel

NOTE: For this procedure, refer to FIGURE 9.4 on page 85.

Removing the Drive Wheel

1. Fold down tab of existing locking tab washer (Detail “A” of FIGURE 9.4).

2. Remove mounting bolt and locking tab washer (Detail “B” of FIGURE 9.4). Discard
existing locking tab washer.

3. Remove the wheel from the drive shaft. If necessary, use wheel puller to remove the
drive wheel from the drive shaft.

Installing the Drive Wheel

NOTE: Ensure keystock is in the cutout on the drive shaft (Detail “B” of FIGURE 9.4). The
keystock MUST line up with the wheel hub cutout.

CAUTION

DO NOT apply more than a one-inch (in length) thin film of anti-seize compound to
the drive shaft. Applying more than one-inch (in length) can cause the anti-seize
compound to leak resulting in damage to flooring (carpet, tile, etc.).

1. Apply an anti-seize compound to drive shaft and keystock.

2. Align the keystock in the drive shaft with the cutout in the wheel hub and position the
wheel on to the drive shaft (Detail “B” of FIGURE 9.4).

 WARNING

Failure to properly install locking tab washer can result in wheel separation and
potential user injury or property damage. When replacing wheels ALWAYS use a
new locking tab washer. DO NOT reuse locking tab washers.

NOTE: The locking tab of the locking tab washer MUST be inserted into the cutout in the rim and
hub (Detail “B” of FIGURE 9.4).

3. Using the mounting bolt, washer and new locking tab washer, secure the wheel to the
drive shaft (Detail “B” of FIGURE 9.4).

4. Fold one tab of the locking tab washer up so that the tab rests against one side of the
mounting bolt (Detail “A” of FIGURE 9.4)

Pronto® Series 84 Part No. 1125075

SECTION 9—WHEELS

DETAIL “A”

NOTE: Locking tab washer shown with
all tabs folded down to remove/install the
mounting bolt.

Locking Tab

Washers (Tabs)

Mounting Bolt

Locking Tab

Washer (Tab)

Mounting Bolt

NOTE: Locking tab washer shown with one
tab folded up to secure the mounting bolt.

FIGURE 9.4 Removing/Installing the Drive Wheel

Outer Rim

Cutout

Locking

Tab

Mounting

Bolt

DETAIL “B”

Keystock

Washer

Locking Tab

Washer

Motor and

Gearbox

Drive Shaft

Wheel

Replacing the 2-Piece Wheel Rim and/or the Foam
Filled or Pneumatic Tires

NOTE: For this procedure, refer to FIGURE 9.5 on page 86.

NOTE: When replacing the 2-piece wheel rim, DO NOT remove tire. Replacement 2-piece wheel
rims are shipped assembled with a new tire. Refer to Removing/Installing the Drive Wheel on
page 84 to remove the existing and install the new 2-piece wheel rim and tire.

 WARNING

When replacing the hub of a pneumatic tire, ALWAYS deflate tire before
removing/installing hub - otherwise, injury or damage may occur. Failure to observe
this warning can result in sudden, violent rim separation and possible injury.

1. Deflate existing pneumatic tire.

2. Remove the four existing mounting screws, locknuts and washers that secure the
existing outer rim and inner rim.

3. Separate the two halves of the rim and remove the existing tire. Discard existing tire.

NOTE: When installing the new pneumatic tire, if necessary, place the inner tube into the tire.

NOTE: When installing the outer rim into a pneumatic tire ensure the valve stem of the inner tube
protrudes through the stem opening in the outer rim.

4. Insert the outer rim and inner rim into the new/existing tire.

5. Insert the hub into the inner rim and align the four mounting holes of the hub, inner
rim and outer rim.

Part No. 1125075 85 Pronto® Series

SECTION 9—WHEELS

6. Using the four mounting screws, lock washers and hex nuts, secure the outer rim to
the inner rim and hub. Torque hex nuts to 160 - 200-inch-lbs.

7. If pneumatic, fill tire to correct air pressure as noted on tire side wall.

Washers

Inner Rim

Outer Rim

Mounting Screws

Wheel Hub Cutout

Tire

Locknuts

Hub

FIGURE 9.5 Replacing the 2-Piece Wheel Rim and/or the Foam Filled or Pneumatic Tires

Pronto® Series 86 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

SECTION 10—SHROUDS AND
FRAME

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Before performing any maintenance, adjustment or service verify that On/Off
switch on the joystick is in the Off position.

To prevent cracking the plastic shroud material, DO NOT overtighten the
mounting screws.

Removing/Installing the Top Shroud

NOTE: For this procedure, refer to FIGURE 10.1 on page 88.

Removing

1. Disconnect the joystick. Refer to Disconnecting/Connecting the Joystick on page 123.

2. M61 Wheelchairs Only - Remove the joystick cable from the clip on the top shroud.

3. Remove the seat. Refer to Removing/Installing the Seat Assembly on page 50.

4. Remove the top shroud by pulling it up off the base frame.

Installing

1. Pull joystick cable through the center hole in the top shroud.

2. Place the top shroud on the base frame and push downward to engage the hook and
loop straps.

3. M61 Wheelchairs Only - Secure the joystick cable using the clip on the top shroud.

4. Install the seat assembly. Refer to Removing/Installing the Seat Assembly

5. Connect the joystick. Refer to Disconnecting/Connecting the Joystick

on page 50.

on page 123.

Part No. 1125075 87 Pronto® Series

SECTION 10—SHROUDS AND FRAME

DETAIL “A” - M61 TOP SHROUD

Center

Hole in

Top

Shroud

Joystick Cable

and Connector

Base

Frame

Hook and

Loop
Strap

Top

Shroud

Hook and

Loop Strap

Front

Shroud

NOTE: Batteries not
shown for clarity.

FIGURE 10.1 Removing/Installing the Top Shroud

Removing/Installing the Side Shrouds

NOTE: For this procedure, refer to FIGURE 10.2 on page 89.

Clip

Removing

1. Remove the two screws securing the side shroud to the frame.

2. Remove the side shroud from the frame.

Installing

1. Position the side shroud onto the frame.

2. Align the shroud mounting holes with the mounting holes in the frame.

3. Secure the side shroud to the frame using the two screws. DO NOT overtighten.

Pronto® Series 88 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

Screws

Shroud Mounting Holes

Frame

FIGURE 10.2 Removing/Installing the Side Shrouds

Removing/Installing the Front Shroud

Side

Shroud

NOTE: For this procedure, refer to FIGURE 10.3 on page 90.

Removing

1. Remove the two screws securing the top of the front shroud to the frame.

2. Remove the front shroud fo the frame.

Installing

1. Insert the tabs at the bottom of the front shroud into the slots in the bottom of the
frame.

2. Secure the top of the front shroud to the frame using the two screws. DO NOT
overtighten.

Part No. 1125075 89 Pronto® Series

SECTION 10—SHROUDS AND FRAME

Frame

Screw

Slots

Front

Shroud

Screw

Tabs

FIGURE 10.3 Removing/Installing the Front Shroud

Removing/Installing the Inner Shrouds

NOTE: For this procedure, refer to FIGURE 10.4 on page 91.

Removing

1. Remove the walking beam. Refer to Removing/Installing the Walking Beam on
page 93.

2. Remove the large screw and locknut securing the inner shroud to the walking beam.

3. Remove the small screw securing the the inner shroud to the side shroud (if present).

4. Remove the inner shroud.

Installing

1. Position the inner shroud on the walking beam.

2. Use the small screw to secure the inner shroud to the side shroud. DO NOT
overtighten.

3. Insert the large screw through the large mounting hole in the inner shroud and the
walking beam.

4. Use the locknut to secure the inner shroud to the walking beam. DO NOT overtighten.

5. Install the walking beam. Refer to Removing/Installing the Walking Beam on page 93.

Pronto® Series 90 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

Side

Shroud

Walking

Beam

Small Screw

Large Screw

Small

Mounting

Hole

Inner

Shroud

Large

Mounting

Hole

FIGURE 10.4 Removing/Installing the Inner Shrouds

Removing/Installing the Pivot Tube

NOTE: For this procedure, refer to FIGURE 10.5 on page 92.

Removing

1. Remove the front headtube assembly. Refer to Removing/Installing the Front
Headtube Assembly on page 83.

2. Remove the side shroud. Refer to Removing/Installing the Side Shrouds

on page 88.

3. remove the locknut, two small washers and large washer securing the rear of the pivot
tube to the threaded post.

4. Remove the pivot tube from the frame.

NOTE: The front and rear bushings may fall out of the pivot tube when it is removed. Retain these
for installation.

Part No. 1125075 91 Pronto® Series

SECTION 10—SHROUDS AND FRAME

Installing

1. If necessary, insert one bushing into each end of the pivot tube.

2. Position the pivot tube onto the pivot post.

NOTE: Ensure the opposite end of the pivot tube is parallel to the end of the walking beam. If
necessary, reposition the pivot tube.

3. Secure the end of the pivot tube to the pivot post using the two small washers, the
large washer and the locknut. Torque to 90 in-lbs ± 20%.

4. Install the front headtube assembly. Refer to Removing/Installing the Front Headtube
Assembly on page 83.

Small Washers

Locknut

Walking Beam

Pivot Post

Large Washer

Pivot Tube

Bushings

FIGURE 10.5 Removing/Installing the Pivot Tube

Pronto® Series 92 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

Removing/Installing the SureStep Spring

NOTE: For this procedure, refer to FIGURE 10.6.

Removing

1. Unhook the SureStep spring from the hooks on the walking beam and the frame.

Installing

1. Position the SureStep spring on the hook on the frame.

2. Position the top of the SureStep spring onto the hook on the walking beam.

Walking

Beam

SureStep Spring

Hook

Hook

Frame

FIGURE 10.6 Removing/Installing the SureStep Spring

Removing/Installing the Walking Beam

NOTE: For this procedure, refer to FIGURE 10.7 on page 94.

Removing

1. Remove the front headtube assembly. Refer to Removing/Installing the Front
Headtube Assembly on page 83.

2. Unhook the top of the SureStep spring from the hook on the walking beam.

3. Remove the shoulder screw and locknut securing the walking beam to the frame
bracket.

4. Remove the walking beam from the frame.

Installing

1. Position the walking beam into the frame bracket.

2. Secure the walking beam to the frame using the shoulder screw and locknut. Torque
to 23 ft-lbs ± 20%.

Part No. 1125075 93 Pronto® Series

SECTION 10—SHROUDS AND FRAME

3. Hook the top of the SureStep spring to the hook on the walking beam.

4. Install the front headtube assembly. Refer to Removing/Installing the Front Headtube
Assembly on page 83.

Locknut

Hook

Shoulder Screw

Frame Bracket

Walking Beam

SureStep Spring

FIGURE 10.7 Removing/Installing the Walking Beam

Removing/Installing the Elevate Actuator

NOTE: For this procedure, refer to FIGURE 10.8 on page 96.

NOTE: This procedure applies to M61 wheelchairs only.

Removing

1. Remove the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

2. Remove the batteries. Refer to Removing/Installing Batteries from/into Battery Tray
on page 99.

3. Disconnect the actuator connector from the controller connector (Detail “A”).

on page 50.

4. Cut the three tie-wraps securing the actuator cable to the frame (Detail “A”).

5. Remove the four hex screws and washers securing the elevate actuator to the bottom
of the frame.

6. Remove the four button screws and washers securing the elevate actuator to the top
of the frame.

7. Remove the two screws and small washers securing the actuator switch sensor to the
elevate actuator.

Pronto® Series 94 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

Installing

1. Secure the actuator switch sensor to the elevate actuator using the two screws and
small washers. Tighten securely.

2. Secure the elevate actuator to the top of the frame using the four button screws and
washers. Torque to 75 in-lbs ± 20%.

3. Secure the elevate actuator to the bottom of the frame using the four hex screws and
washers. Torque to 75 in-lbs ± 20%.

4. Connect the actuator connector to the controller connector (Detail “A”).

5. Secure the cables to the frame using three tie-wraps in the locations shown in Detail
“A ” .

6. Install the batteries. Refer to Removing/Installing Batteries from/into Battery Tray on
page 99.

7. Install the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly on page 50.

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

Part No. 1125075 95 Pronto® Series

SECTION 10—SHROUDS AND FRAME

Elevate Actuator

Actuator

Mounting Holes

Button

Screw

Washer

Actuator Switch

Sensor

Screw

Washer

Small

Button Screw

Washer

DETAIL “A” -

WIRE ROUTING

Frame

Tie-Wraps

Washer

Hex Screw

Actuator

Connector

Controller

Connector

FIGURE 10.8 Removing/Installing the Elevate Actuator

Pronto® Series 96 Part No. 1125075

SECTION 10—SHROUDS AND FRAME

Removing/Installing the Actuator Switch Sensor

NOTE: For this procedure, refer to FIGURE 10.8 on page 96.

NOTE: This procedure applies to M61 wheelchairs only.

Removing

1. Elevate the seat. Refer to Elevating the Seat on page 37.

2. Remove the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly on page 50.

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

3. Remove the batteries. Refer to Removing/Installing Batteries from/into Battery Tray
on page 99.

4. Remove the two screws and small washers securing the actuator switch sensor to the
elevate actuator.

Installing

1. Secure the actuator switch sensor to the elevate actuator using the two screws and
small washers. Tighten securely.

2. Install the batteries. Refer to Removing/Installing Batteries from/into Battery Tray on
page 99.

3. Install the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly on page 50.

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

Part No. 1125075 97 Pronto® Series

SECTION 11—BATTERIES

SECTION 11—BATTERIES

Warnings For Handling and Replacing Batteries

 WARNING

After any adjustments, repair or service and before use, make sure that all attaching
hardware is tightened securely - otherwise injury or damage may result.

Make sure power to the wheelchair is Off before performing this section.

The use of rubber gloves is recommended when working with batteries.

Invacare strongly recommends that battery installation and battery replacement
ALWAYS be done by a qualified technician.

U1 batteries weigh 24 pounds each. Use proper lifting techniques (lift with your
legs) to avoid injury.

Use U1 batteries only. Failure to use the correct battery size and/or voltage may
cause damage to your wheelchair and give you unsatisfactory performance.

ALWAYS use a battery handle/lifting strap when lifting a battery. It is the most
convenient method and assures that the battery acid will not spill. It also helps to
prolong the life of the battery.

DO NOT tip the batteries. Keep the batteries in an upright position.

NEVER allow any of your tools and/or battery cables to contact both battery posts
at the same time. An electrical short may occur and serious personal injury or
damage may occur.

The POSITIVE (+) battery cable MUST connect to the POSITIVE (+) battery
terminal, otherwise serious damage will occur to the electrical system.

Connect same color connectors to each other (RED to RED, BLACK to BLACK).

DO NOT remove fuse or mounting hardware from POSITIVE (+) battery cable
mounting screw. To replace the fuse, obtain and replace battery harness with fuse.

Wheelchairs should be examined during maintenance for signs of corrosion (water
exposure, incontinence, etc.). Electrical components damaged by corrosion should
be replaced IMMEDIATELY.

Wheelchairs that are used by incontinent users and/or are frequently exposed to
water may require replacement of electrical components more frequently.

NOTE: If there is battery acid in the bottom of the battery tray or on the sides of the battery, apply
baking soda to these areas to neutralize the battery acid. Before reinstalling the existing or new
battery, clean the baking soda from the battery tray or battery being sure to avoid contact with skin
and eyes. Determine source of contamination. NEVER install/reinstall a battery with a cracked or
otherwise damaged case.

Pronto® Series 98 Part No. 1125075

SECTION 11—BATTERIES

Using the Proper Batteries

NOTE: For this procedure, refer to FIGURE 11.1.

1. Place battery on ground/flat surface.

2. Visually draw a horizontal and vertical centerline through the middle of battery
(FIGURE 11.1).

3. Position the battery so that the terminals are above the horizontal centerline.

4. Visually inspect the battery to ensure the correct position of the POSITIVE and
NEGATIVE terminals (FIGURE 11.1).

 WARNING

Batteries with terminal configuration as shown below MUST be used. Batteries that
have the reverse terminal configuration MUST NOT be used - otherwise injury and
damage may occur.

Use This Configuration

U1 Battery

NEGATIVE (-)

Battery Terminal

NEGATIVE (-)

Battery Terminal

POSITIVE (+)

Battery Terminal

DO NOT Use

POSITIVE (+)

Battery Terminal

U1 Battery

FIGURE 11.1 Using the Proper Batteries

Removing/Installing Batteries from/into Battery Tray

 WARNING

ALWAYS use the battery handle when lifting the battery. It is the most convenient
method and assures that the battery acid will not spill. It also helps to prolong the
life of the battery.

DO NOT tip the batteries. Keep the batteries in an upright position.

Part No. 1125075 99 Pronto® Series

SECTION 11—BATTERIES

NOTE: For this procedure, refer to FIGURE 11.2 on page 101.

NOTE: If there is battery acid in the bottom of the battery tray or on the sides of the battery, apply
baking soda to these areas to neutralize the battery acid. Before reinstalling the existing or new
battery, clean the baking soda from the battery tray or battery being sure to avoid contact with skin
and eyes. Determine source of contamination. NEVER install/reinstall a battery with a cracked or
otherwise damaged case.

NOTE: Have the following tools available:

TOOL QTY COMMENTS

7/16-INCH (6PT) BOX WRENCH 1 Not Supplied

DIAGONAL CUTTERS 1 Not Supplied

Removing

1. Place the wheelchair in a well ventilated area where work can be performed without
risking damage to carpeting or floor covering.

2. Verify the joystick On/Off switch is in the Off position and disconnect joystick cable
(not shown). Refer to Disconnecting/Connecting the Joystick on page 123.

3. Remove the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly on page 50.

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

4. Remove the top shroud. Refer to Removing/Installing the Top Shroud on page 87.

5. Disconnect the front battery from the controller (BLACK connector).

6. Disconnect the rear battery from the front battery (RED and BLACK connectors).

7. Lift rear and front battery out of the battery tray using the battery handles.

Installing

1. Verify the joystick On/Off switch is in the Off position and disconnect joystick cable.
Refer to Disconnecting/Connecting the Joystick on page 123.

2. Position the front battery in the front of the battery tray.

3. Position rear battery in rear of battery tray.

NOTE: Ensure that both batteries are properly seated and resting on the battery tray.

4. Connect the rear battery to the front battery (RED and BLACK connectors).

5. Connect the front battery to the controller (BLACK connector).

6. Reinstall the top shroud. Refer to Removing/Installing the Top Shroud on page 87.

7. Reinstall the seat. Refer to one of the following procedures:

• Van Seats - Refer to Removing/Installing the Seat Assembly

on page 50.

• ASBA Seats - Refer to Removing/Installing the Seat Assembly on page 59.

Pronto® Series 100 Part No. 1125075