Snorkel TB66J User Manual
Models TB66J/TB66JRT
Replaces 0083740 March 2014
OPERATOR’S
MANUAL
Part Number 0083740
May 2014
The aerial platform is not electrically insulated. Death or serious injury will result from contact
with, or inadequate clearance from, an energized conductor.
Do not go closer than the minimum safe approach distance as dened by the Minimum Safe
Approach Distance section in Chapter 3 – Safety.
Regard all conductors as energized.
Allow for electrical wire sag and aerial platform sway.
If the platform, booms, or any part of the aerial platform contacts a high-voltage electrical conductor,
the entire machine can become electrically charged.
If that happens, remain on the machine and do not contact any other structure or object. This includes
the ground, adjacent buildings, poles, and any other objects that are not part of the aerial platform.
Such contact could make your body a conductor to the other object, creating an electrical shock
hazard resulting in death or serious injury.
If an aerial platform is in contact with an energized conductor the platform operator must warn ground
personnel in the vicinity to stay away. Their bodies can conduct electricity creating an electrical shock
hazard resulting in death or serious injury.
Do not approach or leave the aerial platform until the electricity has been turned off.
Do not attempt to operate the lower controls when the platform, booms, or any part of the aerial
platform is in contact with a high-voltage electrical conductor or if there is an immediate danger of
such contact.
Personnel on or near an aerial platform must be continuously aware of electrical hazards, recognizing that death or serious injury can result from contact with an energized conductor.
California
Proposition 65 Warning
Battery posts, terminals and related accessories contain lead
and lead components, a chemical known to the State of California to cause cancer and birth defects or other reproductive
harm. Wash hands after handling.
California
Proposition 65 Warning
Diesel and gasoline engine exhaust and some of its constituents are known by the State of California to cause cancer, birth
defects and other reproductive harm.
Table of Contents
Electrical Danger ............................ Inside Front Cover
California Proposition 65 ................ Inside Front Cover
Chapter 1 – Introduction
Aerial Platform Features ...........................................1
Options .....................................................................1
Operator’s Manual ....................................................1
Safety Alerts .............................................................1
Operation ..................................................................2
Maintenance .............................................................2
Manual of Responsibilities ........................................2
Additional Information ...............................................2
Chapter 3 – Specications
Component Identication ..........................................3
Working Envelope ....................................................4
General Specications..............................................5
Engine Specications ...............................................6
Engine Oil Viscosity ..................................................8
Chapter 3 – Safety
Electrocution Hazards ............................................11
Minimum Safe Approach Distance .........................11
Prestart Inspection..................................................12
Work Place Inspection and Practices .....................12
Operation ................................................................12
Tip-Over and Falling Hazards .................................13
Electrical System ....................................................13
Hydraulic System....................................................13
Engine and Fuel Handling Precautions ..................14
Placards and Decals...............................................14
Chapter 4 – Safety Devices
Emergency Stop Controls.......................................15
Emergency Power System .....................................15
Emergency Lowering Knob ....................................16
Ground Operation Switch .......................................16
Platform Foot Switch ..............................................16
Guardrails ...............................................................16
Lanyard Anchors.....................................................16
Ground Fault Circuit Interrupter ..............................17
Tilt Alarm .................................................................17
Engine Protection Systems ....................................17
High Engine Temperature Alarm .........................17
Low Oil Pressure Alarm .......................................17
Horn ........................................................................18
All Motion Alarm......................................................18
Flashing Light .........................................................18
Driving Lights .......................................................... 18
Platform Work Lights ..............................................18
Bump Guard System ..............................................18
Chapter 5 – Gauges and Displays
Hour Meter..............................................................19
Engine Temperature Gauge ...................................19
Ammeter – Cummins, Deutz and Ford Engines .....19
Voltmeter – General Motors Engines......................19
Engine Air Filter Gauge ..........................................19
Fuel Gauge .............................................................19
Engine Oil ...............................................................20
Hydraulic Fluid Filter Gauge ...................................20
Fluid Level and Temperature Gauge ......................20
Chapter 6 – Controls
Battery Disconnect Switch ...................................... 21
Lower Controls .......................................................21
Emergency Stop Button ......................................21
Control Selector Switch .......................................21
Start Switch .........................................................21
Ground Operation Switch ....................................22
Rotation Switch ...................................................22
Boom Elevation Switch .......................................22
Boom Extend/Retract Switch ..............................22
Jib Articulation Switch .........................................22
Boom Speed Knob .............................................23
Platform Level Switch ..........................................23
Platform Rotation Switch .....................................23
Engine/Emergency Power Switch .......................23
Throttle Switch ....................................................23
Fuel Switch ..........................................................23
Hydraulic System Warm-up Switch .....................23
Circuit Breaker Reset Buttons ................................24
Upper Controls .......................................................24
Start Switch .........................................................25
Emergency Stop Button ......................................25
Drive Joystick ......................................................25
Drive Range Switch .............................................26
Boom Joystick .....................................................26
Boom Extension Switch ......................................26
Jib Articulation Switch .........................................26
Platform Level Switch ..........................................26
Platform Rotation Switch .....................................26
Boom Speed Knob ..............................................26
Throttle Switch ....................................................26
Engine/Emergency Power Switch .......................27
Platform Foot Switch ..............................................27
Machine/Generator Switch .....................................27
Hydraulic System Warm-up Switch ........................27
Driving and Platform Work Lights ...........................28
Horn Button ............................................................28
TB66J – 0083740
Table of Contents
Chapter 7 – Prestart Inspection
Operator’s Manual ..................................................29
Engine ....................................................................29
Oil Level ..............................................................29
Coolant ................................................................29
Radiator ...............................................................30
Fuel Tank .............................................................30
Fuel Line .............................................................31
Air Filter ...............................................................31
Charging System ................................................31
Cold Weather Start Kit ........................................31
Electrical System ....................................................32
Battery Fluid Level ..............................................32
Battery Terminals .................................................32
Cables and Wiring Harness .................................... 32
Hydraulic System....................................................32
Fluid Level ...........................................................32
Fluid Filter ...........................................................33
Hoses, Tubes, and Fittings ..................................33
Tires and Wheels ....................................................33
Lower Control Station .............................................34
Operating Controls ..............................................34
Emergency Stop ..................................................34
Emergency Power ...............................................34
Emergency Lowering .............................................. 34
Level Sensor...........................................................35
Flashing Light .........................................................35
Sandblast Protection Kit .........................................36
Structures ...............................................................36
Weldments ..........................................................36
Slide Pads ...........................................................36
Wire Ropes .........................................................36
Fasteners ............................................................37
Upper Control Station .............................................37
Guardrail System ................................................37
Lanyard Anchors .................................................38
Operating Controls ..............................................38
Emergency Stop ..................................................38
Emergency Power ...............................................38
Horn ....................................................................39
Electrical Power Outlet ........................................39
All Motion Alarm......................................................39
Air Line to Platform .................................................39
Driving and Platform Work Lights ...........................39
Tow Kit ....................................................................40
Platform Glazier Package ....................................... 40
Platform Control Cover ...........................................40
Placards and Decals...............................................40
Prestart Inspection Checklist ..................................47
Chapter 8 – Operation
Cold Weather Start Up ...........................................49
Engine Cold Weather Start Kit ................................49
Cummins, Kubota and Ford – Block Heater ........49
Cummins – Ether Injection ..................................49
Deutz – Manifold Preheater ................................50
GM – Radiator Hose In-Line ...............................50
Hydraulic System Cold Weather Warm-Up ............50
Hydraulic System Warm-up Switch .....................50
Manually Warming The Hydraulic System ..........50
Preparing for Operation ..........................................50
Lower Controls .......................................................50
Upper Controls .......................................................51
Boom Operation ..................................................52
Driving and Steering ............................................52
Drive Speeds .......................................................53
Motion Warning Alarm .........................................53
Four Wheel Drive....................................................53
Gradeability ............................................................53
Percent vs. Degree of Slope ...............................54
Driving on a Slope ...............................................54
Calculating Percent Grade ..................................54
Machine Gradeability ..........................................55
All Motion Alarm......................................................55
Four Wheel Drive....................................................55
Electrical Power Outlet ...........................................55
AC Generator .........................................................55
Dual Fuel ................................................................56
Air Line ...................................................................56
Driving Lights .......................................................... 56
Platform Work Lights ..............................................56
Platform Glazier Package ....................................... 57
Platform Capacity ................................................57
Bump Guard System ..............................................57
Chapter 9 – Stowing and Transporting
Stowing ...................................................................59
Transporting ...........................................................59
Driving .................................................................59
Winching .............................................................60
Hoisting ...............................................................60
Securing for Transport .........................................61
Chapter 10 – Emergency Operation
Emergency Power System .....................................63
Lower Controls ....................................................63
Upper Controls ....................................................63
Emergency Lowering .............................................. 64
Towing ....................................................................65
Chapter 11 – Troubleshooting
Troubleshooting Chart ............................................67
Appendix A – Glossary
Limited Warranty
TB66J – 0083740
Chapter 1 – Introduction
Aerial Platform Features
The aerial platform is a boom-supported elevating work
platform used to raise personnel, tools and materials to
the workstation. The booms are raised and lowered with
hydraulic cylinders. Hydraulic motors on the drive wheels
provide power to move the aerial platform.
The standard machine includes the following features.
Proportional boom lift, swing and drive control
180 degree hydraulic platform rotation
360 degree continuous turntable rotation
6′ articulating jib boom
39″ x 96″ (99 cm x 243 cm) steel
500 lb (227 kg) capacity platform
Platform gravity gate
Drivable at full height
Two safety lanyard attachments
Manual lowering valve at chassis
Hydraulic oil level and temperature gauges
Tie-down/lifting lugs
Battery operated emergency power system
Engine anti-restart
High engine temperature shut down
Low oil pressure shut down
Tilt alarm
Hour meter
Ammeter – Cummins, Deutz, Ford engines
Voltmeter – GM engine
Coolant temperature gauge
Spark arrestor mufer – GM engines
Foam lled tires
Four wheel drive
Five year limited warranty
The machine may be powered with one of the following
engines.
Cummins B3.3 – Diesel
Deutz F4L-1011F – Diesel
Deutz F4L-2011F – Diesel
Kubota V2403-M-T – Diesel
Ford LRG 425 – Gasoline, LPG or dual fuel
Ford LRG 423 – Gasoline, LPG or dual fuel
General Motors 2.4L – Gasoline, LPG or dual fuel
The aerial platform has been manufactured to conform
to all applicable requirement of the following organizations.
Occupational Safety and Health Administration
(OSHA)
American National Standards Institute (ANSI)
Options
The following options may be provided on the machine.
Lower control cover
Platform work lights – ood lights
Flashing light
Driving lights – two headlights and two rear lights
Platform swinging gate
Side entry gravity gate
Sandblast protection kit
Cold weather start kit
Hydraulic system cold weather warm-up kit
AC generator – hydraulic powered, 110 V, 2000 W
AC generator – hydraulic powered, 220 V, 50Hz
All motion alarm
Airline to platform
Tow kit
30″ x 96 (76 cm x 244 cm) aluminum 500 lb
(272 kg) capacity platform
30″ x 96″ (76 cm x 244 cm) steel 500 lb
(227 kg) capacity platform
30″ x 60″ (76 cm x 152 cm) aluminum 600 lb
(272 kg) capacity platform
Horn
Two wheel drive
Platform glazier package
Platform welder package
Spark arrestor mufer – Deutz engines
Dual fuel with 20 gallon gasoline tank
Tilt warning light
Flotation tires
Highway tread tires
Non-marking tires
Canadian Standards Association (CSA)
Operator’s Manual
This manual provides information for safe and proper
operation of the aerial platform. Some information in
this manual refers to options that may or may not be on
your machine. Read and understand the information
in this Operator’s Manual before operating the aerial
platform on the job.
Additional copies of this manual may be ordered from
Snorkel. Supply the model and manual part number
from the front cover to assure that the correct manual
will be supplied.
All information in this manual is based on the latest
product information at the time of publication. Snorkel
reserves the right to make product changes at any time
without obligation.
Safety Alerts
A safety alert symbol is used throughout this manual to
indicate danger, warning and caution instructions. Follow
these instructions to reduce the likelihood of personal
injury and property damage. The terms danger, warning
TB66J – 0083740 1
Chapter 1 – Introduction
and caution indicate varying degrees of personal injury
or property damage that can result if the instruction is
not followed.
Danger
Indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
This signal word is to be used in the most extreme
situations.
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 minor or moderate injury. It
may also be used to alert against unsafe practices.
Notes
Notes are used to provide special information or helpful
hints to assist in aerial platform operation, but do not
indicate a hazardous situation.
Operation
The aerial platform has built-in safety features and has
been factory tested for compliance with Snorkel specications and industry standards. However, any personnel
lifting aerial platform can be potentially dangerous in the
hands of untrained or careless operators.
Warning
The potential for an accident increases when the
aerial platform is operated by personnel who are not
trained and authorized. Death or serious injury can
result from such accidents. Read and understand
the information in this manual and on the placards
and decals on the machine before operating the
aerial platform on the job.
Maintenance
Every person who maintains, inspects, tests, or repairs
the aerial platform must be qualied to do so. Following
the daily prestart inspection in this Operator’s Manual will
help keep the aerial platform in optimum working condition. Other maintenance functions must be performed
by maintenance personnel who are qualied to work on
the aerial platform.
Caution
Welding current can be very intense. Damage to electronic components may result. Connect the ground
clamp as close as possible to the area being welded.
Disconnect battery cables and any microprocessors
and engine control modules before welding on the
machine.
If it becomes necessary to weld aerial platform components as a method of repair, take all precautions to
prevent damage to electronic circuitry and devices on
the machine. This includes, but may not be limited to,
disconnecting battery cables and electronic devices.
Do not modify this aerial platform without prior written con-
sent of the Snorkel Engineering Department. Modication
may void the warranty, adversely affect stability, or affect
the operational characteristics of the aerial platform.
Manual of Responsibilities
All owners and users of the aerial platform must read,
understand, and comply with all applicable regulations.
Ultimate compliance to OSHA regulations is the responsibility of the user and their employer.
ANSI publications clearly identify the responsibilities
of all personnel who may be involved with the aerial
platform. A reprint of the “Manual of Responsibilities for
Dealers, Owners, Users, Operators, Lessors and Lessees of ANSI/SIA A92.5-2006 Boom-Supported Elevating Work Platforms” is available from Snorkel dealers or
from the factory upon request.
Training is essential and must be performed by a quali-
ed person.
Become procient in knowledge and actual operation
before using the aerial platform on the job.
The operator must be trained and authorized to
perform any functions of the aerial platform.
Operation of the aerial platform must be within the
scope of the machine specications.
The operator bears ultimate responsibility for following
all manufacturer’s instructions and warnings, regulations
and safety rules of their employer and/or any state or
federal law.
2 TB66J – 0083740
Copies are also available from:
Scaffold Industry Association, Inc.
P.O. Box 20574
Phoenix, AZ 85036-0574 USA
Additional Information
For additional information contact your local dealer or
Snorkel at:
Snorkel International
P.O. Box 1160
St. Joseph, MO 64502-1160 USA
1-800-255-0317
http://www.snorkelusa.com
Component Identication
Upper Controls
Chapter 3 – Specications
Fuel Tank
LP Fuel Tank
Operator’s
Manual
Wiring Box
Lower Controls
Emergency
Lowering
Valve
Engine
Hydraulic Fluid Tank
And Filter
Steer Wheels
Right Side
Battery Disconnect Switch
Batteries
Main Boom
Chassis
Intermediate
Boom
Jib Boom
Steer Wheels
Tip Boom
Platform
Platform
Foot Switch
Left Side
TB66J – 0083740 3
Chapter 2 – Specications
Working Envelope
Feet
(Meters)
70
(21.3)
60
(18.3)
50
(15.2)
40
(12.2)
30
(9.1)
20
(6.1)
10
(3)
0
5
(1.5)
60
(18.3)
4 TB66J – 0083740
50
(15.2)
40
(12.2)
30
(9.1)
20
(6.1)
(3)
010
10
(3)
General Specications
Chapter 2 – Specications
Aerial Platform
Working height 72′ (21.9 m)
Maximum platform height 66′ (20.1 m)
Horizontal reach 56′ (17.1 m)
Main boom
Articulation -1° to +72°
Extension 0 to 27′ 4″ (0 to 8.33 m)
Turntable rotation 360° continuous
Turning radius, inside 15′ 5″ (4.7m)
Wheelbase 10′ (3 m)
Ground clearance 13″ (33 cm)
Maximum wheel load 13,360 lbs (6060 kg)
Maximum ground pressure 80 psi (552 kPa)
Weight, GVW
Approximate 26,220 lbs (11,916 kg)
Stowed width 7′ 11.5″ (2.4 m)
Stowed length 33′ (10 m)
Stowed height 8′ 9″ (2.7 m)
Platform
Dimensions
Standard steel 39″ x 96″ (99 cm x 243 cm)
Rated work load 500 lb (227 kg)
Optional aluminum 30″ x 60″ (76 cm x 152 cm)
Rated work load 600 lb (272 kg)
Optional aluminum 30″ x 96″ (76 cm x 244 cm)
Rated work load 500 lb (227 kg)
Optional steel 30″ x 96″ (76 cm x 244 cm)
Rated work load 500 lb (227 kg)
Rotation 90° CW to 80° CCW
Maximum number of occupants 2 people
Optional AC generator 125 VAC
Optional AC generator 220 VAC, 50 Hz
Function Speed
Turntable rotation, 360 degrees 85 to 95 seconds
Main boom
Up 40 to 50 seconds
Down 40 to 50 seconds
Extend 60 to 70 seconds
Retract 35 to 50 seconds
Jib
Up 7 to 13 seconds
Down 7 to 13 seconds
Platform rotation, 170 degrees 16 to 20 seconds
Drive
High, booms stowed 3.0 mph (4.8 km/h)
Low, booms elevated 1.0 mph (1.6 km/h)
Drive System
Standard Four-wheel drive
Gradeability 30%
Optional Two-wheel drive
Gradeability 25%
Tires
Foam Fillled
Highway tread,14 ply 15″ x 19.5″ (38 cm x 50 cm)
Bar lug, 4x4 12 ply 15″ x 19.5″ (38 cm x 50 cm)
Flotation, 4x4 40″ x 19-19.5″ (101.6 cm x 50 cm)
Air Fillled
Flotation 40″ x 19-19.5″ (101.6 cm x 50 cm)
Electrical System
Voltage 12 V DC negative chassis ground
Source 12 V 550 CCA battery
Fluid recommended distilled water
Hydraulic System
Maximum pressure 2,500 psi (17,250 kPa)
Reservoir capacity 26.1 US gal (99 l)
System capacity 35 US gal (132 l)
Maximum operating temperature 200°F (93°C)
Hydraulic uid recommended
Above 10°F (-12°C) Mobil DTE-13M (ISO VG32)
Below 10°F (-12°C) Mobil DTE-11M (ISO VG15)
Engine
Diesel Cummins B3.3
Deutz F4L-1011F
Deutz F4L-2011F
Kubota V2403-M-T
Gasoline and/or LPG Ford LRG 423
Ford LRG 425
General Motors 2.4L
Fuel Tank Capacity
Diesel or gasoline 40 US gal (151 l)
LPG 43.5 lbs (19.7 kg)
Dual fuel gasoline 20 US gal (76 l)
Ambient Air Temperature Operating Range
Fahrenheit 0°F to 110°F
Celsius -18°C to 43°C
Maximum Wind Speed
Gust or steady 28 mph (12.8 m/s)
TB66J – 0083740 5
Chapter 2 – Specications
Engine Specications
Engine Displacement Fuel Grade Coolant
Diesel
Cummins
B3.3
Deutz
F4L-1011F
Deutz
F4L-2011F
Kubota
V2403-M-T
199 cu. in.
(3.26 liter)
190 cu. in.
(3.11 liter)
190 cu. in.
(3.11 liter)
148.5 cu. in.
(2.43 liter)
ASTM No. 2D fuel with a mini-
mum Cetane no. of 40.1 For op-
erating temperature below 0°C
(32°F) use winterized No. 2D.
Diesel
DIN 51 601 (February 1986).
BS 2869: A1 and A2 (with A2
refer to Deutz manual about
sulfur content)
ASTM D 975-88: 1-D and 2-D
3
CEN EN 590 or DIN EN 590
NATO Code F-54 and F-75
For operating temperatures
1
below 0°C (32°F) use winter
grade diesel.
Diesel
DIN 51 601 (February 1986).
BS 2869: A1 and A2 (with A2
refer to Deutz manual about
sulfur content)
ASTM D 975-88: 1-D and 2-D
CEN EN 590 or DIN EN 590
NATO Code F-54 and F-75
For operating temperatures
1
below 0°C (32°F) use winter
grade diesel.
Diesel
Diesel Fuel No. 2-D
ASTM D975
50% Water
50% Antifreeze
1
1
50% water
1
50% Antifreeze
Air
Air
Operating
Temperature
140°F to 212°F
2
60°C to 100°C
172°F to 203°F
78°C to 95°C
172°F to 203°F
78°C to 95°C
2
NA
Oil
Capacity
2 US gal
(7.5 liter)
2.75 US
gal (10.4
liter)
2.75 US
gal (10.4
liter)
2.51 gal
(9.5 liter)
Grade
15W-40
3
CH4/SG
API: CD
higher
API: CD
higher
CF grade
or higher
Oil
SAE
3
API
or
3
or
3
API:
3
Note 1: Refer to the engine manufacturers manual for specic fuel recommendations and specications.
Note 2: Refer to the engine manufacturers manual for specic coolant recommendations and specications.
Note 3: Refer to the engine manufacturers manual for specic lubricating oil recommendations and specications.
6 TB66J – 0083740
Chapter 2 – Specications
Engine Displacement Fuel Grade Coolant
Ford
LRG 425
Ford
LRG 423
GM
2.4L
153 cu. in.
(2.5 liter)
140 cu. in.
(2.3 liter)
150 cu. in.
(2.4 liter)
Gasoline
Unleaded 87 or 89 octane.
Do not use gasoline blends with
more than 10% ethanol by
volume octane index of 87 or 89.
3
LPG
HD-5 USA
EN589 European
Gasoline
Unleaded gasoline 85 octane
(motor method).
LPG
Gas Processors Association
Standard 2140
Category: special duty propane
Gasoline
Unleaded 87 octane
LPG
HD-5
1
1
1
50% Water
50% Antifreeze
1
50% Water
50% Antifreeze
1
50% Water
50% Antifreeze
Operating
Temperature
195°F to 220°F
3
91°C to 104°C
160°F to 190°F
3
71°C to 88°C
176°F to 183°F
5
80°C to 84°C
Oil
Capacity
4.5 US qt
(4.26 liter)
4 US qt
(3.8 liter)
With lter:
1.12 US gal
(4.5 liter)
W/o lter:
1.18 US gal
(4.25 liter)
Grade
API: SH
3
Gasoline
API: SH
SG only if
SH is not
available
SG or SH
ILSAC
Oil
or SJ
LPG
GF-4
2
2
4
Note 1: Refer to the engine manufacturers manual for specic fuel recommendations and specications.
Note 2: Refer to the engine manufacturers manual for specic lubricating oil recommendations and specications.
Note 3: Refer to the Ford LRG 425 Operator Handbook for specic coolant recommendations and specications.
Note 4: API Starburst symbol on GF-4 oils reads “API Service SM.”
Note 5: Refer to the engine manufacturers manual for specic coolant recommendations and specications.
TB66J – 0083740 7
Chapter 2 – Specications
S AE 1 5W /4 0
Engine Oil Viscosity
Cummins B3.3
Deutz F4L-1011F
Deutz F4L-2011F
Kubota V2403-M-T
8 TB66J – 0083740
Ford LRG 423
°F
°F
-4 0
-3 1
-2 2
-1 3
-4
5
14
23 32
41
50 59 6 8 7 7 8 6 104
122
°C
°C
-4 0
-3 5
-3 0 -2 5 -2 0 -15 -1 0
-5
0
10
15 2 0 25
30
40 5 0
5
S AE 5 W /3 0
S AE 0 W /3 0
Chapter 2 – Specications
Ford LRG 425
General Motors 2.4L
Note
No straight weight oils and no specialized diesel oils are
to be used in GM engines.
TB66J – 0083740 9
Chapter 2 – Specications
10 TB66J – 0083740
Chapter 3 – Safety
D enotes
pro h ib ited
zon e
Knowledge of the information in this manual, and
proper training, provide a basis for safely operating the
aerial platform. Know the location of all controls and
how they operate to act quickly and responsibly in an
emergency.
Safety devices reduce the likelihood of an accident.
Never disable, modify, or ignore any safety device.
Safety alerts in this manual indicate situations where
accidents may occur.
If any malfunction, hazard or potentially unsafe condition
relating to capacity, intended use, or safe operation is suspected, stop aerial platform operation and seek assistance.
The operator bears ultimate responsibility for following
all manufacturer’s instructions and warnings, regulations
and safety rules of their employer and/or any state or
federal law.
Electrocution Hazards
The aerial platform is made of metal components and is
not insulated. Regard all conductors as energized. Do
not operate outside during a thunderstorm.
Minimum Safe Approach Distance
Minimum safe approach distances to energized power
lines and their associated parts must be observed while
operating the aerial platform.
Danger
The aerial platform is not electrically insulated.
Death or serious injury will result from contact
with, or inadequate clearance from, an energized
conductor. Do not go closer than the minimum safe
approach distance as dened by ANSI.
ANSI publications dene minimum distances that must
be observed when working near bus bars and energized
power lines. Table 1 and Figure 3 are reprinted courtesy
of Scaffold Industry Association, ANSI/SIA A92.5.
Voltage Range
(Phase to Phase)
0 to 300V Avoid Contact
Over 300V to 50kV 10 3.05
Over 50kV to 200kV 15 4.60
Over 200kV to 350Kv 20 6.10
Over 350kV to 500kV 25 7.62
Over 500kV to 750kV 35 10.67
Over 750kV to 1000kV 45 13.72
Minimum Safe Approach Distance
Feet Meters
Table 1 – Minimum Safe Approach Distance
Figure 3 – Minimum Safe Approach Distance
TB66J – 0083740 11
Chapter 3 – Safety
Prestart Inspection
Perform a prestart inspection before each shift as described in Chapter 7. Do not use the aerial platform on
the job unless you are trained and authorized to do so.
Work Place Inspection and Practices
Do not use the aerial platform as a ground connection
when welding.
The welding ground clamp must be attached to the
same structure that is being welded.
Electrical current ow can be very intense, causing
serious internal damage to some components.
Inspect the area before and during aerial platform use.
The following are some potential hazards that may be
in the work place.
• Debris
• Slopes
• Drop-offs or holes
• Bumps and oor obstructions
• Overhead obstructions
• Unauthorized persons
• High voltage conductors
• Wind and weather conditions
• Inadequate surface and support to withstand load
forces applied by the aerial platform in all operating
congurations
Before using the aerial platform in any hazardous
(classied) location, make certain it is approved and
of the type required by ANSI/NFPA 505 for use in that
particular location.
booms, or platform. Allow sufcient room and time
to stop movement to avoid contact with structures
or other hazards.
Always look in the direction of movement.
Drive with care and at speeds compatible with the
work place conditions.
Use caution when driving over rough ground, on
slopes and when turning.
Do not engage in any form of horseplay or permit
riders any place other than in the platform.
Secure all accessories, containers, tools, and other
materials in the platform to prevent them from accidentally falling or being kicked off the platform. Remove all
objects that do not belong in or on the aerial platform.
Never steady the platform by positioning it against another platform.
Warning
The potential for an accident increases when operating an aerial platform that is damaged or malfunctioning. Death or serious injury could result from
such accidents. Do not operate the aerial platform
if it is damaged or malfunctioning.
Do not operate the aerial platform if it is damaged or not
functioning properly. Qualied maintenance personnel
must correct the problem before putting the aerial platform back into service.
Know and understand the job site trafc-ow patterns
and obey the agmen, road signs and signals.
While operating the aerial platform, a good safety
practice is to have qualied personnel in the immediate
work area to:
• Help in case of an emergency
• Operate emergency controls as required
• Watch for loss of control by platform operator
• Warn the operator of any obstructions or hazards
that may not be obvious to them
• Watch for soft terrain, sloping surfaces, drop-offs,
etc. where stability could be jeopardized
• Watch for bystanders and never allow anyone to be
under, or to reach through the booms while operating the aerial platform
Danger
Pinch points may exist between moving components.
Death or serious injury will result from becoming
trapped between components, buildings, structures,
or other obstacles. Make sure there is sufcient clearance around the machine before moving the chassis,
Operation
Use three points of support when entering or exiting
the platform. For example, use two hands and one foot
when climbing into the platform.
Never cover the platform oor grating or otherwise obstruct your view below. Make sure the area below the
platform is free of personnel before lowering.
Keep both feet positioned rmly on the platform oor.
Operate the controls slowly and deliberately to avoid
jerky and erratic operation.
Always stop the controls in neutral before going in
the opposite direction.
Do not dismount while the aerial platform is in motion
or jump off the platform.
Properly stow the aerial platform and secure it against
unauthorized operation at the end of each work day,
before transporting, or if it is left unattended.
12 TB66J – 0083740
Chapter 3 – Safety
Tip-Over and Falling Hazards
Operate the aerial platform only on a rm, at, level
surface capable of withstanding all load forces imposed
by the aerial platform in all operating conditions. Refer to
the General Specications chart for the maximum wheel
load and ground pressure. Raise the booms only when
the aerial platform is on level ground.
Danger
The aerial platform can tip over if it becomes unstable. Death or serious injury will result from a tip-over
accident. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard.
All platform occupants must wear a fall restraint device
connected to a lanyard anchor point.
It is best not to transfer from the platform to another
structure or from the structure to the platform, unless
that is the safest way to do the job. Judge each situation
separately taking the work environment into account. If
it is necessary to transfer from the platform to another
structure the following guidelines apply:
1. Where possible, place the platform over a roof or
walking structure to do the transfer.
2. Transfer your anchorage from one structure to the
other before stepping across.
3. Remember that you might be transferring to a structure where personal fall arrest is required.
4. Use the platform entrance, do not climb over or
through the guardrails.
Do not operate the aerial platform in windy or gusty
conditions. Do not add anything to the aerial platform
that will increase the wind loading such as billboards,
banners, ags, etc.
Never operate the aerial platform without all parts of the
guardrail system in place and the gate closed. Make
sure that all protective guards, cowlings and doors are
securely fastened.
Do not climb on the guardrails or use ladders, planks or
other devices to extend or increase the work position
from the platform.
Take care to prevent rope, electrical cords, and hoses,
etc., from becoming caught in or on the aerial platform.
If the platform or booms becomes caught on an ad-
jacent structure or other obstacle and is prevented
from normal motion, reverse the control to free the
platform.
If control reversal does not free the platform, evacu-
ate the platform before attempting to free it.
Electrical System
Charge the batteries in a well-ventilated area free of
ame, sparks or other hazards that might cause re or
explosion.
Do not operate any of the aerial platform functions while
the battery charger is plugged in.
Warning
Batteries give off hydrogen and oxygen that can
combine explosively. Death or serious injury could
result from a chemical explosion. Do not smoke or
permit open ames or sparks when checking the
batteries.
Battery acid can damage the skin and eyes. Serious
infection or reaction can result if medical treatment
is not given immediately. Wear face and eye protection when working near the batteries.
Batteries contain sulfuric acid that can damage your
eyes or skin on contact.
Wear a face shield, rubber gloves, and protective
clothing when working around batteries.
If acid contacts your eyes, ush immediately with
clear water and get medical attention.
If acid contacts your skin, wash off immediately with
clear water.
Do not exceed the platform capacity as indicated on
the platform rating placard on the platform. Do not carry
loads that extend beyond the platform guardrails without
prior written consent from Snorkel.
Do not operate the aerial platform from trucks, trail-
ers, railway cars, oating vessels, scaffolds or similar
equipment unless the application is approved in writing
by Snorkel.
Do not use the aerial platform as a crane, hoist, jack or
for any purpose other than to position personnel, tools
and materials.
TB66J – 0083740 13
Hydraulic System
The hydraulic system contains hoses with hydraulic uid
under pressure.
Danger
Hydraulic uid escaping under pressure can have
enough force to inject uid into the esh. Serious
infection or reaction will result if medical treatment
is not given immediately. In case of injury by escaping hydraulic uid, seek medical attention at once.
Chapter 3 – Safety
Do not place your hand or any part of your body in front
of escaping hydraulic uid. Use a piece of cardboard or
wood to search for hydraulic leaks.
Engine and Fuel Handling Precautions
Refer to the engine manufacturer’s Operator’s Manual
for complete information on safe engine operation,
maintenance and specications.
Danger
Engine exhaust contains carbon monoxide, a poisonous gas that is invisible and odorless. Breathing
engine exhaust fumes will cause death or serious
illness. Do not run the engine in an enclosed area
or indoors without adequate ventilation.
Operate dual fuel machines on LPG fuel when indoors
to reduce exhaust fumes and carbon monoxide.
Be careful not to run the diesel fuel tank empty. Bleed
the fuel system if air enters the lines between the tank
and the injection pump.
Allow the engine to return to idle before shutting the
engine off.
Do not smoke or permit open ames while fueling or
near fueling operations.
Never remove the fuel cap or ll the fuel tank while the
engine is running or hot. Never allow fuel to spill on hot
machine components.
Maintain control of the fuel ller nozzle when lling the
tank. Spilled fuel is a potential re hazard.
Do not overll the fuel tank. Allow room for expansion.
Clean up spilled fuel immediately.
Tighten the fuel tank cap securely. If the fuel cap is lost,
replace it with an approved cap from Snorkel. Use of a
non-approved cap without proper venting may result in
pressurization of the tank.
Never use fuel for cleaning purposes.
For diesel engines, use the correct fuel grade for the
operating season.
Caution
Engine coolant escaping under pressure may cause
serious burns. Shut the engine off and let it cool
before removing the radiator cap.
Let the engine and radiator cool before adding coolant.
Placards and Decals
The aerial platform is equipped with placards and decals that provide instruction for operation and accident
prevention. Do not operate the aerial platform if any
placards or decals are missing or not legible.
14 TB66J – 0083740
Chapter 4 – Safety Devices
This aerial work platform is manufactured with safety
devices, placards, and decals to reduce the likelihood
of an accident.
For the safety of all personnel, do not disable, modify,
or ignore any safety device.
On older machines the emergency stop is a two-
position toggle switch with a red safety guard.
Push the guard down over the toggle switch to dis-
connect power to all control circuits. Lift the guard
and push the switch up to restore power.
Safety devices are included in the daily prestart
inspection.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Do not alter,
disable, or override any safety device.
If any safety devices are defective, remove the aerial
platform from service until qualied maintenance personnel can make repairs.
Emergency Stop Controls
There is an emergency stop control at the lower and
upper controls.
At the lower controls, the emergency stop button is a
two-position push button (refer to Figure 4.1).
Note
The lower controls override the upper controls. If the upper control emergency stop button is engaged, the lower
controls can still be used to operate the aerial platform.
At the upper controls, the emergency stop is a two-posi-
tion push button (refer to Figure 4.2).
Emergency
Stop Button
Engine/Emergency
Power Switch
Figure 4.2 – Upper Controls
Push the emergency stop button inward to discon-
nect power to the upper control circuits.
Emergency
Stop Button
Engine/Emergency
Power Switch
Ground Operation
Switch
Figure 4.1 – Lower Controls
Push the emergency stop button inward to discon-
nect power to all control circuits.
Pul l the bu tto n ou twa rd to r estore po wer.
Pull the button outward to restore power.
Emergency Power System
The emergency power system includes a back-up pump,
motor, and battery. Use this system to operate the boom
and turntable functions to lower the platform if the main
power system fails due to engine or pump failure.
Caution
The emergency power system is for emergency
lowering and stowing only. The length of time the
pump can be operated depends on the capacity
of the battery. Do not use this system for normal
operation.
Hold the engine/emergency power switch (refer to
Figure 4.1 and 4.2) downward to activate the emergency power system.
Release the switch to disengage the emergency
power system.
The length of time the pump can be operated de-
pends on the capacity of the battery.
TB66J – 0083740 15
Chapter 4 – Safety Devices
Emergency Lowering Knob
The emergency lowering knob may be used to lower
the booms if the engine will not start and the emergency
power system will not work.
The knob is on the base end of the main boom lift
cylinder (refer to Figure 4.3) under the left side of the
turntable.
Emergency
Lowering Knob
Figure 4.3 – Emergency Lowering Knob
Guardrails
The guardrails (refer to Figure 4.5) help protect personnel from falling off the platform.
The guardrail system includes:
A top rail
A mid rail
A gravity gate or optional swinging gate
Optional side entry gravity gate
Toeboards around the sides of the platform.
The gravity gate(s) allow for access to the platform and
close automatically after entering or exiting the platform.
After entering the platform check to make sure the gates
are fully lowered and even with the mid rail.
The optional swinging gate (refer to Figure 4.5) allows
for access to the platform. The gate must be securely
latched except when personnel are entering or leaving
the platform.
Ground Operation Switch
The ground operation switch (refer to Figure 4.1) prevents boom and platform movement if a control switch
on the lower control panel is accidentally moved.
Hold the switch up to operate the machine from the
lower controls.
Platform Foot Switch
Step down on the platform foot switch (refer to Figure
4.4) to activate the upper controls.
Top Rail
Lanyard
Anchors
Platform Foot
Switch
Figure 4.4 – Platform
The foot switch must be engaged and a control must be
moved to operate the boom, drive and/or platform from
the upper controls.
Gravity
Gate
Mid Rail
Toeboard
Figure 4.5 – Platform Swing Gate
Lanyard Anchors
Two lanyard anchors for fall restraint anchorage are
provided below the upper controls at the front of the
platform (refer to Figure 4.4).
Note
The lanyard anchors are not designed for lifting or tying
the machine down.
All personnel in the platform must connect their fall
restraint device to a lanyard anchor before raising
the platform.
Attach only one fall restraint device to each lanyard
anchor.
Do not use the aerial platform for personal fall arrest
anchorage.
16 TB66J – 0083740
Ground Fault Circuit Interrupter
The electrical power outlet at the platform (refer to Figure
4.6) contains a ground fault circuit interrupter (GFCI) to
provide protection for personnel.
Electrical
Power Outlet
Figure 4.6 – Electrical Outlet
Tilt Alarm
If the aerial platform chassis is out of level more than
ve degrees when the main boom is raised or extended,
an alarm will sound. The tilt alarm is located under the
upper control panel.
Chapter 4 – Safety Devices
Engine
Temperature
Gauge
Figure 4.7 – Lower Control Panel
Danger
The aerial platform can tip over if it becomes unstable. Death or serious injury will result from a tip-over
accident. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard.
Completely retract and lower the main boom and then
drive to a level surface when the tilt alarm sounds.
The tilt alarm is for added protection and does not
justify operating on anything other than rm, at, level
surfaces.
Engine Protection Systems
A constant alarm will sound to warn against high engine
temperature or low oil pressure.
The engine will shut-down
if the operating temperature exceeds a preset level
or if the oil pressure is too low for safe operation.
An engine temperature gauge is on the lower control
panel (refer to Figure 4.7).
High Engine Temperature Alarm
If the coolant in a Cummins or GM engine exceeds the
engine operating temperature an alarm will sound and
the engine will shut off.
If the oil in a Deutz engine exceeds 230°F (110°C) an
alarm will sound and the engine will shut off. Any time
there is no alternator current being produced, an alarm
will sound and the engine will shut off. This prevents
high engine temperature if the fan belt breaks.
Do not restart the engine until the condition that caused
the overheating has been corrected.
Low Oil Pressure Alarm
The low oil pressure alarm sounds when the engine oil
pressure is near the lower limit for safe engine operation.
If the alarm sounds, lower the platform to the ground
and then turn the engine off.
If the engine oil pressure falls below a safe operating
value the engine will shut off.
The engine can be restarted with low oil pressure,
but it will only run for a few seconds before it shuts
off again.
Do not restart the engine until the condition that
caused the low oil pressure has been corrected.
TB66J – 0083740 17
Chapter 4 – Safety Devices
Horn
An optional horn may be used to warn personnel on
the ground. The horn button is on the right side of the
upper control box.
The horn is operational when the emergency stop button and the start switches are both on, at the lower and
the upper controls.
All Motion Alarm
An optional all motion alarm may be provided on the
machine. The alarm sounds, in short beeps, anytime the
machine functions are being operated. The alarm is used
to warn personnel in the work area to stand clear.
Flashing Light
An optional amber ashing light may be located on
the top of the boom near the base end (refer to Figure
4.8). The ashing light warns personnel that the aerial
platform is in the area.
Flashing Light
Driving Lights
The optional headlights and blinking tail lights may be
used to help improve visibility while driving the aerial
platform and help others see it too.
The headlights are located on the top of the front
cowling.
The tail lights are mounted on the sides of the rear
cowling.
Do not use the driving lights to drive on public
roadways.
Platform Work Lights
The optional platform work lights may be used to help
improve visibility while working aloft in dimly lit areas.
The platform work lights are located on the top rail of
the platform, one on each side of the upper control
panel (refer to Figure 4.9).
Do not use the platform work lights to drive on public
roadways.
Figure 4.8 – Flashing Light
The light ashes at about one ash per second when
the engine is running.
Light Switch
Figure 4.9 – Platform Work Lights
Bump Guard System
The optional bump guard system is a spring mounted
padded railing below the platform. There are two infrared
lights mounted along the bottom of the platform next
to two infrared sensitive switches. The lights shine on
reectors on the bump guard system and are reected
back to the switches.
If the bump guard comes into contact with a stationary
object, the bump guard moves and one or both of the
light beams is broken, immediately stopping all platform
movement.
18 TB66J – 0083740
Chapter 5 – Gauges and Displays
The aerial platform is equipped with several gauges to
monitor the condition of the machine before and during
operation.
Hour Meter
The hour meter is located on the wiring box on the left
side of the lower controls (refer to Figure 5.1). It measures the accumulated engine operating time.
Hour
Meter
Figure 5.1 – Wiring Box
Engine Temperature Gauge
The temperature gauge is located on the lower control
panel (refer to Figure 5.2).
Ammeter – Cummins, Deutz and Ford Engines
The ammeter is located on the lower control panel (refer
to Figure 5.2). The ammeter displays the level of current
ow from the alternator to the batteries.
After the engine has been running for a few minutes
under normal operating conditions, the ammeter
gauge indicator should read “0.”
Machines with Kubota engines do not have an engine
ammeter gauge.
Voltmeter – General Motors Engines
The voltmeter is located on the engine gauge panel
above the lower controls. The voltmeter displays battery voltage.
After the engine has been running for a few minutes
under normal operating condition, the voltmeter
should indicate between 12.5 and 14 volts.
Engine Air Filter Gauge
The air lter gauge (refer to Figure 5.3) is located on the
engine gauge panel above the lower controls.
Air Filter
Gauge
Machines with Kubota engines do not have an engine
temperature gauge.
Engine
Temperature
Gauge
Ammeter – Cummins, Deutz,
and Ford Engines
Voltmeter – General Motors Engines
Figure 5.2 – Lower Controls
The gauge on liquid cooled engines shows the
temperature of the water and antifreeze mixture in
the engine block.
The gauge on air cooled engines shows the temper-
ature of the engine oil as the oil leaves the lter.
Reset Button
Figure 5.3 – Air Filter Gauge
The air lter gauge measures the air pressure between
the intake manifold and the air lter.
The yellow indicator disk inside the sight glass stays
at its highest level when the engine is turned off.
When the yellow indicator disk reaches the red area,
it’s time to change the lter element.
After changing the lter, press the reset button to reset
the indicator disk to the bottom of the sight glass.
Fuel Gauge
The fuel gauge is located on top of the diesel or gasoline
tank (refer to Figure 5.4). Access the gauge by opening
the door on the right side of the chassis.
TB66J – 0083740 19
Chapter 5 – Gauges and Displays
Fuel Gauge
Hydraulic Fluid Filter Gauge
The uid lter gauge (refer to Figure 5.6) is located on the
return line lter on the top of the reservoir. The reservoir
is behind the door on the left side of the turntable.
During high pump ow situations, the gauge indi-
cates the condition of the lter.
When the needle on the gauge is in the red zone,
its time to change the lter.
Figure 5.4 – Fuel Tank
Read the fuel gauge at the line in the clear plastic
window.
The gauge indicates the fuel tank level in fractions
of a full tank.
Note
Do not run a diesel fuel tank empty. Air in the fuel line
makes the engine hard to start.
LPG tanks have a fuel gauge that has two scales. One
scale measures the fuel level when the tank is mounted
vertical and the other is used when the tank is mounted
horizontal (refer to Figure 5.5).
Horizontal Scale
Filter Gauge
Figure 5.6 – Hydraulic Fluid Filter Gauge
Fluid Level and Temperature Gauge
A sight gauge on the right side of the hydraulic reservoir
displays the level and temperature of the hydraulic uid
(refer to Figure 5.7). The reservoir is behind the door on
the left side of the machine.
Only read the uid level when the aerial platform is in the
stowed position, booms completely down and retracted.
Otherwise, the cylinders act as large reservoirs for hy-
draulic uid making the level appear too low.
The fluid should be between the minimum and
maximum lines.
If the temperature rises above 200°F (93°C) stop
machine operation and let the uid cool before resuming operation.
Fluid Level and
Figure 5.5 – LPG Tank
The LPG tank is mounted horizontally behind the
Temperature Gauge
rear cowling door on the right side of the machine.
Read the horizontal scale to determine the fuel level.
Engine Oil
The engine oil level is measured with a dipstick. The
dipstick is the only way to accurately determine the
engine oil level. The engine oil level should always be
between the add and full marks on the dipstick.
20 TB66J – 0083740
Figure 5.7 – Hydraulic Fluid Filter Gauge
Chapter 6 – Controls
Danger
Pinch points may exist between moving components. Death or serious injury can result from being
trapped between components, buildings, structures,
or other obstacles. Make sure all personnel stand
clear while operating the aerial platform.
Controls to position the platform are located on the
lower control panel on the turntable and on the upper
control panel in the platform.
Controls to drive the aerial platform are located on
the upper control panel only.
Battery Disconnect Switch
The battery disconnect is located behind the door on
the left side of the turntable above the batteries (refer
to Figure 6.1).
Battery Disconnect Switch
The following are located on the lower control panel.
• Emergency stop button
• Control selector switch
• Start switch
• Ground operation switch
• Rotation switch
• Boom elevation switch
• Boom extend/retract switch
• Jib articulation switch
• Boom speed knob
• Platform level switch
• Platform rotation switch
• Engine/emergency power switch
• Throttle switch
• Fuel switch (dual fuel machines)
Emergency Stop Button
The emergency stop button
two-position, red push button.
Push the button inward to disconnect power to all
(refer to Figure 6.2)
is a
control circuits.
Pull the button outward to restore power.
On older machines, the emergency stop is a two-position
toggle switch with a red safety guard.
Figure 6.1 – Battery Disconnect Switch
The battery disconnect removes electrical power from all
electrically controlled functions when in the off position.
Place the switch in the on position to electrically
connect the battery to the electrical system.
Caution
Only authorized personnel should operate the aerial
platform. Unqualied personnel may cause injury
to coworkers or property damage. Lock the battery
disconnect switch in the off position before leaving
the aerial platform unattended.
Turn the battery disconnect switch off to prevent
unauthorized use of the aerial platform.
Lower Controls
The lower controls (refer to Figure 6.2) are located on the
right side of the turntable. Boom and platform functions
can be operated from the lower controls.
Push the guard down over the toggle switch to dis-
connect power to all control circuits
Lift the guard and push the toggle switch up to re-
store power.
Control Selector Switch
Use the control selector switch (refer to Figure 6.2)
to select between the lower control and upper control
operation.
Push the switch upward to operate the aerial platform
from the upper controls.
Push the switch downward to operate the aerial
platform from the lower controls.
Start Switch
The start switch (refer to Figure 6.2) works like an automobile ignition switch.
Hold the switch in the start position until the engine
starts, then release it to on.
If the engine dies, the switch must be turned to off
before it can be turned back to start.
An alarm sounds, when the switch is turned on, to warn
others that the machine engine is being started.
TB66J – 0083740 21
Chapter 6 – Controls
Boom Extend/Retract
Switch
Boom Elevation
Switch
Control Selector
Switch
Boom Speed
Knob
Emergency Stop Button
Platform Rotation
Switch
Platform Level Switch
Rotation Switch
Throttle Switch
Jib Articulation Switch
Figure 6.2 – Lower Controls
Note
On some machines it may be necessary to pause about
three seconds in the on position before going to start so
the starter can engage.
If the platform is to stay in a particular position for a long
time, turn the start switch to off to shut off the engine
and save fuel.
Engine/Emergency
Power Switch
Ground Operation
Switch
Start Switch
Circuit Breaker Reset Button
Boom Elevation Switch
The boom elevation switch (refer to Figure 6.2) is used
to raise or lower the main boom. The switch is spring
returned to the center off position.
Hold the switch up to raise the main boom.
Hold the switch down to lower the main boom.
Ground Operation Switch
The ground operation switch (refer to Figure 6.2) is used
to operate the machine from the lower controls. The
switch is spring returned to the off position.
Hold the ground operation switch upward continually
Boom Extend/Retract Switch
The boom extend/retract switch (refer to Figure 6.2) is
used to extend or retract the booms. The switch is spring
returned to the center off position.
Hold the switch to the left to extend the tip boom.
to operate the machine from the lower controls.
Hold the switch to the right to retract the tip boom.
The engine speed increases when the switch is
held upward.
Jib Articulation Switch
The jib switch (refer to Figure 6.2) is used to raise or
Rotation Switch
The rotation switch (refer to Figure 6.2) is used to ro-
lower the jib. The switch is spring returned to the center
off position.
tate the turntable in a clockwise or counterclockwise
direction. The switch is spring returned to the center
Hold the switch up to raise the jib.
off position.
Hold the switch down to lower the jib.
Hold the switch to the right to rotate the turntable
counterclockwise.
Hold the switch to the left to rotate the turntable
clockwise.
22 TB66J – 0083740
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