Toro Multi Pro 5800 Service Manual

Preface

The purpose of this publication is to provide the service
technician with information for troubleshooting, testing,
and repair of major systems and components on the
Multi Pro 5800 machines serial number above

316000000. Equipment model numbers covered in this
manual include 41393, 41394, 41593 and 41594. All of
these models include a 5 button InfoCenter display on
the control arm. Models 41394 and 41594 comply with
EPA Tier 4 emission regulations. This manual also
supports the optional GeoLink Spray System models
41623, 41624, 41625, 41630 and 41632, and optional
Ultra−Sonic Boom Leveling Kit model 41219.

REFER TO THE OPERA TOR’S MANUAL FOR OPER­ATING, MAINTENANCE, AND ADJUSTMENT
INSTRUCTIONS. Space is provided in Chapter 2 of this
book to insert the Operator ’s Manual, Software Guide
and Parts Catalog for your machine. Additional copies
of these and other product support publications are
available at www.Toro.com.

PART NO. 16232SL

Service Manual

(Machine Serial Numbers Above 316000000)

Multi ProR 5800

This safety symbol means DANGER, WARNING,
or CAUTION, PERSONAL SAFETY INSTRUC­TION. When you see this symbol, carefully read
the instructions that follow. Failure to obey the
instructions may result in personal injury.

NOTE: A NOTE will give general information about the

correct operation, maintenance, service, testing, or re­pair of the machine.

IMPORTANT: The IMPORTANT notice will give im­portant instructions which must be followed to pre­vent damage to systems or components on the
machine.

The Toro Company reserves the right to change product
specifications or this publication without notice.

5 Button InfoCenter Display

E The Toro Company − 2017

This page is intentionally blank.

Multi Pro 5800

Table Of Contents

Chapter 1 − Safety

Safety Instructions 1 − 2..........................

Jacking Instructions 1 − 5.........................

Safety and Instruction Decals 1 − 5................

Chapter 2 − Product Records and Maintenance

Product Records 2 − 1...........................

Maintenance 2 − 1...............................

Equivalents and Conversions 2 − 2................

Torque Specifications 2 − 3.......................

Chapter 6 − Electrical System

General Information 6 − 2........................

Electrical Drawings 6 − 4.........................

Special Tools 6 − 5..............................

InfoCenter Display 6 − 8..........................

Troubleshooting 6 − 29...........................

Electrical System Quick Checks 6 − 38.............

Adjustments 6 − 40..............................

Component Testing 6 − 41........................

Service and Repairs 6 − 95.......................

SafetyProduct Records

and Maintenance

Chapter 3 − Kubota Diesel Engine

Specifications 3 − 2..............................

General Information 3 − 3........................

Adjustments 3 − 4...............................

Service and Repairs 3 − 6........................

KUBOTA WORKSHOP MANUAL, DIESEL ENGINE,

05−E3B SERIES

Chapter 4 − Kubota Gasoline Engine

Specifications 4 − 2..............................

General Information 4 − 3........................

Service and Repairs 4 − 6........................

KUBOTA WORKSHOP MANUAL,

GASOLINE ENGINE WG1605−G−E3

KUBOTA DIAGNOSIS MANUAL − ECM SYSTEM,

GASOLINE ENGINE WG1605−G−E3

Chapter 5 − Hydraulic System

Specifications 5 − 3..............................

General Information 5 − 4........................

Hydraulic Schematic 5 − 9........................

Hydraulic Flow Circuits 5 − 10.....................

Special Tools 5 − 18.............................

Troubleshooting 5 − 22...........................

Testing 5 − 26...................................

Adjustments 5 − 52..............................

Service and Repairs 5 − 53.......................

EATON MODEL 72400 SERVO CONTROLLED
PISTON PUMP REPAIR INFORMATION

EATON MODEL 74318 and 74348 PISTON MOTORS:
FIXED DISPLACEMENT, VALVE PLATE DESIGN
REPAIR INFORMATION

PARKER TORQLINKTM SERVICE PROCEDURE
SAUER/DANFOSS STEERING UNIT TYPE OSPM

SERVICE MANUAL

Chapter 7 − ExcelaRate Spray System

Specifications 7 − 2..............................

General Information 7 − 3........................

Special Tools 7 − 4..............................

ExcelaRate Spray System Diagram 7 − 6...........

ExcelaRate Spray System Operation 7 − 7..........

InfoCenter Display 7 − 9..........................

Troubleshooting 7 − 26...........................

Service and Repairs 7 − 31.......................

Chapter 8 − GeoLink Spray System

Specifications 8 − 2..............................

General Information 8 − 3........................

Special Tools 8 − 5..............................

GeoLink Spray System Diagram 8 − 6..............

GeoLink Spray System Operation 8 − 7............

X25 and X30 Control Console Screens 8 − 11.......

InfoCenter Display 8 − 27.........................

Troubleshooting 8 − 39...........................

Adjustments 8 − 48..............................

Service and Repairs 8 − 51.......................

Chapter 9 − Chassis

Specifications 9 − 2..............................

General Information 9 − 2........................

Service and Repairs 9 − 3........................

Chapter 10 − Ultra Sonic Boom Kit (Optional)

General Information 10 − 2.......................

Hydraulic Schematic 10 − 4.......................

Electrical Schematic 10 − 5.......................

Ultra Sonic Boom System Operation 10 − 6.........

Troubleshooting 10 − 16.........................

Service and Repairs 10 − 19.....................

Chapter 11 − Foldout Drawings

Hydraulic Schematic 11 − 3.......................

Electrical Schematics 11 − 4......................

Wire Harness Drawings 11 − 10...................

Engine

Kubota Diesel

Engine

Kubota Gasoline

System

Hydraulic

System

Electrical

ExcelaRate

Spray System

GeoLink

Spray System

Chassis

Ultra Sonic

Boom System

Multi Pro 5800

Foldout

Drawings

This page is intentionally blank.

Multi Pro 5800

Table of Contents

SAFETY INSTRUCTIONS 2......................

Before Operating 2............................

While Operating 3.............................

Maintenance and Service 4....................

JACKING INSTRUCTIONS 5.....................

SAFETY AND INSTRUCTION DECALS 5..........

Safety

Chapter 1

Safety

Multi Pro 5800 Page 1 − 1 Safety

Safety Instructions

The Multi Pro 5800 Turf Sprayer is designed and tested
to offer safe service when operated and maintained
properly. Although hazard control and accident preven­tion are partially dependent upon the design and config­uration of the machine, these factors are also
dependent upon the awareness, concern and proper
training of the personnel involved in the operation, trans­port, maintenance and storage of the machine. Improp­er use or maintenance of the machine can result in injury

Before Operating

1. Read and un d e r s t a n d t h e c o ntents of the Operator’s
Manual before starting and operating the machine. Be­come familiar with the controls and know how to stop the
machine and engine quickly. Additional copies of the
Operator’s Manual are available on the internet at
www.Toro.com.

2. Keep all shields, safety devices and decals in place.
If a shield, safety device or decal is defective, illegible
or damaged, repair or replace it before operating the
machine. Also tighten any loose nuts, bolts or screws to
ensure machine is in safe operating condition.

or death. To reduce the potential for injury or death,
comply with the following safety instructions.

WARNING

To reduce the potential for injury or death, com­ply with the following safety instructions.

NOTE: All of the interlock switches must be functioning

and adjusted correctly for the engine to start (see Chap­ter 6 − Electrical System in this manual for switch adjust­ment and testing information).

4. Since diesel fuel is flammable, handle it carefully:
A. Store fuel in containers specifically designed for

this purpose.
B. Do not remove machine fuel tank cap while en-

gine is hot or running.

3. Various safety interlocks incorporated into the sys­tem prevent the engine from starting unless the follow­ing conditions are met:

S The spray pump enable switch is in the OFF
position

S If an optional tank rinse kit is installed, the rinse
pump enable switch is in the OFF position

S The seat switch is depressed indicating an Op­erator is present, or the parking brake is engaged

S The neutral switch indicates the traction pump
is in neutral

C. Do not smoke while handling fuel.
D. Fill fuel tank outdoors and only to within an inch of

the top of the tank, not the filler neck. Do not overfill
the fuel tank and wipe up any spilled fuel.

Multi Pro 5800Page 1 − 2Safety

While Operating

Safety

1. Sit on the operators seat while the machine is in mo­tion, or engage the parking brake during stationary oper­ation.

2. The engine will stop running it the vehicle is operated
for more than ten seconds with the parking brake en­gaged.

3. Do not run engine in a confined area without ade­quate ventilation. Exhaust fumes are hazardous and
could possibly be deadly.

4. Do not touch engine, radiator, muffler or exhaust
pipe while engine is running or soon after it is stopped.
These areas could be hot enough to cause burns.

5. Follow spray chemical manufacturer’s recommen­dations for handling precautions, protective equipment
and mixing proportions.

6. Before stopping the engine:
A. Ensure that traction pedal is in the NEUTRAL

position.
B. Engage the parking brake.
C. Set spray pump enable switch to the OFF posi-

tion.
D. If an optional tank rinse kit is installed, set the

rinse pump enable switch to the OFF position

7. Do not park on slopes unless wheels are chocked or

blocked.

Multi Pro 5800 Page 1 − 3 Safety

Maintenance and Service

1. Before servicing or making adjustments, turn spray
pump off, put traction pedal in neutral, stop engine, set
parking brake and remove key from the switch.

2. Prior to servicing sprayer components, determine
what chemical(s) have been used in the sprayer. Follow
precautions and recommendations printed on chemical
container labels or Material Safety Data Sheets when
servicing sprayer components. Use appropriate protec­tive equipment: protective clothing, chemical resistant
gloves and eye protection.

3. Make sure machine is in safe operating condition by
keeping all nuts, bolts and screws tight.

4. Never store the machine or fuel container inside
where there is an open flame, such as near a water heat­er or furnace.

5. Make sure all hydraulic line connectors are tight and
that all hydraulic hoses and lines are in good condition,
before applying pressure to the system.

6. Keep body and hands away from pin hole leaks in hy­draulic lines that eject high pressure hydraulic fluid. Use
cardboard or paper to find hydraulic leaks. Hydraulic
fluid escaping under pressure can penetrate skin and
cause injury. Fluid accidentally injected into the skin
must be surgically removed within a few hours by a doc­tor familiar with this form of injury or gangrene may re­sult.

10.If engine must be running to perform maintenance or
an adjustment, keep clothing, hands, feet and other
parts of the body away from moving parts. Keep by­standers away.

11.Do not overspeed the engine. To assure safety and
accuracy, check maximum engine speed.

12.Shut engine off before checking or adding oil to the
crankcase.

13.Disconnect battery before servicing the machine.
Disconnect negative (−) battery cable first and positive
(+) cable last. If battery voltage is required for trouble­shooting or test procedures, temporarily connect the
battery. Reconnect positive (+) cable first and negative
(−) cable last.

14.Battery acid is poisonous and can cause burns.
Avoid contact with skin, eyes and clothing. Protect your
face, eyes and clothing when working with a battery.

15.Battery gases can explode. Keep cigarettes, sparks
and flames away from the battery.

16.To assure optimum performance and continued
safety of the machine, use genuine Toro replacement
parts and accessories. Replacement parts and acces­sories made by other manufacturers may result in non­conformance with safety standards and the warranty
may be voided.

7. Before disconnecting or performing any work on the
hydraulic system, all pressure in hydraulic system must
be relieved. To relieve system pressure, rotate steering
wheel in both directions after the key switch has been
turned off.

8. If major repairs are ever needed or assistance is de­sired, contact an Authorized Toro Distributor.

9. To reduce potential fire hazard, keep engine area
free of excessive grease, grass, leaves and dirt. Clean
protective screen on machine frequently.

17.When changing attachments, tires or performing
other service, use correct supports, hoists and jacks.
Make sure machine is parked on a solid level floor such
as a concrete floor. Prior to raising the machine, remove
any attachments that may interfere with the safe and
proper raising of the machine. Always chock or block
wheels. Use jack stands or appropriate load holding de­vices to support the raised machine. If the machine is
not properly supported, the machine may move or fall,
which may result in personal injury (see Jacking Instruc­tions in this section).

Multi Pro 5800Page 1 − 4Safety

Jacking Instructions

CAUTION

When changing attachments, tires or perform­ing other service, use correct supports, hoists
and jacks. Make sure machine is parked on a
solid, level surface such as a concrete floor.
Prior to raising machine, remove any attach­ments that may interfere with the safe and prop­er raising of the machine. Always chock or
block wheels. Use jack stands or other ap­propriate load holding devices to support the
raised machine. If the machine is not properly
supported, the machine may move or fall,
which may result in personal injury.

Jacking the Front End

1. Set parking brake and chock both rear tires to pre­vent the machine from moving.

2. Position jack securely under the front axle, directly
beneath the leaf springs (Fig. 1).

1

Figure 1

1. Front jacking points

1

Safety

3. Jack front of machine off the ground.

4. Position jack stands under the front axle as close to
the wheel as possible to support the machine.

Jacking the Rear End

1. Set parking brake and chock both front tires to pre­vent the machine from moving.

2. Place jack securely under the rear most frame sup­ports between the angle welds (Fig. 2).

3. Jack rear of machine off the ground.

4. Position jack stands under the frame to support the
machine.

Safety and Instruction Decals

Numerous safety and instruction decals are affixed to
the Multi Pro 5800. If any decal becomes illegible or
damaged, install a new decal. Part numbers are listed
in your Parts Catalog. Order replacement decals from
your Authorized Toro Distributor.

1

Figure 2

1. Rear jacking points

1

Multi Pro 5800 Page 1 − 5 Safety

This page is intentionally blank.

Multi Pro 5800Page 1 − 6Safety

Chapter 2

Product Records and Maintenance

Table of Contents

PRODUCT RECORDS 1.........................

MAINTENANCE 1..............................

EQUIVALENTS AND CONVERSIONS 2...........

Decimal and Millimeter Equivalents 2............

U.S. to Metric Conversions 2...................

TORQUE SPECIFICATIONS 3...................

Fastener Identification 3.......................

Using a Torque Wrench with an Offset Wrench 3..
Standard Torque for Dry, Zinc Plated and

Steel Fasteners (Inch Series Fasteners) 4......

Standard Torque for Dry, Zinc Plated and

Steel Fasteners (Metric Fasteners) 5..........

Other Torque Specifications 6..................

Conversion Factors 6.........................

Product Records

Insert Operator’s Manual and Parts Catalog for your
Multi Pro 5800 at the end of this chapter. Additionally, if
any optional equipment has been installed to your
sprayer, insert the Installation Instructions, Operator’s
Manuals and Parts Catalogs for those options at the end
of this chapter.

Product Records

and Maintenance

Maintenance

Maintenance procedures and recommended service in­tervals for the Multi Pro 5800 are covered in the Opera­tor’s Manual. Refer to that publication when performing
regular equipment maintenance. Several maintenance
procedures have break−in intervals identified in the Op­erator’s Manual. Refer to the Engine Operator’s Manual
for additional engine specific maintenance procedures.

Multi Pro 5800 Page 2 − 1 Product Records and Maintenance

Equivalents and Conversions

0.09375

Multi Pro 5800Page 2 − 2Product Records and Maintenance

Torque Specifications

Recommended fastener torque values are listed in the
following tables. For critical applications, as determined
by Toro, either the recommended torque or a torque that
is unique to the application is clearly identified and spe­cified in this Service Manual.

These Torque Specifications for the installation and
tightening of fasteners shall apply to all fasteners which
do not have a specific requirement identified in this Ser­vice Manual. The following factors shall be considered
when applying torque: cleanliness of the fastener, use
of a thread sealant (e.g. Loctite), degree of lubrication
on the fastener, presence of a prevailing torque feature,
hardness of the surface underneath the fastener’s head
or similar condition which affects the installation.

Fastener Identification

As noted in the following tables, torque values should be
reduced by 25% for lubricated fasteners to achieve
the similar stress as a dry fastener. Torque values may
also have to be reduced when the fastener is threaded
into aluminum or brass. The specific torque value
should be determined based on the aluminum or brass
material strength, fastener size, length of thread en­gagement, etc.

The standard method of verifying torque shall be per­formed by marking a line on the fastener (head or nut)
and mating part, then back off fastener 1/4 of a turn.
Measure the torque required to tighten the fastener until
the lines match up.

Product Records

and Maintenance

Grade 1 Grade 5 Grade 8

Inch Series Bolts and Screws

Figure 1

Using a Torque Wrench with an Offset Wrench

Use of an offset wrench (e.g. crowfoot wrench) will affect
torque wrench calibration due to the effective change of
torque wrench length. When using a torque wrench with
an offset wrench, multiply the listed torque recommen­dation by the calculated torque conversion factor (Fig.

3) to determine proper tightening torque. Tightening
torque when using a torque wrench with an offset
wrench will be lower than the listed torque recommen­dation.

Example: The measured effective length of the torque
wrench (distance from the center of the handle to the
center of the square drive) is 18”.

The measured effective length of the torque wrench with
the offset wrench installed (distance from the center of
the handle to the center of the offset wrench) is 19”.

Class 8.8 Class 10.9

Metric Bolts and Screws

Figure 2

If the listed torque recommendation for a fastener is
from 76 to 94 ft−lb, the proper torque when using this
torque wrench with an offset wrench would be from 72
to 89 ft−lb.

(effective length of

torque wrench)

A

B

(effective length of torque

wrench + offset wrench)

TORQUE CONVERSION FACTOR = A / B

Torque wrenchOffset wrench

The calculated torque conversion factor for this torque
wrench with this offset wrench would be 18 / 19 = 0.947.

Multi Pro 5800 Page 2 − 3 Product Records and Maintenance

Figure 3

Standard Torque for Dry, Zinc Plated and Steel Fasteners (Inch Series Fasteners)

Thread Size

# 6 − 32 UNC

# 6 − 40 UNF 17 + 2 190 + 20 25 + 2 280 + 20

# 8 − 32 UNC

# 8 − 36 UNF 31 + 3 350 + 30 43 + 4 485 + 45

# 10 − 24 UNC

# 10 − 32 UNF 48 + 4 540 + 45 68 + 6 765 + 70

1/4 − 20 UNC 48 + 7 53 + 7 599 + 79 100 + 10 1125 + 100 140 + 15 1580 + 170

1/4 − 28 UNF 53 + 7 65 + 10 734 + 113 115 + 10 1300 + 100 160 + 15 1800 + 170

5/16 − 18 UNC 115 + 15 105 + 17 1186 + 169 200 + 25 2250 + 280 300 + 30 3390 + 340

5/16 − 24 UNF 138 + 17 128 + 17 1446 + 192 225 + 25 2540 + 280 325 + 30 3670 + 340

3/8 − 16 UNC 16 + 2 16 + 2 22 + 3 30 + 3 41 + 4 43 + 4 58 + 5

Grade 1, 5, &

8 with Thin

Height Nuts

in−lb in−lb N−cm in−lb N−cm in−lb N−cm

10 + 2 13 + 2 147 + 23

13 + 2 25 + 5 282 + 30

18 + 2 30 + 5 339 + 56

ft−lb ft−lb N−m ft−lb N−m ft−lb N−m

SAE Grade 1 Bolts, Screws, Studs, &

Sems with Regular Height Nuts

(SAE J995 Grade 2 or Stronger Nuts)

SAE Grade 5 Bolts, Screws, Studs, &

Sems with Regular Height Nuts

(SAE J995 Grade 2 or Stronger Nuts)

15 + 2 170 + 20 23 + 2 260 + 20

29 + 3 330 + 30 41 + 4 460 + 45

42 + 4 475 + 45 60 + 6 675 + 70

SAE Grade 8 Bolts, Screws, Studs, &

Sems with Regular Height Nuts

(SAE J995 Grade 5 or Stronger Nuts)

3/8 − 24 UNF 17 + 2 18 + 2 24 + 3 35 + 3 47 + 4 50 + 4 68 + 5

7/16 − 14 UNC 27 + 3 27 + 3 37 + 4 50 + 5 68 + 7 70 + 7 95 + 9

7/16 − 20 UNF 29 + 3 29 + 3 39 + 4 55 + 5 75 + 7 77 + 7 104 + 9

1/2 − 13 UNC 30 + 3 48 + 7 65 + 9 75 + 8 102 + 11 105 + 10 142 + 14

1/2 − 20 UNF 32 + 3 53 + 7 72 + 9 85 + 8 115 + 11 120 + 10 163 + 14

5/8 − 11 UNC 65 + 10 88 + 12 119 + 16 150 + 15 203 + 20 210 + 20 285 + 27

5/8 − 18 UNF 75 + 10 95 + 15 129 + 20 170 + 15 230 + 20 240 + 20 325 + 27

3/4 − 10 UNC 93 + 12 140 + 20 190 + 27 265 + 25 359 + 34 375 + 35 508 + 47

3/4 − 16 UNF 115 + 15 165 + 25 224 + 34 300 + 25 407 + 34 420 + 35 569 + 47

7/8 − 9 UNC 140 + 20 225 + 25 305 + 34 430 + 45 583 + 61 600 + 60 813 + 81

7/8 − 14 UNF 155 + 25 260 + 30 353 + 41 475 + 45 644 + 61 660 + 60 895 + 81

NOTE: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners

on the fastener size, the aluminum or base material

strength, length of thread engagement, etc.
are defined as threads coated with a lubricant such as
oil, graphite or thread sealant (e.g. Loctite).

NOTE: The nominal torque values listed above for

Grade 5 and 8 fasteners are based on 75% of the mini­NOTE: Torque values may have to be reduced when
installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based

mum proof load specified in SAE J429. The tolerance is

approximately +

10% of the nominal torque value. Thin

height nuts include jam nuts.

Multi Pro 5800Page 2 − 4Product Records and Maintenance

Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners)

Thread Size

Class 8.8 Bolts, Screws, and Studs with

Regular Height Nuts

(Class 8 or Stronger Nuts)

Class 10.9 Bolts, Screws, and Studs with

Regular Height Nuts

(Class 10 or Stronger Nuts)

M5 X 0.8 57 + 5 in−lb 640 + 60 N−cm 78 + 7 in−lb 885 + 80 N−cm

M6 X 1.0 96 + 9 in−lb 1018 + 100 N−cm 133 + 13 in−lb 1500 + 150 N−cm
M8 X 1.25 19 + 2 ft−lb 26 + 3 N−m 27 + 2 ft−lb 36 + 3 N−m
M10 X 1.5 38 + 4 ft−lb 52 + 5 N−m 53 + 5 ft−lb 72 + 7 N−m

M12 X 1.75 66 + 7 ft−lb 90 + 10 N−m 92 + 9 ft−lb 125 + 12 N−m

M16 X 2.0 166 + 15 ft−lb 225 + 20 N−m 229 + 22 ft−lb 310 + 30 N−m
M20 X 2.5 325 + 33 ft−lb 440 + 45 N−m 450 + 37 ft−lb 610 + 50 N−m

NOTE: Reduce torque values listed in the table above
by 25% for lubricated fasteners. Lubricated fasteners

on the fastener size, the aluminum or base material

strength, length of thread engagement, etc.
are defined as threads coated with a lubricant such as
oil, graphite or thread sealant (e.g. Loctite).

NOTE: The nominal torque values listed above are
NOTE: Torque values may have to be reduced when

installing fasteners into threaded aluminum or brass.
The specific torque value should be determined based

based on 75% of the minimum proof load specified in

SAE J1199. The tolerance is approximately +

nominal torque value.

10% of the

Product Records

and Maintenance

Multi Pro 5800 Page 2 − 5 Product Records and Maintenance

Other Torque Specifications

SAE Grade 8 Steel Set Screws

Recommended Torque

Thread Size

Square Head Hex Socket

1/4 − 20 UNC 140 + 20 in−lb 73 + 12 in−lb

5/16 − 18 UNC 215 + 35 in−lb 145 + 20 in−lb

3/8 − 16 UNC 35 + 10 ft−lb 18 + 3 ft−lb
1/2 − 13 UNC 75 + 15 ft−lb 50 + 10 ft−lb

Thread Cutting Screws

(Zinc Plated Steel)

Type 1, Type 23 or Type F

Thread Size Baseline Torque*

No. 6 − 32 UNC 20 + 5 in−lb

Wheel Bolts and Lug Nuts

Thread Size

7/16 − 20 UNF

Grade 5

1/2 − 20 UNF

Grade 5

M12 X 1.25

Class 8.8

M12 X 1.5

Class 8.8

** For steel wheels and non−lubricated fasteners.

Thread Cutting Screws

(Zinc Plated Steel)

Thread

Size

No. 6 18 20 20 + 5 in−lb

Threads per Inch
Type A Type B

Recommended Torque**

65 + 10 ft−lb 88 + 14 N−m

80 + 10 ft−lb 108 + 14 N−m

80 + 10 ft−lb 108 + 14 N−m

80 + 10 ft−lb 108 + 14 N−m

Baseline Torque*

No. 8 − 32 UNC 30 + 5 in−lb

No. 10 − 24 UNC 38 + 7 in−lb

1/4 − 20 UNC 85 + 15 in−lb

5/16 − 18 UNC 110 + 20 in−lb

3/8 − 16 UNC 200 + 100 in−lb

Conversion Factors

in−lb X 11.2985 = N−cm N−cm X 0.08851 = in−lb

ft−lb X 1.3558 = N−m N−m X 0.7376 = ft−lb

No. 8 15 18 30 + 5 in−lb
No. 10 12 16 38 + 7 in−lb
No. 12 11 14 85 + 15 in−lb

* Hole size, material strength, material thickness & finish
must be considered when determining specific torque
values. All torque values are based on non−lubricated
fasteners.

Multi Pro 5800Page 2 − 6Product Records and Maintenance

Table of Contents

SPECIFICATIONS 2............................

GENERAL INFORMATION 3.....................

Operator’s Manual 3..........................

Kubota Workshop Manual 3....................

ADJUSTMENTS 4..............................

Adjust Throttle Cable 4........................

SERVICE AND REPAIRS 6......................

Fuel System 6................................

Air Cleaner 8.................................

Exhaust System 10...........................

Radiator 12..................................

Engine 16....................................

Removal 16.................................

Installation 19...............................

Flywheel Coupler 22...........................

KUBOTA WORKSHOP MANUAL, DIESEL ENGINE,

05−E3B SERIES

Chapter 3

Kubota Diesel Engine

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 1 Kubota Diesel Engine

Specifications

Item Description

Make / Designation V1505−E3B, Kubota, 4−Cycle, 4 Cylinder,

Bore x Stroke 3.07 in x 3.09 in (78 mm x 78.4 mm)

Total Displacement 91.4 in3 (1498 cc)

Compression Ratio 23:1

Firing Order 1 − 3 − 4 − 2 (numbers start at fan end)

Low Idle (no load) 1200 to 1300 RPM

High Idle (no load) 3050 to 3150 RPM

Direction of Rotation Counterclockwise (Viewed from Flywheel)

Fuel No. 2−D Diesel Fuel (ASTM D975)

Fuel Injection Pump Bosch MD Type Mini Pump

Injection Nozzles Mini Nozzle (DNOPD)

Fuel Tank Capacity 12 U.S. gallons (45 liters)

Governor Centrifugal Mechanical

Water Cooled, Diesel Engine

Engine Oil API Classification CH−4, CI−4 or Higher

Oil Pump Trochoid Type

Engine Oil Capacity (approximate) 4.9 U.S. quarts (4.6 liters) with Filter

Cooling System Capacity (approximate − including reserve tank) 5.9 U.S. quarts (5.6 liters)

Starter 12 VDC, 1.2 KW

Alternator/Regulator 12 VDC 60 AMP

Engine Dry Weight (approximate) 242 lbs (110 kg)

(see Operator’s Manual for viscosity recommendations)

Multi Pro 5800−DPage 3 − 2Kubota Diesel Engine

General Information

This Chapter gives information about specifications, ad­justments and repair of the Kubota Diesel engine that
powers the Multi Pro 5800−D.

Operator ’s Manual

The Operator’s Manual provides information regarding
the operation, general maintenance and maintenance
intervals for the Kubota diesel engine that powers your
Multi Pro 5800−D. Refer to that publication for additional
information when servicing the machine.

Kubota Workshop Manual

Engine

Kubota Diesel

General maintenance procedures are described in your
Operator’s Manual. Information on engine testing, dis­assembly and reassembly is identified in the Kubota
Workshop Manual Diesel Engine, 05−E3B Series that i s
included at the end of this chapter. Make sure that the
correct engine manual is used when servicing the en­gine on your Multi Pro.

Most engine repairs and adjustments require tools
which are commonly available in many service shops.
Special tools are described in the Kubota Workshop
Manual Diesel Engine, 05−E3B Series. The use of some
specialized test equipment is explained. However, the
cost of the test equipment and the specialized nature of
some repairs may dictate that the work be done at an
engine repair facility.

Multi Pro 5800−D Page 3 − 3 Kubota Diesel Engine

Adjustments

Adjust Throttle Cable

Proper engine RPM and machine performance is de­pendent upon proper adjustment of throttle cable.

NOTE: The throttle cable swivel should be positioned
in the lowest hole in the speed control lever.

1

5

2

1. Move throttle control lever on control console fully
forward to FAST position.

2. Check position of the engine speed control lever on
fuel injection pump. The speed control lever should be
contacting the high speed screw when the throttle con­trol lever is in the fully forward FAST position.

3. If necessary, throttle cable can be adjusted by loos­ening cable clamp screw and repositioning cable until
speed control lever contacts high speed screw when the
throttle control lever is in the fully forward FAST position.
Tighten cable clamp screw after adjustment has been
completed.

4. After securing cable clamp, make sure that cable ad­justment is still correct. Ensure the throttle swivel moves
freely and the speed control lever travels fully from stop
to stop.

VIEW FROM ABOVE

1. Throttle cable

2. High speed screw

3. Speed control lever

3

4

Figure 1

4. Throttle swivel

5. Cable clamp

Multi Pro 5800−DPage 3 − 4Kubota Diesel Engine

This page is intentionally blank.

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 5 Kubota Diesel Engine

Service and Repairs

Fuel System

10 to 12 in−lb

(1 N−m)

17

13 to 65 in−lb

(1 to 7 N−m)

10

9
6

8

15
14

12

16

18

19

13

20

11

Apply

Thread

Sealant

28

27
26

25

22

FROM

FUEL

RAIL

21

24

TO

5

16

4

7

6

23

INJECTION

PUMP

1

2

25 in−lb (3 N−m)

1. Fuel tank

2. Base

3. Flange nut (2)

4. Carriage bolt (2)

5. Rubber bumper (2)

6. Flat washer (6)

7. Flange nut (2)

8. Clamp (2)

9. Cap screw (2)

10. Fuel fill cap

3

RIGHT

FRONT

Figure 2

11. Gasket

12. Fuel pickup/level sender

13. Fuel pickup/level sender cap

14. Tank cover

15. Flange head screw (4)

16. Hose clamp (6)

17. Hose clamp (2)

18. Fuel hose − return

19. Fuel hose − supply

20. Fuel pump

21. Fuel pump clamp

22. Fuel hose − supply

23. Fuel hose − supply

24. Elbow fitting

25. Fuel filter/separator

26. Straight fitting

27. Bracket

28. Flange head screw (2)

Multi Pro 5800−DPage 3 − 6Kubota Diesel Engine

Fuel Tank Installation (Fig. 2)

DANGER

Because diesel fuel is highly flammable, use
caution when storing or handling it. Do not
smoke while filling the fuel tank. Do not fill fuel
tank while engine is running, hot or when ma­chine is in an enclosed area. Always fill fuel tank
outside and wipe up any spilled fuel before start­ing the engine. Store fuel in a clean, safety−ap­proved container and keep cap in place. Use die­sel fuel for the engine only; not for any other
purpose.

Check Fuel Lines and Connections

Check fuel lines and connections periodically as recom­mended in the Operator’s Manual. Check lines for dete­rioration, damage, leaks or loose connections. Replace
hoses, clamps and connections as necessary.

Empty and Clean Fuel Tank

Empty and clean the fuel tank if the fuel system be­comes contaminated or if the machine is to be stored for
an extended period.

1. If fuel hoses were removed from machine, route fuel
hoses through machine as recorded during removal.
Make sure that clearance exists between fuel hoses and
machine components along full length of hoses.

2. Secure fuel tank to machine with two (2) clamps at
base. Tighten clamp fasteners to 25 in−lbs (3 N−m).

3. Install fuel pickup/level sender if previously removed
from tank. Tighten fuel pickup/level sender cap from 13
to 65 in−lbs (1 to 7 N−m).

4. Connect fuel hoses to top of fuel tank and secure
with hose clamps.

5. Connect the fuel pickup/level sender to the machine
wire harness.

6. Install fuel tank cover and tighten cover screws from
10 to 12 in−lbs (1 N−m).

7. Fill fuel tank and bleed air from the fuel system (see
machine Operator’s Manual).

8. Start engine and check fuel line connections for
leaks.

Engine

Kubota Diesel

To clean fuel tank, flush tank out with clean solvent.
Make sure tank is free of contaminates and debris.

Fuel Tank Removal (Fig. 2)

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Use a fuel transfer pump to remove fuel from the fuel
tank and into a suitable container.

3. Remove the fuel tank cover.

4. Disconnect the fuel pickup/level sender from the ma­chine wire harness.

5. Loosen hose clamps that secure supply and return
hoses to top of tank. Remove hoses from tank.

6. Remove two (2) fuel tank clamps from base and re­move fuel tank from machine. Check condition of fuel
tank rubber bumpers and replace if worn or damaged.

7. If necessary, remove fuel pickup/level sender from
tank. Check condition of fuel pickup/level sender gasket
and replace if worn or damaged. See Fuel Pickup/Level
Sender in Chapter − 6 Electrical System for testing infor­mation.

8. If necessary, remove fuel hoses from machine.
Record fuel hose routing for assembly purposes.

Multi Pro 5800−D Page 3 − 7 Kubota Diesel Engine

Air Cleaner

1

2

5

6

3

4

15

7

14

9

RIGHT

FRONT

1. Cap

2. Hose clamp

3. Flange head screw

4. Clamp

5. Flange nut (2)

8

13

9

9

10

11

12

Figure 3

6. Bracket

7. Flange nut

8. Hose

9. Hose clamp (3)

10. Flange head screw (2)

11. Air cleaner mount

12. Flange nut (2)

13. Hose

14. Air cleaner assembly

15. U−Bolt

Multi Pro 5800−DPage 3 − 8Kubota Diesel Engine

Removal (Fig. 3)
NOTE: For air cleaner maintenance information, see

the machine Operator’s Manual.

1. Raise passenger seat to access air cleaner assem­bly.

2. Remove air cleaner components as needed.

Installation (Fig. 3)
IMPORTANT: Any leaks in the air filter system will

cause serious engine damage. Make sure that all air
cleaner components are in good condition and are
properly secured during installation.

1. Assemble air cleaner system. Make sure that vacua­tor valve on air cleaner cover points downward after as­sembly (Fig. 4).

1

1. Air cleaner housing

2. Air cleaner element

2

Figure 4

3. Air cleaner cover

4. Vacuator valve

3

4

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 9 Kubota Diesel Engine

Exhaust System

RIGHT

FRONT

13

16

9

15

7

12
14

12

9

4

3

2

1. Exhaust pipe

2. Cap screw (4)

3. Lock washer (4)

4. Gasket

5. Muffler

6. Muffler clamp (2)

9

8

5

9

8

7

6

1

111112

10

9

Figure 5

7. Cap screw (2)

8. Flange head screw (2)

9. Flat washer (6)

10. Hanger (2)

11. Rubber hanger (3)

12. Flange nut (3)

13. Tail pipe

14. Hanger

15. Flange head screw

16. Flange nut

CAUTION

The muffler and exhaust system may be hot. To
avoid possible burns, allow the engine and ex­haust system to cool before working on the ex­haust system.

Multi Pro 5800−DPage 3 − 10Kubota Diesel Engine

Removal (Fig. 5)

Installation (Fig. 5)

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Remove the rear undercarriage shroud from the ma­chine (see Undercarriage Shrouds in Chapter 9 − Chas­sis in this manual).

3. Support muffler from below to prevent it from falling.

4. Remove exhaust system components as required.
During removal, note location and orientation of fasten­ers, rubber hangers, clamps and brackets.

5. Locate and discard gasket between exhaust pipe
and header if exhaust pipe is disconnected from header.
Clean gasket surfaces on engine exhaust manifold and
exhaust pipe.

1. If exhaust pipe was removed from engine, use a new
gasket and install exhaust pipe and fasteners finger
tight.

2. Install all remaining exhaust system components in­cluding hangers, clamps and brackets finger tight.

3. Tighten exhaust system components i n the following
order:

A. Tighten fasteners securing exhaust pipe to ex­haust header.

B. Tighten exhaust system hanger and bracket fas­teners. DO NOT tighten muffler clamps at this time.

C. Position the tailpipe so the outlet is parallel to the
ground and tighten muffler clamps.

4. Install the rear undercarriage shroud to the machine
(see Undercarriage Shrouds in Chapter 9 − Chassis in
this manual).

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 11 Kubota Diesel Engine

Radiator

3

1

5
6

1. Console assembly

2. Seat belt bracket assembly (2)

Figure 6

3. Carriage screw (12)

4. Flange nut (16)

2

3

5

4

4

5. Flange head screw (4)

6. Radiator

2

4

Removal

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Remove the seats and hinged seat panels from the
seat box (see Seats in Chapter 9 − Chassis in this manu­al).

3. Remove the undercarriage shrouds from the ma­chine (see Undercarriage Shrouds in Chapter 9 − Chas­sis in this manual).

CAUTION

Do not open radiator cap or drain coolant if the
radiator or engine is hot. Pressurized, hot cool­ant can escape and cause burns. Ethylene−gly­col antifreeze is poisonous. Dispose of coolant
properly or store it in a properly labeled contain­er away from children and pets.

4. Drain coolant from radiator (see machine Operator’s
Manual). The coolant drain valve is located under the
passenger seat, in the lower right corner of the radiator .

5. Loosen hose clamps that secure the upper and lower
radiator hoses to the radiator and disconnect the hoses
from the radiator.

6. Loosen hos e clamp that secures overflow hose to ra­diator cap flange. Remove overflow hose from radiator.

7. Remove carriage screws and flange nuts that secure
seat belt bracket assemblies to seat box and remove
both bracket assemblies from machine (Fig.6).

8. Remove fasteners that secure console assembly to
seat box (Fig. 6). Carefully pivot console assembly rear­ward and to the right to allow radiator access. Take care
to not damage the wire harness or throttle cable. Sup­port console to prevent it from shifting, falling, or hang­ing from wire harness or throttle cable.

Multi Pro 5800−DPage 3 − 12Kubota Diesel Engine

28

27

29

30

31

32

31

33

23
24

25
26

13

12

2

3

1

10

4

9

5

11

14
11

15

Engine

Kubota Diesel

RIGHT

FRONT

1. Radiator

2. Foam seal (4)

3. Foam seal

4. Foam seal (2)

5. Foam seal

6. Hose clamp (4)

7. Upper radiator hose

8. Lower radiator hose

9. Lower fan shroud

10. Upper fan shroud

11. Flat washer (8)

22

21

20

12. Lock washer (4)

13. Cap screw (4)

14. Cap screw (2)

15. Flange nut (2)

16. Iso−mount (2)

17. Pop rivet (4)

18. Heat baffle − RH

19. Heat baffle − LH

20. Flange nut (2)

21. Fan shroud and oil cooler

22. Cap screw (4)

Figure 7

16
17

18

7

6

4

8

6

17

19

23. Cap screw (2)

24. Lock washer (6)

25. Flat washer (6)

26. Bracket (2)

27. Flange nut (2)

28. Cap screw (2)

29. Overflow bottle bracket

30. Hose (vent)

31. Hose clamp (3)

32. Overflow bottle

33. Hose (radiator)

9. Remove four (4) cap screws (Fig. 7 item 13), lock
washers and flat washers that secure fan shroud as­sembly to radiator.

10.Remove two (2) cap screws (Fig. 7 item 14), flat
washers and flange nuts to separate the fan shroud
halves and carefully remove the upper fan shroud from
the machine.

Multi Pro 5800−D Page 3 − 13 Kubota Diesel Engine

11.Remove six (6) cap screws (Fig. 7 items 22 and 23),
lock washers and flat washers that secure front radiator
shroud and oil cooler (Fig. 7 item 21) to radiator.

12.Remove two (2) flange nuts (Fig. 7 item 20) that se­cure the iso−mounts on the bottom of the radiator to the
machine frame.

13.Carefully lift radiator up and out of the machine.

14.Inspect radiator hoses and rubber iso−mounts. Re­place worn or damaged components as necessary.

15.,Inspect foam radiator shroud seals and foam radia­tor seals in machine frame. Replace any foam seals that
are damaged or deteriorated.

Installation

6. Connect lower and upper radiator hoses to the radia­tor. Secure hoses with hose clamps.

7. Carefully pivot console assembly back in position
taking care to not damage wire harness or throttle cable.
Install fasteners to secure console assembly to seat box
assembly (Fig. 6).

8. Secure both seat belt bracket assemblies to seat bo x
with carriage screws and flange nuts (Fig. 6).

1. Position lower fan shroud below fan.

2. Carefully lower radiator into the machine. Secure
iso−mounts on the bottom of the radiator to the machine
frame with two (2) flange nuts.

3. Secure radiator to front radiator shroud and oil cooler
(Fig. 7 item 21) with six (6) cap screws (Fig. 7 items 22
and 23), lock washers and flat washers.

4. Secure upper fan shroud to lower fan shroud with
cap screws (Fig. 7 item 14), flat washers and flange
nuts.

5. Secure fan shroud assembly to radiator with four (4)
cap screws (Fig. 7 item13), lock washers and flat wash­ers. Make sure that clearance exists between fan
shrouds and fan at all points before tightening fasteners.

9. Fit overflow hose to radiator flange and secure with
hose clamp. Make sure overflow hose is not kinked.

10.Fill radiator with coolant (see machine Operator ’s
Manual)

11. Check position of electrical wires, hydraulic hoses
and control cables for proper clearance with rotating,
high temperature and moving components.

12.Start engine and check for proper operation. Check
all coolant hose connections for leaks.

13.Install the undercarriage shrouds to the machine
(see Undercarriage Shrouds in Chapter 9 − Chassis in
this manual).

14.Install the seats and hinged seat panels to the seat
box (see Seats in Chapter 9 − Chassis in this manual).

Multi Pro 5800−DPage 3 − 14Kubota Diesel Engine

This page is intentionally blank.

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 15 Kubota Diesel Engine

Engine

11

12

13

1

2

2

5
8
7

12

11

4

3

5
6

7

RIGHT

FRONT

1. Engine assembly

2. Cap screw (4)

3. Lock washer (8)

4. Cap screw (8)

5. Cap screw (8)

6. Rear engine mount bracket (2)

7. Engine mount (4)

8. Front left engine mount

9. Snubbing washer (4)

The following engine removal and installation proce­dures describe lifting and lowering the engine out from
above the machine.

Removal (Fig. 8)

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Disconnect negative (−) and then positive (+) battery
cables from the battery.

3. Remove battery and battery tray from machine.

9

9

10

10

Figure 8

10. Flange nut (12)

11. Cap screw (8)

12. Lock washer (8)

13. Front right engine mount

4. Remove the front fenders.

5. Remove the radiator (see Radiator in this chapter).

6. Detach the air cleaner hose from the R.O.P.S. bar
(see Air Cleaner in this chapter).

7. Loosen the hose clamp at the intake manifold of the
engine and disconnect the air cleaner hose from the en­gine manifold (see Air Cleaner in this chapter).

8. Remove exhaust system from engine (see Exhaust
System Removal in this chapter).

Multi Pro 5800−DPage 3 − 16Kubota Diesel Engine

3

7

6

5

3

4

3

9

4

2

1

10

12

4

3

13

4

8

6

3

11

Engine

Kubota Diesel

1. Access panel

2. Seat base − front

3. Washer head screw (20)

4. Flange nut (20)

5. Seat base − RH

6. Support strap (2)

7. Cross member

8. Engine shroud

9. Cross member support − RH

9. Depending on the type of engine hoist you use, you
may wish to remove the R.O.P .S. bar from the machine.

10.Remove spray tank (see Spray Tank in the Spray
System chapters in this manual).

11.Remove engine shroud from back of seat base
(Fig. 9).

12.Label the wire harness connector at the glow plug
controller attached to the front seat base panel (Fig. 9).

13.Label the wire harness connectors at the relays and
ground terminal block attached to the left side seat base
panel.

14.Remove the fuse block from the mounting bracket on
the left side seat base panel.

Figure 9

10. Cross member support − LH

11. Seat base − LH

12. Glow plug controller

13. Fuse block

15.Remove seat base panels (left side, right side and
front), rear cross member and cross member supports
from machine (Fig. 9).

CAUTION

Hydraulic pump assembly weighs approximate­ly 72 pounds (33 kg). Make sure that pump as­sembly is well supported (from above or below)
during engine removal.

16.Detach hydraulic pump assembly from engine (see
Piston (Traction) Pump in Chapter 4 − Hydraulic System
in this manual).

Multi Pro 5800−D Page 3 − 17 Kubota Diesel Engine

17.Label and disconnect wire harness connectors at the
following locations:

A. Remove positive battery cable and fusible link
connector from st a r t e r m o t o r s o l e n oid stu d ( F i g . 10).

B. Disconnect wire harness connector from starter
motor.

3

1

C. Remove cap screw and lock washer that secure
negative battery cable and wire harness ground wire
to engine block (Fig. 10).

D. Remove wire harness connector from glow plug
terminal (Fig. 11).

E. Disconnect wire harness connector from temper­ature sender (Fig. 11).

F. Remove cable from alternator stud and discon­nect wire harness connector from alternator
(Fig. 12).

G. Disconnect wire harness connector from oil pres­sure switch.

H. Disconnect wire harness connector from fuel
stop solenoid (Fig. 13).

18.Clamp fuel supply hose after the fuel/water separa­tor to prevent leakage (Fig. 13). Disconnect fuel supply
hose from the fuel injector pump on engine and fuel re­turn hose from the fuel rail. Position disconnected fuel
hoses away from engine.

2

4

Figure 10

1. Starter motor stud

2. Negative battery cable

3. Harness ground wire

4. Fusible link connector

1

2

Figure 11

1. Temperature sender 2. Glow plug terminal

19.Remove throttle cable from injector pump (Fig. 13):
A. Loosen screw that secures cable stop on throttle

cable. Slide cable stop from cable.
B. Loosen cable clamp and remove throttle cable

from under clamp.
C. Slide cable end out of swivel and position throttle

cable away from the engine.

20.Record location of any cable ties used to secure the

wiring harness, fuel lines or hydraulic hoses to the en­gine assembly. Remove cable ties attached to engine
assembly.

21.Remove flange nuts, snubbing washers and cap

screws securing the engine brackets to engine mounts
(Fig. 8).

2

3

1. Alternator

2. Alternator stud

1

Figure 12

3. Harness connector

Multi Pro 5800−DPage 3 − 18Kubota Diesel Engine

CAUTION

2

Make sure that hoist or lift used to remove en­gine can properly support engine. Engine as­sembly weighs approximately 275 pounds
(125 kg).

IMPORTANT: Make sure to not damage the engine,
fuel hoses, hydraulic lines, electrical harness or
other parts while removing the engine assembly.

22.Using a hoist and the lifting lugs provided on the en­gine, carefully lift the engine from the machine.

23.If necessary, remove engine brackets, pump
adapter and flywheel coupler from the engine, or engine
mounts from frame.

Installation (Fig. 8)

1. Park machine on a level surface and engage parking
brake.

2. Make sure that all parts removed from the engine
during maintenance or rebuilding (including engine
mount brackets) are reinstalled to the engine assembly .

3. If engine mounts were removed from frame, secure
mounts to frame with cap screws and flange nuts.

IMPORTANT: Make sure to not damage the engine,
fuel hoses, hydraulic lines, electrical harness or
other parts while installing the engine assembly.

CAUTION

Make sure that hoist or lift used to remove en­gine can properly support engine. Engine as­sembly weighs approximately 275 pounds
(125 kg).

4. Using a hoist and the lifting lugs provided on the en­gine, carefully lift the engine into the machine. Insert cap
screws through engine brackets and motor mounts from
above. Install snubbing washers and flange nuts on cap
screws and tighten (Fig. 8).

1

4

1. Fuel stop solenoid

2. Fuel supply hose

3. Water/fuel filter

5. Connect throttle cable to injector pump (Fig. 13):
A. Position throttle cable to engine.
B. Insert the throttle cable end into the swivel in

speed control lever. Slide cable stop onto cable end
and secure with screw.

C. Position throttle cable under cable clamp.
D. Adjust throttle control cable (see Adjust Throttle

Control Cable in the Adjustments section of this
chapter).

6. Connect fuel supply hose to the fuel injector pump

and fuel return hose to fuel rail on engine (Fig. 13). Re­move clamp from fuel hose that was used to prevent
leakage during engine removal.

7. Using labels placed during engine removal, attach all

engine electrical connections (see step 17. in removal
procedure).

8. Install hydraulic pump assembly to engine (see Pis-

ton (Traction) Pump Installation in Chapter 4 − Hydraulic
System in this manual).

9. Install seat base panels (left side, right side and

front), rear cross member and cross member supports
to machine (Fig. 9).

5

6

3

Figure 13

4. Throttle cable

5. Cable clamp

6. Cable stop

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 19 Kubota Diesel Engine

10.Install fuse block to left side seat base panel.

17.Install the radiator (see Radiator in this chapter).

11. Using labels placed during engine removal, attach
wire harness connections at glow plug controller (front
seat base panel) and relays (left side seat base panel.

12.Install engine shroud to back of seat base (Fig. 9).

13.Install spray tank (see Spray Tank in the Spray S y s­tem chapters in this manual).

14.If previously removed, install the R.O.P.S. bar to the
machine.

15.Install exhaust system (see Exhaust System Instal­lation in this chapter).

IMPORTANT: Any leaks in the air intake system will
cause serious engine damage. Make sure that all air
cleaner components are in good condition and are
properly secured during assembly.

16.Install air cleaner hoses to engine manifold and
R.O.P.S. bar (see Air Cleaner in this chapter). Make
sure that hose clamps are properly tightened.

18.Install cable ties to secure the wiring harness, fuel
lines and hydraulic hoses to the engine assembly using
notes taken during engine removal.

19.Install the front fenders.

20.Install battery and battery tray to machine.

21.Properly fill the radiator with coolant (see machine
Operator’s Manual).

22.Check engine oil level and adjust if necessary.

23.Connect positive (+) and then negative (−) battery
cables to the battery.

24.Check position of wires, fuel lines, hydraulic hoses
and cables for proper clearance with rotating, high tem­perature and moving components.

25.Start engine and check for proper operation. Check
all hose connections for leaks. Check engine speed.

Multi Pro 5800−DPage 3 − 20Kubota Diesel Engine

This page is intentionally blank.

Engine

Kubota Diesel

Multi Pro 5800−D Page 3 − 21 Kubota Diesel Engine

Flywheel Coupler

16

11

RIGHT

FRONT

24356

1

12

13

14
15

78 9

6

1011

Figure 14

1. Coupling

2. Flywheel housing

3. Lock washer (2)

4. Cap screw (2)

5. Plastic plug (2)

6. Cap screw (6)

7. Cap screw (2)

8. Lock washer (8)

9. Cap screw (8)

10. Rear mount bracket (2)

11. Lock washer (9)

Coupler Removal (Fig. 14)
NOTE: The hydraulic pump assembly needs to be re-

moved from engine before coupler can be removed.

1. If engine is in machine, support rear of engine from
below to prevent it from shifting.

A. Remove hydraulic pump assembly (see Piston
(Traction) Pump i n C h a p t e r 5 − H y d r a u l i c S ystem in
this manual).

B. Remove flange nuts, snubbing washers and cap
screws securing the rear engine mount brackets to
engine mounts.

2. Remove flywheel housing and spring coupler from
the engine.

12. Cap screw (6)

13. Lock washer (6)

14. Snubbing washer (2)

15. Flange nut (2)

16. Cap screw (3)

Coupler Installation (Fig. 14)

1. Position spring coupler to engine flywheel and align
mounting holes. Make sure that coupler hub is away
from engine flywheel (Fig. 15).

2. Secure coupler to flywheel with six (6) cap screws
and lock washers. Tighten cap screws in a crossing pat­tern.

3. If rear mount brackets were removed from flywheel
housing, secure brackets to housing with removed fas­teners.

4. Position flywheel housing to engine. Secure flywheel
housing with cap screws and lock washers. Tighten cap
screws in a crossing pattern.

3. If necessary, remove rear mount brackets from fly­wheel housing.

Multi Pro 5800−DPage 3 − 22Kubota Diesel Engine

5. If engine is in machine:
A. Secure rear engine mount brackets to engine

mounts with flange nuts, snubbing washers and cap
screws.

B. Install hydraulic pump assembly (see Piston
(Traction) Pump Installation in Chapter 5 − Hydraulic
System in this manual).

Engine Side

1. Spring coupler

2. Engine flywheel

1

Hydraulic

Pump Side

3

Engine

Kubota Diesel

2

Figure 15

3. Coupler hub

Multi Pro 5800−D Page 3 − 23 Kubota Diesel Engine

This page is intentionally blank.

Multi Pro 5800−DPage 3 − 24Kubota Diesel Engine

Table of Contents

SPECIFICATIONS 2............................

GENERAL INFORMATION 3.....................

Operator’s Manual 3..........................

Kubota Workshop and Troubleshooting Manuals 3.

Kubota Gasoline Engine 3.....................

Kubota Gasoline Engine Electronic Control

Module (ECM) 4.............................

SERVICE AND REPAIRS 6......................

Fuel System 6................................

Air Cleaner 10................................

Exhaust System 12...........................

Radiator 14..................................

Engine 18....................................

Engine Removal 18..........................

Engine Installation 21........................

Flywheel Coupler 22...........................

Chapter 4

Kubota Gasoline Engine

Engine

Kubota Gasoline

KUBOTA WORKSHOP MANUAL,

GASOLINE ENGINE WG1605−G−E3

KUBOTA DIAGNOSIS MANUAL − ECM SYSTEM,

GASOLINE ENGINE WG1605−G−E3

Multi Pro 5800−G Page 4 − 1 Kubota Gasoline Engine

Specifications

Item Description

Make / Designation WG1605−G−E3, Kubota, 4−Cycle, 4 Cylinder,

Bore x Stroke 3.11 in x 3.09 in (79 mm x 78.4 mm)

Total Displacement 93.8 in3 (1537 cc)

Compression Ratio 9.1:1

Ignition Timing 26 degrees BTDC @ 3000 rpm

Ignition System Full Transistor Battery Ignition T ype

Firing Order 1 − 3 − 4 − 2 (numbers start at fan end)

Low Idle (no load) 1000 RPM

High Idle (no load) 3200 RPM

Direction of Rotation Counterclockwise (Viewed from Flywheel)

Spark Plug Type/Gap NGK IFR6F8DN 0.028 to 0.031 in. (0.7 to 0.8 mm)

Fuel Unleaded Gasoline (up to 10% ethanol),

octane rating of 87 or higher ((R+M)/2 rating method)

Water Cooled, Gasoline Engine

Fuel Tank Capacity 12 U.S. gallons (45 liters)

Governor Electronic

Engine Oil API Classification SL or Higher

Oil Pump Trochoid Type

Engine Oil Capacity (approximate) 5.4 U.S. quarts (5.1 liters) with Filter

Cooling System Capacity (approximate − including reserve tank) 5.8 U.S. quarts (5.5 liters)

Starter 12 VDC, 1.0 KW

Alternator/Regulator 12 VDC 60A

Engine Dry Weight (approximate) 262 lbs (119 kg)

(see Operator’s Manual for viscosity recommendations)

Multi Pro 5800−GPage 4 − 2Kubota Gasoline Engine

General Information

This Chapter gives information about specifications, ad­justments and repair of the Kubota Gasoline engine that
powers the Multi Pro 5800−G.

Operator ’s Manual

The Operator’s Manual provides information regarding
the operation, general maintenance and maintenance
intervals for the Kubota gasoline engine that powers
your Multi Pro 5800−G. Refer to that publication for
additional information when servicing the machine.

Kubota Workshop and Troubleshooting Manuals

General maintenance procedures are described in your
Operator’s Manual. Information on engine testing, dis­assembly and reassembly is identified in the Kubota
Workshop Manual (WG1605 Series) that is included at
the end of this chapter. Information on engine trou­bleshooting and testing is identified in the Kubota Diag­nosis Manual (WG1605 Series) that is included at the
end of this chapter.

Kubota Gasoline Engine

The engine used in your Multi Pro 5800−G is a Kubota
WG1605 Series gasoline engine. Engine features in­clude an electronic control module (ECM) that controls
a common rail fuel injection system with direct injection,
electronic throttle valve (ETV), an electronic governor
and a catalytic muffler exhaust system with oxygen sen­sors. The ECM receives information from numerous en­gine sensors. The information provided allows the
engine ECM to monitor and control engine operation for
optimum engine performance.

Most engine repairs and adjustments require tools
which are commonly available in many service shops.
Special tools are described in the Kubota Workshop
Manual EG1605 Series). The use of some specialized
test equipment is explained. However, the cost of the
test equipment and the specialized nature of some re­pairs may dictate that the work be done at an engine re­pair facility.

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 3 Kubota Gasoline Engine

Figure 1

Kubota Gasoline Engine Electronic Control Module (ECM)

The Kubota gasoline engine that powers your Multi Pro
5800−G uses an electronic control unit (ECM) for engine
management. All wire harness electrical connectors
should be plugged into the ECM before the machine
ignition switch is moved from the OFF position to either
the ON or START position.

1

The engine electrical components (e.g. ECM, O2
sensor, throttle control, power relay, ETV relay) are
identified and matched in the engine ECM program. If
engine electrical components are replaced on the en­gine, the Kubota electronic tool must be used to update
the ECM program which will ensure correct engine oper­ation.

If the engine ECM identifies that an engine problem ex­ists, an engine fault may appear on the InfoCenter Dis­play. In addition, the engine speed may be reduced or
the engine might stop. The Kubota Gasoline Service
Tool (KGST) and software, and the Kubota Diagnosis
Manual − ECM System should be used to provide as­sistance in identifying the cause of the problem and any
repairs that are necessary . Contact your Toro distributor
for assistance in Kubota engine troubleshooting.

IMPORTANT: Do not plug or unplug the engine
ECM for a period of thirty (30) seconds after the ma­chine key switch is turned OFF. The ECM may re­main energized even though the ignition switch is
OFF.

If the engine ECM is to be disconnected for any reason,
make sure that the ignition switch is in the OFF position
with the key removed before disconnecting the engine
ECM. Also, to prevent possible ECM damage when
welding on the machine, disconnect and remove the en­gine ECM from the machine before welding.

2

Figure 2

1. Gasoline engine

2. Engine ECM

Multi Pro 5800−GPage 4 − 4Kubota Gasoline Engine

This page is intentionally blank.

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 5 Kubota Gasoline Engine

Service and Repairs

Fuel System

13
14
15

10 to 12 in−lb

(1 N−m)

13 to 65 in−lb

(1 to 7 N−m)

RIGHT

FRONT

10

12

11

16

17

TO

FUEL

RAIL

18

17

9
6

5

8

7

6

4

1

2

25 in−lb (3 N−m)

1. Fuel tank

2. Base

3. Flange nut (2)

4. Carriage bolt (2)

5. Rubber bumper (2)

6. Flat washer (6)

3

Figure 3

7. Flange nut (2)

8. Clamp (2)

9. Cap screw (2)

10. Fuel fill cap

11. Gasket

12. Fuel pump/level sender

13. Flange head screw (4)

14. Tank cover

15. Fuel pump/level sender cap

16. Barb fitting (2)

17. Hose clamp (2)

18. Fuel hose − supply

Multi Pro 5800−GPage 4 − 6Kubota Gasoline Engine

DANGER

4

3

UNLOCKED

Because gasoline is highly flammable, use cau­tion when storing or handling it. Do not smoke
while filling the fuel tank. Do not fill fuel tank
while engine is running, hot or when machine is
in an enclosed area. Always fill fuel tank outside
and wipe up any spilled fuel before starting the
engine. Store fuel in a clean, safety−approved
container and keep cap in place. Use diesel fuel
for the engine only; not for any other purpose.

Check Fuel Lines and Connections

Check fuel lines and connections periodically as recom­mended in the Operator’s Manual. Check lines for dete­rioration, damage, leaks or loose connections. Replace
hoses, clamps and connections as necessary.

Empty and Clean Fuel Tank

Empty and clean the fuel tank if the fuel system be­comes contaminated or if the machine is to be stored for
an extended period.

To clean fuel tank, flush tank out with clean solvent.
Make sure tank is free of contaminates and debris.

1

4

2

LOCKED

1

Engine

Kubota Gasoline

Fuel Tank Removal (Fig. 3)

1. Park machine on a level surface, stop engine, en-

gage parking brake and remove key from the ignition
switch.

2. Use a fuel transfer pump to remove fuel from the fuel

tank and into a suitable container.

3. Remove the fuel tank cover.

4. Disconnect the fuel pump/level sender form the ma-

chine wire harness (2 connectors).

CAUTION

Fuel in supply line may be under pressure. Cov­er supply hose barb fitting with rag while discon­necting to absorb any fuel leakage.

5. Disconnect the fuel supply hose from the fuel pump/

level sender.

A. Lift supply hose barb fitting lock up to unlock
fitting (Fig. 4).

B. Press barb fitting tab and pull fitting from fuel
pump/level sender.

Figure 4

1. Fuel pump/level sender
fitting

2. Barb fitting lock
(locked − down)

3. Barb fitting lock
(unlocked − up)

4. Barb fitting tab

6. Remove two (2) fuel tank clamps from base and re­move fuel tank from machine. Check condition of fuel
tank rubber bumpers and replace if worn or damaged.

7. If necessary, remove fuel pump/level sender from
tank. Check condition of gasket and replace if worn or
damaged. See Fuel Pump/Level Sender in Chapter − 6
Electrical System for testing information. Check and re­place fuel filter at fuel pump/level sender pickup as nec­essary (see machine Operator’s Manual).

8. If necessary, remove fuel hose from machine.
Record fuel hose routing for assembly purposes.

Fuel Tank Installation (Fig. 3)

1. If fuel hose were removed from machine, route fuel
hose through machine as recorded during removal.
Make sure that clearance exists between fuel hose and
machine components along full length of hoses.

2. Secure fuel tank to machine with two (2) clamps at
base. Tighten clamp fasteners to 25 in−lbs (3 N−m).

Multi Pro 5800−G Page 4 − 7 Kubota Gasoline Engine

3. Install fuel pump/level sender if previously removed
from tank. Tighten fuel pump/level sender cap from 13
to 65 in−lbs (1 to 7 N−m).

4. Connect fuel hose to top of fuel tank.

5. Connect machine wire harness to fuel pump/level
sender (2 connectors)

6. Install fuel tank cover and tighten cover screws from
10 to 12 in−lbs (1 N−m).

A. Push supply hose barb fitting onto fuel pump/lev­el sender until an audible “Click” is heard.

B. Press barb fitting lock down to lock fitting in place
(Fig. 4).

7. Fill fuel tank. Start engine and check fuel line con­nections for leaks.

Multi Pro 5800−GPage 4 − 8Kubota Gasoline Engine

This page is intentionally blank.

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 9 Kubota Gasoline Engine

Air Cleaner

1

2

5

6

3

4

7

15

14

9

13

16

8

17

18

9

RIGHT

FRONT

1. Cap

2. Hose clamp

3. Flange head screw

4. Clamp

5. Flange nut (2)

6. Bracket

7. Flange nut

9

19

10

11

12

9

Figure 5

8. Hose

9. Hose clamp (5)

10. Flange head screw (2)

11. Air cleaner mount

12. Flange nut (2)

13. Hose

17

14. Air cleaner assembly

15. U−Bolt

16. Breather hose

17. Hose clamp (2)

18. Tee

19. Hose

Multi Pro 5800−GPage 4 − 10Kubota Gasoline Engine

Removal (Fig. 5)
NOTE: For air cleaner maintenance information, see

the machine Operator’s Manual.

1. Raise passenger seat to access air cleaner assem­bly.

2. Remove air cleaner components as needed.

Installation (Fig. 5)
IMPORTANT: Any leaks in the air filter system will

cause serious engine damage. Make sure that all air
cleaner components are in good condition and are
properly secured during installation.

2

1

4

3

1. Assemble air cleaner system. Make sure that vacua­tor valve on air cleaner cover points downward after as­sembly (Fig. 6).

1. Air cleaner housing

2. Air cleaner element

Figure 6

3. Air cleaner cover

4. Vacuator valve

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 11 Kubota Gasoline Engine

Exhaust System

RIGHT

FRONT

18

19

17

16

20

16

17

8

9

6

7

10

APPLY ANTI SIEZE

LUBRICANT

16
15

34

32

1

32

33

APPLY

LOCTITE 242

5

4

3

2

7

26

13

29 to 44 ft−lb

(40 to 60 N−m)

29

31

6

28

7

14

13

25

24

11

12

21

22

23

24

3

3

27

26

5

7

3

30

1. Gasket

2. Header pipe

3. Flange head screw (16)

4. Shield − composite

5. Muffler shield − outer (2)

6. Cap screw (4)

7. Lock washer (4)

8. Flange head screw (2)

9. Flat washer (2)

10. Bracket − catalyst

11. Cap screw (2)

12. Gasket

Figure 7

13. Oxygen sensor (2)

14. Tail pipe

15. Hanger

16. Flange nut (2)

17. Flat washer (2)

18. Flange nut

19. Rubber hanger

20. Cap screw

21. Flange nut (2)

22. Lock washer (2)

23. Flat washer (2)

24. Muffler shield − inner (2)

25. Catalytic muffler

26. Flange nut (8)

27. Gasket

28. Cap screw (4)

29. Hose clamp

30. Jacket lower

31. Jacket upper

32. Flange head screw (2)

33. Flange head screw

34. Manifold shield − bottom

Multi Pro 5800−GPage 4 − 12Kubota Gasoline Engine

Installation (Fig. 7)

CAUTION

The muffler and exhaust system may be hot. To
avoid possible burns, allow the engine and ex­haust system to cool before working on the ex­haust system.

Removal (Fig. 7)

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Remove the rear undercarriage shroud from the ma­chine (see Undercarriage Shrouds in Chapter 9 − Chas­sis in this manual).

3. Disconnect rear oxygen sensor from machine wire
harness and remove tail pipe.

4. Remove catalytic muffler outer and inner heat
shields.

5. Disconnect catalytic muffler from header pipe and
machine frame and remove muffler.

6. Disconnect front oxygen sensor from machine wire
harness and remove header pipe.

7. Locate and discard exhaust system gaskets. Clean
gasket surfaces on engine exhaust manifold, catalytic
muffler and tail pipe.

8. Replace damaged or worn header pipe jackets or
shield if necessary.

NOTE: New oxygen sensor threads come pre−coated
with an anti seize compound. If a previously installed
oxygen sensor is used, apply a small amount of anti−
seize to the threads.

1. If installing an oxygen sensor, do not allow the tip of
the sensor to touch anything as it may become contami­nated. Tighten from 29 to 44 ft−lb (40 to 60 N−m).

2. If header pipe was removed from engine, use a new
gasket and install header pipe and fasteners finger tight.

3. If catalyst muffler was removed, use a new gasket
and install muffler and fasteners finger tight.

4. If tail pipe was removed from engine, use a new gas­ket and install pipe pipe, hanger and fasteners finger
tight.

5. Tighten exhaust system components i n the following
order:

A. Tighten fasteners securing header pipe to ex­haust header.

B. Tighten fasteners securing catalyst muffler to
header pipe and to machine frame.

C. Tighten fasteners securing tailpipe to catalyst
muffler.

D. Position the tailpipe so the outlet is parallel to the
ground and tighten exhaust system hanger and
bracket fasteners..

6. Install catalytic muffler inner and outer heat shields.

Engine

Kubota Gasoline

7. Install the rear undercarriage shroud to the machine
(see Undercarriage Shrouds in Chapter 9 − Chassis in
this manual).

Multi Pro 5800−G Page 4 − 13 Kubota Gasoline Engine

Radiator

3

1

5
6

1. Console assembly

2. Seat belt bracket assembly (2)

Figure 8

3. Carriage screw (12)

4. Flange nut (16)

2

3

5

4

4

5. Flange head screw (4)

6. Radiator

2

4

Removal

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Remove the seats and hinged seat panels from the
seat box (see Seats in Chapter 9 − Chassis in this manu­al).

3. Remove the undercarriage shrouds from the ma­chine (see Undercarriage Shrouds in Chapter 9 − Chas­sis in this manual).

CAUTION

Do not open radiator cap or drain coolant if the
radiator or engine is hot. Pressurized, hot cool­ant can escape and cause burns. Ethylene−gly­col antifreeze is poisonous. Dispose of coolant
properly or store it in a properly labeled contain­er away from children and pets.

4. Drain coolant from radiator (see machine Operator’s
Manual). The coolant drain valve is located under the
passenger seat, in the lower right corner of the radiator .

5. Loosen hose clamps that secure the upper and lower
radiator hoses to the radiator and disconnect the hoses
from the radiator.

6. Loosen hos e clamp that secures overflow hose to ra­diator cap flange. Remove overflow hose from radiator.

7. Remove carriage screws and flange nuts that secure
seat belt bracket assemblies to seat box and remove
both bracket assemblies from machine (Fig.8).

8. Remove fasteners that secure console assembly to
seat box (Fig. 8). Carefully pivot console assembly rear­ward and to the right to allow radiator access. Take care
to not damage the wire harness or throttle cable. Sup­port console to prevent it from shifting, falling, or hang­ing from wire harness or throttle cable.

Multi Pro 5800−GPage 4 − 14Kubota Gasoline Engine

28

27

29

30

31

32

31

33

23
24

25
26

13

12

2

3

1

10

4

9

11

14
11

5

15

RIGHT

FRONT

1. Radiator

2. Foam seal (4)

3. Foam seal

4. Foam seal (2)

5. Foam seal

6. Hose clamp (4)

7. Upper radiator hose

8. Lower radiator hose

9. Lower fan shroud

10. Upper fan shroud

11. Flat washer (8)

22

21

20

12. Lock washer (4)

13. Cap screw (4)

14. Cap screw (2)

15. Flange nut (2)

16. Iso−mount (2)

17. Pop rivet (4)

18. Heat baffle − RH

19. Heat baffle − LH

20. Flange nut (2)

21. Fan shroud and oil cooler

22. Cap screw (4)

Figure 9

16
17

18

7

6

4

8

6

17

19

23. Cap screw (2)

24. Lock washer (6)

25. Flat washer (6)

26. Bracket (2)

27. Flange nut (2)

28. Cap screw (2)

29. Overflow bottle bracket

30. Hose (vent)

31. Hose clamp (3)

32. Overflow bottle

33. Hose (radiator)

Engine

Kubota Gasoline

9. Remove four (4) cap screws (Fig. 9 item 13), lock
washers and flat washers that secure fan shroud as­sembly to radiator.

10.Remove two (2) cap screws (Fig. 9 item 14), flat
washers and flange nuts to separate the fan shroud
halves and carefully remove the upper fan shroud from
the machine.

Multi Pro 5800−G Page 4 − 15 Kubota Gasoline Engine

11.Remove six (6) cap screws (Fig. 9 items 22 and 23),
lock washers and flat washers that secure front radiator
shroud and oil cooler (Fig. 7 item 21) to radiator.

12.Remove two (2) flange nuts (Fig. 9 item 20) that se­cure the iso−mounts on the bottom of the radiator to the
machine frame.

13.Carefully lift radiator up and out of the machine.

14.Inspect radiator hoses and rubber iso−mounts. Re­place worn or damaged components as necessary.

15.,Inspect foam radiator shroud seals and foam radia­tor seals in machine frame. Replace any foam seals that
are damaged or deteriorated.

Installation

6. Connect lower and upper radiator hoses to the radia­tor. Secure hoses with hose clamps.

7. Carefully pivot console assembly back in position
taking care to not damage wire harness or throttle cable.
Install fasteners to secure console assembly to seat box
assembly (Fig. 8).

8. Secure both seat belt bracket assemblies to seat bo x
with carriage screws and flange nuts (Fig. 8).

1. Position lower fan shroud below fan.

2. Carefully lower radiator into the machine. Secure
iso−mounts on the bottom of the radiator to the machine
frame with two (2) flange nuts.

3. Secure radiator to front radiator shroud and oil cooler
(Fig. 9 item 21) with six (6) cap screws (Fig. 9 items 22
and 23), lock washers and flat washers.

4. Secure upper fan shroud to lower fan shroud with
cap screws (Fig. 9 item 14), flat washers and flange
nuts.

5. Secure fan shroud assembly to radiator with four (4)
cap screws (Fig. 9 item13), lock washers and flat wash­ers. Make sure that clearance exists between fan
shrouds and fan at all points before tightening fasteners.

9. Fit overflow hose to radiator flange and secure with
hose clamp. Make sure overflow hose is not kinked.

10.Fill radiator with coolant (see machine Operator ’s
Manual)

11. Check position of electrical wires, hydraulic hoses
and control cables for proper clearance with rotating,
high temperature and moving components.

12.Start engine and check for proper operation. Check
all coolant hose connections for leaks.

13.Install the undercarriage shrouds to the machine
(see Undercarriage Shrouds in Chapter 9 − Chassis in
this manual).

14.Install the seats and hinged seat panels to the seat
box (see Seats in Chapter 9 − Chassis in this manual).

Multi Pro 5800−GPage 4 − 16Kubota Gasoline Engine

This page is intentionally blank.

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 17 Kubota Gasoline Engine

Engine

1

11

12

13

1

2

2

5
8
7

12

11

4

3

5
6

7

RIGHT

FRONT

1. Engine assembly

2. Cap screw (4)

3. Lock washer (8)

4. Cap screw (8)

5. Cap screw (8)

6. Rear engine mount bracket (2)

7. Engine mount (4)

8. Front left engine mount

9. Snubbing washer (4)

The following engine removal and installation proce­dures describe lifting and lowering the engine out from
above the machine.

Removal

1. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch.

2. Disconnect negative (−) and then positive (+) battery
cables from the battery.

9

9

10

10

Figure 10

10. Flange nut (12)

11. Cap screw (8)

12. Lock washer (8)

13. Front right engine mount

3. Remove battery and battery tray from machine.

4. Remove the front fenders.

5. Remove the radiator (see Radiator in this chapter).

6. Detach the air cleaner hose from the R.O.P.S. bar
(see Air Cleaner in this chapter).

7. Loosen the hose clamp at the intake manifold of the
engine and disconnect the air cleaner hose from the en­gine manifold (see Air Cleaner in this chapter).

Multi Pro 5800−GPage 4 − 18Kubota Gasoline Engine

3

6

5

7

3

8

4

3

2

1

1. Access panel

2. Seat base − front

3. Washer head screw (20)

4. Flange nut (20)

9

4

10

4

3

Figure 11

5. Seat base − RH

6. Support strap (2)

7. Cross member

8. Engine shroud

12

3

6

4

3

11

Engine

Kubota Gasoline

9. Cross member support − RH

10. Cross member support − LH

11. Seat base − LH

12. Fuse block

8. Disconnect the breather hose from the engine valve
cover.

15.Remove seat base panels (left side, right side and
front), rear cross member and cross member supports
from machine (Fig. 11).

9. Remove exhaust system from engine (see Exhaust
System Removal in this chapter).

10.Depending on the type of engine hoist you use, you

CAUTION

may wish to remove the R.O.P .S. bar from the machine.

Hydraulic pump assembly weighs approximate-

11. Remove spray tank (see Spray Tank in the Spray
System chapters in this manual).

12.Remove engine shroud from back of seat base

ly 72 pounds (33 kg). Make sure that pump as­sembly is well supported (from above or below)
during engine removal.

(Fig. 11).

16.Detach hydraulic pump assembly from engine (see

13.Label the wire harness connectors at the relays and
ground terminal block attached to the left side seat base

Piston (Traction) Pump in Chapter 4 − Hydraulic System
in this manual).

panel.

NOTE: Separate the Yanmar engine wire harness from

14.Remove the fuse block from the mounting bracket on
the left side seat base panel.

the machine wire harness and remove the engine with
the Y anmar engine wire harness connected to the indi­vidual engine electrical components.

Multi Pro 5800−G Page 4 − 19 Kubota Gasoline Engine

17.Label and disconnect wire harness connectors at the
following locations:

A. Remove positive battery cable and wire harness
connector from starter motor (Fig. 12).

B. Remove cap screw and lock washer that secure
negative battery cable and wire harness ground wire
to engine block (Fig. 12).

3

1

C. Disconnect the 16 pin interconnect between the
Yanmar engine wire harness and the machine wire
harness. The interconnect is located on the right side
of engine near the engine power center (Fig. 13).

18.Clamp fuel supply hose near the engine fuel rail to
prevent leakage (see Fuel System in this chapter). Dis­connect fuel supply hose from the fuel rail and position
disconnected fuel hose away from engine.

19.Record location of any cable ties used to secure the
wiring harness, fuel line or hydraulic hoses to the engine
assembly. Remove cable ties attached to engine as­sembly.

20.Remove flange nuts, snubbing washers and cap
screws securing the engine brackets to engine mounts.

CAUTION

Make sure that hoist or lift used to remove en­gine can properly support engine. Engine as­sembly weighs approximately 295 pounds
(134 kg).

1. Starter motor stud

2. Negative battery cable

2

Figure 12

3. Harness ground wire

1

2

IMPORTANT: Make sure to not damage the engine,
fuel hoses, hydraulic lines, electrical harness or
other parts while removing the engine assembly.

21.Using a hoist and the lifting lugs provided on the en­gine, carefully lift the engine from the machine.

22.If necessary, remove engine brackets, pump
adapter and flywheel coupler from the engine, or engine
mounts from frame.

Figure 13

1. Engine power center 2. 16 pin interconnect

Multi Pro 5800−GPage 4 − 20Kubota Gasoline Engine

Installation

1. Park machine on a level surface and engage parking
brake.

2. Make sure that all parts removed from the engine
during maintenance or rebuilding (including engine
mount brackets, pump adapter and flywheel coupler)
are reinstalled to the engine assembly.

IMPORTANT: Make sure to not damage the engine,
fuel hoses, hydraulic lines, electrical harness or
other parts while installing the engine assembly.

9. Using labels placed during engine removal, attach
wire harness connections at glow plug controller (front
seat base panel) and relays (left side seat base panel.

10.Install engine shroud to back of seat base (Fig. 11).

11.Install spray tank (see Spray Tank in the Spray S ys ­tem chapters in this manual).

12.If previously removed, install the R.O.P.S. bar to the
machine.

13.Install exhaust system (see Exhaust System Instal­lation in this chapter).

CAUTION

Make sure that hoist or lift used to remove en­gine can properly support engine. Engine as­sembly weighs approximately 295 pounds
(134 kg).

3. Using a hoist and the lifting lugs provided on the en­gine, carefully lift the engine into the machine. Insert cap
screws through engine brackets and motor mounts from
above. Install snubbing washers and flange nuts on cap
screws and tighten (Fig. 10).

4. Connect fuel supply hose to the engine fuel rail. Re­move clamp from fuel hose that was used to prevent
leakage during engine removal.

5. Using labels placed during engine removal, attach all
engine electrical connections (see step 17. in removal
procedure).

6. Install hydraulic pump assembly to engine (see Pis­ton (Traction) Pump Installation in Chapter 4 − Hydraulic
System in this manual).

7. Install seat base panels (left side, right side and
front), rear cross member and cross member supports
to machine (Fig. 11).

8. Install fuse block to left side seat base panel.

IMPORTANT: Any leaks in the air intake system will
cause serious engine damage. Make sure that all air
cleaner components are in good condition and are
properly secured during assembly.

14.Install air cleaner hoses to engine manifold and
R.O.P.S. bar (see Air Cleaner in this chapter). Make
sure that hose clamps are properly tightened.

15.Install the radiator (see Radiator in this chapter).

16.Install cable ties to secure the wiring harness, fuel
lines and hydraulic hoses to the engine assembly using
notes taken during engine removal.

17.Install the front fenders.

18.Install battery and battery tray to machine.

19.Properly fill the radiator with coolant (see machine
Operator’s Manual).

20.Check engine oil level and adjust if necessary.

21.Connect positive (+) and then negative (−) battery
cables to the battery.

22.Check position of wires, fuel lines, hydraulic hoses
and cables for proper clearance with rotating, high tem­perature and moving components.

23.Start engine and check for proper operation. Check
all hose connections for leaks. Check engine speed.

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 21 Kubota Gasoline Engine

Flywheel Coupler

RIGHT

FRONT

11

16

1. Coupling

2. Flywheel housing

3. Lock washer (2)

4. Cap screw (2)

5. Plastic plug (2)

6. Cap screw (6)

1

Figure 14

7. Cap screw (2)

8. Lock washer (8)

9. Cap screw (8)

10. Rear mount bracket (2)

11. Lock washer (9)

24356

12

13

14
15

12. Cap screw (6)

13. Lock washer (6)

14. Snubbing washer (2)

15. Flange nut (2)

16. Cap screw (3)

78 9

6

1011

Coupler Removal (Fig. 14)
NOTE: The hydraulic pump assembly needs to be re-

moved from engine before coupler can be removed.

1. If engine is in machine, support rear of engine from
below to prevent it from shifting.

A. Remove hydraulic pump assembly (see Piston
(Traction) Pump i n C h a p t e r 5 − H y d r a u l i c S ystem in
this manual).

B. Remove flange nuts, snubbing washers and cap
screws securing the rear engine mount brackets to
engine mounts.

2. Remove flywheel housing and spring coupler from
the engine.

3. If necessary, remove rear mount brackets from fly­wheel housing.

Coupler Installation (Fig. 14)

1. Position spring coupler to engine flywheel and align
mounting holes. Make sure that coupler hub is away
from engine flywheel (Fig. 15).

2. Secure coupler to flywheel with six (6) cap screws
and lock washers. Tighten cap screws in a crossing pat­tern.

3. If rear mount brackets were removed from flywheel
housing, secure brackets to housing with removed fas­teners.

4. Position flywheel housing to engine. Secure flywheel
housing with cap screws and lock washers. Tighten cap
screws in a crossing pattern.

Multi Pro 5800−GPage 4 − 22Kubota Gasoline Engine

5. If engine is in machine:
A. Secure rear engine mount brackets to engine

mounts with flange nuts, snubbing washers and cap
screws.

B. Install hydraulic pump assembly (see Piston
(Traction) Pump Installation in Chapter X − Hydraulic
System in this manual).

Engine Side

1. Spring coupler

2. Engine flywheel

Figure 15

3. Coupler hub

1

Hydraulic

Pump Side

3

2

Engine

Kubota Gasoline

Multi Pro 5800−G Page 4 − 23 Kubota Gasoline Engine

This page is intentionally blank.

Multi Pro 5800−GPage 4 − 24Kubota Gasoline Engine

Table of Contents

Chapter 5

Hydraulic System

SPECIFICATIONS 3............................

GENERAL INFORMATION 4.....................

Operator’s Manual 4..........................

Traction Circuit Component Failure 4............

Hydraulic Hoses 5............................

Hydraulic Hose and Tube Installation 6..........

Hydraulic Fitting Installation 7..................

HYDRAULIC SCHEMATIC 9.....................

HYDRAULIC FLOW CIRCUITS 10................

Traction Circuit 10............................

Steering Circuit 12............................

Spray Pump Drive Circuit 14...................

Spray Boom Lift Circuit 16.....................

SPECIAL TOOLS 18............................

TROUBLESHOOTING 22........................

TESTING 26...................................

Traction Circuit

Charge Pressure Test 28....................

Charge Pump Flow Test 30..................

Wheel Motor Efficiency Test 32...............

Traction (Piston) Pump Flow and

Relief Pressure Test 36....................

Steering/Boom Lift Circuit

Gear Pump P2 Flow and Circuit Relief

Pressure Test (Using Tester with Flow

Meter and Pressure Gauge) 40.............

Steering Control Valve and Steering

Cylinder Test 44..........................

Boom Lift Cylinder Internal Leakage Test 46....

Spray Pump Circuit

Gear Pump P1 Flow Test (Using Tester with

Flow Meter and Pressure Gauge) 48........

ADJUSTMENTS 50.............................

Adjust Traction Pedal for Neutral 50.............

SERVICE AND REPAIRS 51.....................

General Precautions for Removing and

Installing Hydraulic System Components 51......

Check Hydraulic Lines and Hoses 51............

Priming Hydraulic Pumps 52...................

Flush Hydraulic System 53.....................

Filtering Closed- Loop Traction Circuit 54........

Charging Hydraulic System 55..................

Gear Pump 56................................

Gear Pump Service 58........................

Piston (Traction) Pump 62.....................

Piston (Traction) Pump Service 66..............

Wheel Motors 68.............................

Wheel Motor Service 70.......................

Spray Pump Drive Motor and Control

Manifold Assembly 72........................

Spray Pump Drive Motor Service 74.............

Spray Pump Control Manifold Service 76........

Steering Control Valve 78......................

Steering Control Valve Service 80...............

Steering Cylinder 82..........................

Steering Cylinder Service 84......

Boom Lift Manifold 86.........................

Boom Lift Manifold Service 88..................

Boom Lift Cylinders 90........................

Boom Lift Cylinder Service 92..................

Oil Cooler 94.................................

Hydraulic Reservoir 96........................

EATON MODEL 72400 SERVO CONTROLLED

PISTON PUMP REPAIR INFORMATION

EATON MODEL 74318 and 74348 PISTON MOTORS:

FIXED DISPLACEMENT, VALVE PLATE DESIGN
REPAIR INFORMATION

TM

PARKER TORQLINK

SAUER/DANFOSS STEERING UNIT TYPE OSPM

SERVICE MANUAL

SERVICE PROCEDURE

.............

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 - 1

This page is intentionally blank.

Multi Pro 5800Hydraulic System Page 5 − 2

Specifications

Item Description

Piston (Traction) Pump Variable displacement piston pump (Eaton model 72400)

Maximum Displacement (per revolution) 2.48 in
System Relief Pressure: Forward 4000 PSI (276 bar)
System Relief Pressure: Reverse 4000 PSI (276 bar)

Charge Pump Positive displacement gear type pump

(integral in piston (traction) pump)
Displacement (per revolution) 0.42 in
Charge Pressure 250 to 300 PSI (17 to 21 bar)

Gear Pump 2 section, positive displacement gear type pump

Front section (spray pump drive) displacement (per revolution) 0.95 in
Rear section (steering/boom lift) displacement (per revolution) 0.34 in

Rear Wheel Motors Fixed displacement piston motor (Eaton model 74318)

Displacement (per revolution) 2.48 in

Spray Pump Motor Orbital rotor motor (Parker series TE)

Displacement (per revolution) 6.0 in

Spray Pump Circuit Relief Pressure 2000 PSI (138 bar)

Steering Control Valve Rotary valve steering unit with power beyond

(Sauer Danfoss series OSPM)

Displacement (per revolution) 4.3 in

Steering/Boom Lift Circuit Relief Pressure 1015 PSI (69 bar)

3

(40.6 cc)

3

(6.9 cc)

3

(15.6 cc)

3

(5.6 cc)

3

(40.6 cc)

3

(100 cc)

3

(70 cc)

System

Hydraulic

Hydraulic Filter Spin−on cartridge type

In−line Suction Strainer 100 mesh (in reservoir)

Hydraulic Reservoir Capacity 14 U.S. gal (53 l)

Hydraulic Oil See Operator’s Manual

Multi Pro 5800 Hydraulic SystemPage 5 − 3

General Information

Operator’s Manual

The Operator’s Manual provides information regarding
the operation, general maintenance and maintenance
intervals for your Multi Pro machine. Refer to that publi­cation for additional information when servicing the ma­chine.

Traction Circuit Component Failure

The traction circuit on Multi Pro 5800 machines is a
closed loop system that includes the piston (traction)
pump and two (2) rear wheel motors. If a component in
the traction circuit should fail, debris and contamination
from the failed component will circulate throughout the
traction circuit. This contamination can damage other
components in the circuit so it must be removed to pre­vent additional component failure.

The recommended method of removing traction circuit
contamination would be to temporarily install the Toro
high flow hydraulic filter (see Special Tools in this chap­ter) into the circuit. This filter should be used when con­necting hydraulic test gauges in order to test traction
circuit components or after replacing a failed traction cir­cuit component (e.g. traction (piston) pump or wheel
motor). The filter will ensure that contaminates are re­moved from the closed loop and thus, do not cause addi­tional component damage.

Once the Toro high flow hydraulic filter kit has been
placed in the circuit, raise and support the machine with

all wheels off the ground. Then, operate the traction cir­cuit to allow oil flow throughout the circuit. The filter will
remove contamination from the traction circuit during
operation. Because the Toro high flow filter is bi−direc­tional, the traction circuit can be operated in both the for­ward and reverse direction. The filter should be
removed from the machine after contamination has
been removed from the traction circuit. See Filtering
Closed−Loop T raction Circuit in the Service and Repairs
section of this chapter for additional information on us­ing the Toro high flow hydraulic filter.

The alternative to using the Toro high flow hydraulic filter
kit after a traction circuit component failure would be to
disassemble, drain and thoroughly clean all compo­nents, tubes and hoses in the traction circuit. If any de­bris remains in the traction circuit and the machine is
operated, the debris can cause additional circuit compo­nent failure.

Multi Pro 5800Hydraulic System Page 5 − 4

Hydraulic Hoses

r

r

-

­r

Hydraulic hoses are subject to extreme conditions such
as pressure differentials during operation and exposure
to weather, sun, chemicals, very warm storage condi­tions or mishandling during operation and maintenance.
These conditions can cause hose damage and deterio­ration. Some hoses are more susceptible to these
conditions than others. Inspect all machine hydraulic
hoses frequently for signs of deterioration or damage:

WARNING

Before disconnecting or performing any work on
hydraulic system, relieve all pressure in system
(see Relieving Hydraulic System Pressure in this
section).

Hard, cracked, cut, abraded, charred, leaking or
otherwise damaged hose.

Kinked, crushed, flattened or twisted hose.
Blistered, soft, degraded or loose hose cover.
Cracked, damaged or badly corroded hose fittings.

When replacing a hydraulic hose, be sure that the hose
is straight (not twisted) before tightening the fittings.
This can be done by observing the imprint (lay−line) on
the hose. Use two wrenches when tightening a hose;
hold the hose straight with one wrench and tighten the
hose swivel nut onto the fitting with the second wrench
(see Hydraulic Hose and Tube Installation in this sec­tion). If the hose has an elbow at one end, tighten the
swivel nut on that end before tightening the nut on the
straight end of the hose.

For additional hydraulic hose information, refer to Toro
Service Training Book, Hydraulic Hose Servicing (Part
Number 94813SL).

Keep body and hands away from pin hole leaks o
nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, not hands, to
search for leaks. Hydraulic fluid escaping unde
pressure can have sufficient force to penetrate
the skin and cause serious injury. If fluid is in
jected into the skin, it must be surgically re
moved within a few hours by a doctor familia
with this type of injury. Gangrene may result from
such an injury.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 5

Hydraulic Hose and Tube Installation (O−Ring Face Seal Fitting)

1. Make sure threads and sealing surfaces of the hose/
tube and the fitting are free of burrs, nicks, scratches or
any foreign material.

2. As a preventative measure against leakage, it is rec­ommended that the face seal O−ring be replaced any
time the connection is opened. Make sure the O−ring is
installed and properly seated in the fitting groove. Lightly
lubricate the O−ring with clean hydraulic oil.

3. Place the hose/tube against the fitting body so that
the flat face of the hose/tube sleeve fully contacts the O−
ring in the fitting.

4. Thread the swivel nut onto the fitting by hand. While
holding the hose/tube with a wrench, use a torque
wrench to tighten the swivel nut to the recommended
installation torque shown in Figure 3. This tightening
process will require the use of an offset wrench (e.g.
crowfoot wrench). Use of an offset wrench will affect
torque wrench calibration due to the effective length
change of the torque wrench. Tightening torque when
using a torque wrench with an offset wrench will be lower
than the listed installation torque (see Using a Torque
Wrench with an Offset Wrench in the Torque Specifica­tions section of Chapter 2 − Product Records and Main­tenance).

C. Use a second wrench to tighten the nut to the cor­rect Flats From Wrench Resistance (F.F.W.R.). The
markings on the nut and fitting body will verify that the
connection has been properly tightened.

Size F.F.W.R.

4 (1/4 in. nominal hose or tubing) 1/2 to 3/4
6 (3/8 in.) 1/2 to 3/4
8 (1/2 in.) 1/2 to 3/4
10 (5/8 in.) 1/2 to 3/4
12 (3/4 in.) 1/3 to 1/2
16 (1 in.) 1/3 to 1/2

Swivel Nut

Tube or Hose

O−ring

Fitting Body

Figure 1

5. If a torque wrench is not available or if space at the
swivel nut prevents use of a torque wrench, an alternate
method of assembly is the Flats From Wrench Resist­ance (F.F.W.R.) method (Fig. 2).

Mark Nut

and Fitting

Body

Final

Position

A. Using a wrench, tighten the swivel nut onto the fit­ting until light wrench resistance is reached (approxi-

Extend Line

mately 30 in−lb).
B. Mark the swivel nut and fitting body. Hold the

hose/tube with a wrench to prevent it from turning.

AT WRENCH RESISTANCE

Figure 2

Fitting Dash Size Hose/Tube Side Thread Size Installation Torque

4 9/16 − 18 18 to 22 ft−lb (25 to 29 N−m)
6 11/16 − 16 27 to 33 ft−lb (37 to 44 N−m)

8 13/16 − 16 37 to 47 ft−lb (51 to 63 N−m)
10 1 − 14 60 to 74 ft−lb (82 to 100 N−m)
12 1 3/16 − 12 85 to 105 ft−lb (116 to 142 N−m)

Initial
Position

AFTER TIGHTENING

16 1 7/16 − 12 110 to 136 ft−lb (150 to 184 N−m)
20 1 11/16 − 12 140 to 172 ft−lb (190 to 233 N−m)

Figure 3

Multi Pro 5800Hydraulic System Page 5 − 6

Hydraulic Fitting Installation (SAE Straight Thread O−Ring Fitting into Component Port)

Non−Adjustable Fitting (Fig. 4)

1. Make sure all threads and sealing surfaces of fitting
and component port are free of burrs, nicks, scratches
or any foreign material.

2. As a preventative measure against leakage, it is rec­ommended that the O−ring be replaced any time the
connection is opened.

3. Lightly lubricate the O−ring with clean hydraulic oil.
Fitting threads should be clean with no lubricant applied.

IMPORTANT: Before installing fitting into port, de­termine port material. If fitting is to be installed into
an aluminum port, installation torque is reduced.

4. Install the fitting into the port. Then, use a torque
wrench and socket to tighten the fitting to the recom­mended installation torque shown in Figure 5.

NOTE: Use of an offset wrench (e.g. crowfoot wrench)
will affect torque wrench calibration due to the effective
length change of the torque wrench. Tightening torque
when using a torque wrench with an offset wrench will
be less than the recommended installation torque. See
Using a Torque Wrench with an Offset Wrench in the
Torque Specifications section of Chapter 2 − Product
Records and Maintenance to determine necessary con­version information.

5. If a torque wrench is not available or if space at the
port prevents use of a torque wrench, an alternate meth­od of assembly is the Flats From Finger Tight (F.F.F.T.)
method.

A. Install the fitting into the port and tighten it down
full length until finger tight.

B. If port material is steel, tighten the fitting to the
listed F.F.F.T. If port material is aluminum, tighten fit­ting to 60% of listed F.F.F.T.

Size F.F.F.T.

4 (1/4 in. nominal hose or tubing) 1.00 +
6 (3/8 in.) 1.50 +
8 (1/2 in.) 1.50 +
10 (5/8 in.) 1.50 +
12 (3/4 in.) 1.50 + 0.25
16 (1 in.) 1.50 +

Fitting

O−ring

0.25

0.25

0.25

0.25

0.25

Figure 4

System

Hydraulic

Fitting

Dash Size

Fitting Port Side

Thread Size

Installation Torque Into

Steel Port

Installation Torque Into

Aluminum Port

4 7/16 − 20 15 to 19 ft−lb (21 to 25 N−m) 9 to 11 ft−lb (13 to 15 N−m)
5 1/2 − 20 18 to 22 ft−lb (25 to 29 N−m) 11 to 15 ft−lb (15 to 20 N−m)
6 9/16 − 18 34 to 42 ft−lb (47 to 56 N−m) 20 to 26 ft−lb (28 to 35 N−m)
8 3/4 − 16 58 to 72 ft−lb (79 to 97 N−m) 35 to 43 ft−lb (48 to 58 N−m)

10 7/8 − 14 99 to 121 ft−lb (135 to 164 N−m) 60 to 74 ft−lb (82 to 100 N−m)
12 1 1/16 − 12 134 to 164 ft−lb (182 to 222 N−m) 81 to 99 ft−lb (110 to 134 N−m)
14 1 3/16 − 12 160 to 196 ft−lb (217 to 265 N−m) 96 to 118 ft−lb (131 to 160 N−m)
16 1 5/16 − 12 202 to 248 ft−lb (274 to 336 N−m) 121 to 149 ft−lb (165 to 202 N−m)
20 1 5/8 − 12 247 to 303 ft−lb (335 to 410 N−m) 149 to 183 ft−lb (202 to 248 N−m)

Figure 5

Multi Pro 5800 Hydraulic SystemPage 5 − 7

Adjustable Fitting (Fig. 6)

1. Make sure all threads and sealing surfaces of fitting
and component port are free of burrs, nicks, scratches
or any foreign material.

2. As a preventative measure against leakage, it is rec­ommended that the O−ring be replaced any time the
connection is opened.

3. Lightly lubricate the O−ring with clean hydraulic oil.
Fitting threads should be clean with no lubricant applied.

4. Turn back the lock nut as far as possible. Make sure
the back up washer is not loose and is pushed up as far
as possible (Step 1 in Figure 7).

IMPORTANT: Before installing fitting into port, de­termine port material. If fitting is to be installed into
an aluminum port, installation torque is reduced.

Lock Nut

Back−up Washer

O−ring

Figure 6

5. Install the fitting into the port and tighten finger tight
until the washer contacts the face of the port (Step 2 in
Figure 7). Make sure that the fitting does not bottom in
the port during installation.

6. To put the fitting in the desired position, unscrew it by
the required amount to align fitting with incoming hose
or tube, but no more than one full turn (Step 3 in Figure

7).

7. Hold the fitting in the desired position with a wrench
and use a torque wrench to tighten the lock nut to the
recommended installation torque shown in Figure 5.
This tightening process will require the use of an offset
wrench (e.g. crowfoot wrench). Use of an offset wrench
will affect torque wrench calibration due to the effective
length change of the torque wrench. Tightening torque
when using a torque wrench with an offset wrench will
be lower than the listed installation torque (see Using a
Torque Wrench with an Offset Wrench in the Torque
Specifications section of Chapter 2 − Product Records
and Maintenance).

8. If a torque wrench is not available or if space at the
port prevents use of a torque wrench, an alternate meth­od of assembly is the Flats From Finger Tight (F.F.F.T.)
method. Hold the fitting in the desired position with a
wrench and, if port material is steel, tighten the lock nut
with a second wrench to the listed F.F.F.T. (Step 4 in Fig­ure 7). If port material is aluminum, tighten fitting to 60%
of listed F.F.F.T.

Step 3Step 1

Step 2 Step 4

Figure 7

Size F.F.F.T.

4 (1/4 in. nominal hose or tubing) 1.00 +
6 (3/8 in.) 1.50 + 0.25
8 (1/2 in.) 1.50 +
10 (5/8 in.) 1.50 +
12 (3/4 in.) 1.50 + 0.25
16 (1 in.) 1.50 +

0.25

0.25

0.25

0.25

Multi Pro 5800Hydraulic System Page 5 − 8

Hydraulic Schematic

ROD: 0.63”

BORE: 1.50”

STROKE: 8.50”

STEERING CYLINDER

ROD: 1.13”

BORE: 1.75”

STROKE: 10.06”

EXTEND TO LOWER

CD EF

ROD: 1.13”

BORE: 1.75”

LIFT CYLINDER LIFT CYLINDER

STROKE: 10.06”

EXTEND TO LOWER

CV

6.0 CID

OR

.040”

SPRAYER PUMP DRIVE MOTOR

LR

OR4

.036”

OR3

.036”

OR1

.036”

OR2

.036”

4.3 CID

PC1 PC2

PV

UNIT

STEERING
PET

S2 S3

80 PSI

LC

2000 PSI

MANIFOLD

G

S1

PUMP CONTROL

PT

4.3 GPM

12.1 GPM

B

BOOM LIFT MANIFOLD

A

GP

4.5 GPM

50 PSI

T

GEAR PUMP

FILTER

CHARGE

OIL

COOLER

50 PSI

FILTER

RETURN

1015 PSI

P1 P2

.42 CID

INTERNAL

CHARGE PUMP

31.6 GPM

.34 CID

.95 CID

A

4000 PSI

A

2.48 CID 2.48 CID
B

(UPPER)

TOW

VALVE

11.96:1 11.96:1

RH LH

B

WHEEL

MOTORS

A

B

4000 PSI

(LOWER)

NOTE: A larger hydraulic schematic is

included in Chapter 8 − Foldout Drawings

System

Hydraulic

BREATHER

SUCTION

STRAINER

CD EF

C2 C1 C3 C4 C2 C1 C3 C4

S4 S5

S2 S3

Multi Pro 5800 Hydraulic SystemPage 5 − 9

LC

80 PSI

OR .030”

SH

FORWARD

AB

GP

OPTIONAL ULTRA SONIC BOOM MANIFOLD MODEL #41219

2.48 CID

.032”

.032” .032”

3100 RPM

ENGINE RATED SPEED

250 PSI

REVERSE

TRACTION (PISTON) PUMP

Hydraulic Flow Circuits

1015 PSI

A

B

50 PSI

4.5 GPM

GEAR PUMP

FILTER

CHARGE

P1 P2

INTERNAL

CHARGE PUMP

31.6 GPM

.34 CID

.95 CID

.42 CID

WHEEL

MOTORS

11.96:1 11.96:1

2.48 CID 2.48 CID
RH LH

B

A

A

(UPPER)

TOW

VALVE

4000 PSI

.032”

B

(LOWER)

4000 PSI

250 PSI

BREATHER

SUCTION

STRAINER

FORWARD

2.48 CID
.032” .032”

3100 RPM

ENGINE RATED SPEED

Figure 8

REVERSE

TRACTION (PISTON) PUMP

Flow

Return or Suction

Working Pressure

Low Pressure (Charge)

Traction Circuit (Forward Shown)

Multi Pro 5800Hydraulic System Page 5 − 10

Traction Circuit

The traction circuit piston pump is a variable displace­ment pump that is directly coupled to the engine fly­wheel. Pushing the traction pedal engages a hydraulic
servo valve which controls the variable displacement
piston pump swash plate to create a flow of oil. Pushing
the top of the traction pedal rotates the pump swash
plate to create a flow of oil for forward machine move­ment. Pushing the bottom of the traction pedal rotates
the pump swash plate to cause oil flow for reverse ma­chine movement. This oil flow is directed to drive the rear
wheel motors. Operating pressure on the high pressure
side of the closed traction circuit loop is determined by
the amount of load developed at the fixed displacement
wheel motors. As the load increases, circuit pressure
can increase to relief valve settings: 4000 PSI (276 bar)
in either forward or reverse. If pressure exceeds the re­lief setting, oil flows through the relief valve to the low
pressure side of the closed loop traction circuit.

Traction circuit pressure (forward or reverse) can be
measured by installing a tee fitting and gauge into the
traction system hydraulic lines.

The piston (traction) pump and wheel motors use a
small amount of hydraulic oil for internal lubrication. Oil
is designed to leak across pump and motor parts into the
case drain. This leakage results in the loss of hydraulic
oil from the closed loop traction circuit that must be re­placed.

The piston (traction) pump assembly includes a charge
pump that provides make−up oil for the traction circuit.
This gerotor gear pump is driven by the piston pump
drive shaft. It provides a constant supply of charge oil to
the traction circuit to make up for oil that is lost due to in­ternal leakage in the piston pump and wheel motors.

Charge pump flow is directed through the charge oil filter
and then to the low pressure side of the closed loop trac­tion circuit. Pressure in the charge circuit is limited by a
relief valve located in the charge plate adapter on the
rear of the piston pump. Charge circuit pressure (250 to
300 PSI (17 to 21 bar)) can be measured at the test port
located on the tee fitting at the charge oil filter.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 11

ROD: 0.63”

BORE: 1.50”

STROKE: 8.50”

STEERING CYLINDER

PISTON MOVEMENT

ROD: 0.63”

BORE: 1.50”

STROKE: 8.50”

STEERING CYLINDER STEERING CYLINDER

STEERING CYLINDER

LR

LR

4.3 CID

4.3 CID

UNIT

STEERING

PET

UNIT

STEERING

PET

RIGHT TURN

LEFT TURN

ROD: 0.63”

BORE: 1.50”

STROKE: 8.50”

STEERING CYLINDER

STEERING CYLINDER

NO PISTON MOVEMENT PISTON MOVEMENT

LR

Figure 9

4.3 CID

UNIT

STEERING

PET

NEUTRAL POSITION

Flow

Return

Working Pressure

Steering Circuit

Multi Pro 5800Hydraulic System Page 5 − 12

Steering Circuit

A two (2) section gear pump is coupled to the piston
(traction) pump. The front gear pump section (closest to
the piston pump) supplies hydraulic flow to the spray
pump drive circuit. The rear gear pump section supplies
hydraulic flow to both the steering and spray boom lift/
lower circuits. Hydraulic pump flow from the rear pump
section is routed to the steering control valve first so the
steering circuit has priority. The gear pump takes its suc­tion from the hydraulic reservoir. Steering and boom lift/
lower circuit pressure is limited to 1015 PSI (69 bar) by
a relief valve located in the gear pump.

The steering control valve includes a check valve that al­lows steering operation when the engine is not running.
Steering wheel rotation with the engine off results in oil
flow from the steering control gerotor. The check valve
opens in this situation to allow oil flow from the steering
control to the steering cylinder in a closed loop.

Steering circuit pressure can be measured by installing
a pressure gauge to the test port fitting at the gear pump
outlet. Hydraulic flow for the steering circuit can be moni­tored at the outlet of the rear gear pump section.

No Turn (Fig. 9)

With the steering wheel in the neutral position and the
engine running, gear pump flow enters the steering con­trol valve (port P) and goes through the steering control
spool valve, by−passing the rotary meter and steering
cylinder. Flow leaves the control valve (port E) and is
routed to the boom lift valve, oil filter and finally returns
to the hydraulic oil reservoir.

Left Turn (Fig. 9)

When a left turn is made with the engine running, the
turning of the steering wheel positions the spool valve so
that flow goes through the bottom of the spool. Flow en­tering the steering control valve from the gear pump
goes through the spool and is routed through the rotary
meter (V1) and out the L port. Pressure extends the
steering cylin d e r f o r a left turn. The rotary meter ensures
that the oil flow to the cylinder is proportional to the
amount of the turning on the steering wheel. Fluid leav­ing the cylinder flows back through the spool valve, then
to the oil cooler and returns to the reservoir.

The steering control valve returns to the neutral position
when turning is completed.

Right Turn (Fig. 9)

When a right turn is made with the engine running, the
turning of the steering wheel positions the spool valve so
that flow goes through the top of the spool. Flow entering
the steering control valve from the gear pump goes
through the spool and is routed through rotary meter
(V1) and goes out port R. Pressure retracts the steering
cylinder for a right turn. The rotary meter ensures that
the oil flow to the cylinder is proportional to the amount
of the turning on the steering wheel. Fluid leaving the
cylinder flows back through the spool valve, then to the
oil cooler and returns to the reservoir.

The steering control valve returns to the neutral position
when turning is completed.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 13

SPRAYER PUMP DRIVE MOTOR

ROD: 0.63”

BORE: 1.50”

STROKE: 8.50”

LR

STEERING CYLINDER

6.0 CID

LC

2000 PSI

MANIFOLD

G

PUMP CONTROL

PT

.040”

PV

4.3 CID

80 PSI

UNIT

STEERING
PET

CV

OR

OIL

COOLER

ROD: 1.13”

BORE: 1.75”

STROKE: 10.06”

EXTEND TO LOWER

CD EF

ROD: 1.13”

BORE: 1.75”

LIFT CYLINDER LIFT CYLINDER

STROKE: 10.06”

EXTEND TO LOWER

OR4

.036”

4.3 GPM

50 PSI

12.1 GPM

4.5 GPM

GEAR PUMP

FILTER

CHARGE

OR3

.036”

OR1

.036”

C2 C1 C3 C4

PC1 PC2

OR2

.036”

S2 S3

S1

BOOM LIFT MANIFOLD

A B

GP

50 PSI

FILTER

RETURN

1015 PSI

.34 CID

.95 CID

P1 P2

.42 CID

INTERNAL

CHARGE PUMP

31.6 GPM

A

4000 PSI

.032”

A

2.48 CID 2.48 CID
B

(UPPER)

TOW

VALVE

11.96:1 11.96:1

RH LH

B

WHEEL

MOTORS

A

B

4000 PSI

250 PSI

(LOWER)

BREATHER

SUCTION

STRAINER

Flow

Working Pressure

Return or Suction

(Spray Pump Switch in ON Position)

Spray Pump Drive Circuit

Figure 10

FORWARD

2.48 CID

.032” .032”

3100 RPM

ENGINE RATED SPEED

REVERSE

TRACTION (PISTON) PUMP

Multi Pro 5800Hydraulic System Page 5 − 14

Spray Pump Drive Circuit

A two (2) section gear pump is coupled to the piston
(traction) pump. The front gear pump section (closest to
the piston pump) supplies hydraulic flow to the spray
pump drive circuit. The rear gear pump section supplies
hydraulic flow to both the steering and spray boom lift/
lower circuits. The gear pump takes its suction from the
hydraulic reservoir.

Hydraulic flow control for the spray pump drive motor is
completed by the spray pump control manifold. The
spray pump control manifold is mounted directly to the
hydraulic motor that drives the spray pump. The pump
control manifold includes a solenoid controlled propor­tional valve (PV) that allows adjustment of the hydraulic
flow to the spray pump motor. A pressure compensator
valve (LC) located in the pump control manifold main­tains a pressure differential of 80 PSI (5.5 bar) across
the proportional valve (PV). Spray pump circuit pressure
is limited to 2000 PSI (138 bar) by a relief valve located
in the spray pump control manifold.

Spray pump drive circuit hydraulic flow can be moni­tored at the outlet of the front gear pump section. Circuit
pressure can be measured at a diagnostic fitting in port
G on the spray pump control manifold.

Machines with manually operated spray systems use
the spray pump On/Off and application rate switches as
inputs to adjust the electrical current to the control man­ifold solenoid (adjustable application rate).

Machines with ExcelaRate or GeoLink spray systems
use the spray pump enable switch, the application rate
switch, the flow meter and the speed sensor as inputs
to adjust electrical current to the control manifold sole­noid (variable application rate).

Spray Pump Enable Switch ON (Fig. 10)

With the engine running and the spray pump enable
switch in the ON position, the proportional valve (PV) in
the spray pump control manifold is energized. Based on
available current (mA) supplied by the TEC, the spool in
the proportional valve directs some gear pump flow out
the M1 port of the manifold to the spray pump hydraulic
motor. This hydraulic flow causes the motor to rotate the
spray system pump for spray system operation. The
manifold pressure compensator valve (LC) maintains a
pressure differential of 80 PSI (5.5 bar) across the pro­portional valve (PV). Any excess flow above what the
proportional control valve is electrically adjusted for, is
by−passed to the reservoir through the compensator
valve. Hydraulic flow returns out the manifold T port, to
the oil cooler and then to the hydraulic oil reservoir.

SPRAYER PUMP DRIVE MOTOR

6.0 CID

CV

OR

.040”

PV

80 PSI

LC

G

PT

PUMP CONTROL

Spray Pump Switch in OFF Position

(Spray Pump Motor NOT Rotating)

2000 PSI

MANIFOLD

Figure 11

Spray Pump Enable Switch OFF (Fig. 11)

With the engine running and the spray pump switch in
the OFF position, the solenoid valve in the spray pump
control manifold is not energized. All gear pump flow to
the manifold is routed through the pressure compensa­tor valve (LC) in the manifold, directed out the T port of
the manifold, to the oil cooler and returns to the hydraulic
oil reservoir. The spray pump hydraulic motor receives
no hydraulic flow so the spray system pump is not ro­tated and no spray system flow is available.

The spray pump application rate (increase/decrease)
switch allows the operator to adjust electrical current to
the proportional valve (PV) solenoid via the TEC. Higher
current (rate increase) to the proportional valve solenoid
increases hydraulic flow to the spray pump motor and
results in a higher spray pump speed with more spray
system output/pressure. Lower current (rate decrease)
to the proportional valve solenoid decreases hydraulic
flow to the spray pump motor and results in a lower spray
pump speed with less spray system output/pressure.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 15

RH BOOM

CYLINDER

OR4

.036”

RATIO

3:1 PILOT

T

RETURN TO

FILTER AND

RESERVOIR

RAISE

RETRACT TO

LH BOOM

CYLINDER

LOWER SPRAY BOOM (LH SHOWN)

OR3

(DE−ENERGIZED)

.036”

OR1

.036”

(LOWER COIL

ENERGIZED)

C2 C1 C3 C4

PC1 PC2

OR2

OR4

.036”

.036”

RATIO

3:1 PILOT

S2 S3

S1

(ENERGIZED)

BOOM LIFT MANIFOLD

PUMP FLOW

GP

RH BOOM

CYLINDER

RAISE

RETRACT TO

RAISE SPRAY BOOM (LH SHOWN)

LH BOOM

CYLINDER

T

RETURN TO

FILTER AND

RESERVOIR

S2 S3

(DE−ENERGIZED)

ENERGIZED)

(UPPER COIL

OR3

.036”

OR1

.036”

C2 C1 C3 C4

OR2

.036”

PC1 PC2

S1

(ENERGIZED)

BOOM LIFT MANIFOLD

PUMP FLOW

GP

Return

Working Pressure

Flow

Spray Boom Lift Circuit

Figure 12

Multi Pro 5800Hydraulic System Page 5 − 16

Spray Boom Lift Circuit

A two (2) section gear pump is coupled to the piston
(traction) pump. The front gear pump section (closest to
the piston pump) supplies hydraulic flow to the spray
pump drive circuit. The rear gear pump section supplies
hydraulic flow to both the steering and spray boom lift/
lower circuits. Hydraulic pump flow from the rear pump
section is routed to the steering control valve first so the
steering circuit has priority. The gear pump takes its suc­tion from the hydraulic reservoir. Steering and boom lift/
lower circuit pressure is limited to 1015 PSI (69 bar) by
a relief valve located in the gear pump.

Spray boom lift circuit hydraulic flow can be monitored
at the outlet of the rear gear pump section. Circuit pres­sure can be measured at a diagnostic fitting in port G on
the boom lift control manifold.

The boom lift control manifold includes three (3) electri­cally operated valves. Solenoid valve (S1) is used to di­rect oil flow toward the boom lift cylinders when
energized or allow circuit flow to bypass the cylinders
when de−energized. Solenoid valve (S2) controls hy­draulic flow to raise or lower the left side boom lift cylin­der. Solenoid valve (S3) controls hydraulic flow to raise
or lower the right side boom lift cylinder. Solenoid valves
S1 and S2 each have 2 coils (upper and lower).

While operating the machine during conditions of not
raising or lowering a spray boom (boom lift switches in
the neutral (center) position), all of the boom lift control
manifold valves (S1, S2 and S3) are de−energized. The
de−energized valve (S1) allows hydraulic flow to return
to tank through the boom lift control manifold. Flow re­turns to the oil filter and then to the hydraulic reservoir.

Raise Spray Boom (Fig. 12)

When a boom lift switch is depressed to the raise posi­tion, manifold solenoid valves (S1) and the upper coil for
either solenoid valve (S2) (LH cylinder) or (S3) (RH cyl­inder) are energized. The energized (S1) directs oil flow
toward the manifold solenoid valves. The energized up­per coil of solenoid valve (S2 or S3) shifts the valve to
allow pump flow to be directed toward the rod end of the
lift cylinder through a manifold check valve and orifice
that controls lift speed. The lift cylinder retracts to raise
the boom section.

Displaced oil from the barrel end of the lift cylinder re­turns to the manifold, bypasses an orifice, is routed
through the shifted valve (S2 or S3), exits the control
manifold through port T, is routed to the oil filter and then
returns to the hydraulic reservoir.

When the lift switch is returned to the neutral (center)
position, the manifold solenoid valves are de−ener­gized. The de−energized valve (S1) allows hydraulic
flow to return to tank through the manifold. The boom lift
cylinder is held in the raised position by de−energized
valve (S2) (LH cylinder) or (S3) (RH cylinder).

Lower Spray Boom (Fig. 12)

When a boom lift switch is depressed to the lower posi­tion, manifold solenoid valves (S1) and the lower coil for
either solenoid valve (S2) (LH cylinder) or (S3) (RH cyl­inder) are energized. The energized (S1) directs oil flow
toward the manifold solenoid valves. The energized
lower coil of solenoid valve (S2 or S3) shifts the valve to
allow pump flow to be directed toward the barrel end of
the lift cylinder through an orifice that controls lowering
speed. The lift cylinder extends to lower the boom sec­tion.

As circuit pressure increases, a manifold sensing line
shifts the pilot operated check valve (PC1 for the LH cyl­inder or PC2 for the RH cylinder) to allow a return path
for oil from the rod end of the lift cylinder. Displaced oil
from the rod end of the lift cylinder returns to the man­ifold, bypasses an orifice, flows through the shifted
check valve, is routed through the shifted valve (S2 or
S3), exits the control manifold through port T, is routed
to the oil filter and then returns to the hydraulic reservoir.

When the lift switch is returned to the neutral (center)
position, the manifold solenoid valves are both de−ener­gized. The de−energized valve (S1) allows hydraulic
flow to return to tank through the manifold. The boom lift
cylinder is held in the raised position by de−energized
valve (S2) (LH cylinder) or (S3) (RH cylinder).

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 17

Special Tools

Order these special tools from your Toro Distributor.

Hydraulic Pressure Test Kit

Use to take various pressure readings for diagnostic
tests. Quick disconnect fittings provided attach directly
to mating fittings on machine test ports without tools. A
high pressure hose is provided for remote readings.
Contains one each: 1000 PSI (70 bar), 5000 PSI (350
bar) and 10000 PSI (700 bar) gauges. Use gauges as
recommended in the Testing section of this chapter.

Toro Part Number: TOR47009

15 GPM Hydraulic Tester Kit (Pressure and Flow)

Figure 13

Use to test hydraulic circuits and components for flow
and pressure capacities as recommended in the Testing
section of this chapter. This tester includes the following:

1. INLET HOSE: Hose connected from the system cir­cuit to the inlet side of the hydraulic tester.

2. LOAD VALVE: A simulated working load is created
in the circuit by turning the valve to restrict flow.

3. PRESSURE GAUGE: Glycerine filled 0 to 5000 PSI
gauge to provide operating circuit pressure.

4. FLOW METER: This meter measures actual oil flow
in the operating circuit with a gauge rated from 1 to 15
GPM (5 to 55 LPM).

5. OUTLET HOSE: A hose from the outlet side of the
hydraulic tester connects to the hydraulic system circuit.

6. FITTINGS: An assortment of hydraulic fittings are in­cluded with this kit.

Toro Part Number: TOR214678

Figure 14

Multi Pro 5800Hydraulic System Page 5 − 18

40 GPM Hydraulic Tester (Pressure and Flow)

Use to test hydraulic circuits and components for flow
and pressure capacities as recommended in the Testing
section of this chapter. This tester includes the following:

1. LOAD VALVE: A simulated working load is created
in the circuit by turning the valve to restrict flow.

2. PRESSURE GAUGE: Glycerine filled 0 to 5000 PSI
gauge to provide operating circuit pressure.

3. FLOW METER: This meter measures actual oil flow
in the operating circuit with a gauge rated from 4 to 40
GPM (20 to 150 LPM).

Toro Part Number: AT40002
NOTE: This tester does not include hydraulic hoses

(see Hydraulic Hose Kit TOR6007 below).

Hydraulic Hose Kit

This kit includes hydraulic fittings and hoses needed to
connect 40 GPM hydraulic tester (AT40002) or high flow
hydraulic filter kit (TOR6011) to machine hydraulic trac­tion system components.

Toro Part Number: TOR6007

Figure 15

Figure 16

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 19

High Flow Hydraulic Filter Kit

The high flow hydraulic filter kit is designed with large
flow (40 GPM/150 LPM) and high pressure (5000
PSI/345 bar) capabilities. This kit provides for bi−direc­tional filtration which prevents filtered debris from being
allowed back into the circuit regardless of flow direction.

If a component failure occurs in the closed loop traction
circuit, contamination from the failed part will remain in
the circuit until removed. When connecting hydraulic
test gauges in order to test traction circuit components
or after replacing a failed traction circuit component (e.g.
hydrostat or wheel motor), the high flow hydraulic filter
can be installed in the traction circuit. The filter will en­sure that contaminates are removed from the closed
loop and th u s , d o n ot ca u s e additional component dam­age.

Toro Part Number: TOR6011
NOTE: This kit does not include hydraulic hoses (see

Hydraulic Hose Kit TOR6007 above).
NOTE: Replacement filter element is Toro part number

TOR6012. Filter element cannister tightening torque is
25 ft−lb (34 N−m).

Figure 17

O−Ring Kit

The kit includes O−rings in a variety of sizes for face seal
and port seal hydraulic connections. It is recommended
that O−rings be replaced whenever a hydraulic connec­tion is loosened.

Toro Part Number: 117−2727

Figure 18

Multi Pro 5800Hydraulic System Page 5 − 20

Hydraulic Test Fitting Kit

This kit includes a variety of O−ring Face Seal fittings to
enable connection of test gauges to the hydraulic sys­tem.

The kit includes: tee’s, unions, reducers, plugs, caps
and test fittings.

Toro Part Number: TOR4079

Remote Starter Switch

TORO TEST FITTING KIT (NO. TOR4079)

Figure 19

After flushing the hydraulic system or replacing a hy­draulic component (e.g. gear pump, piston pump, wheel
motor), it is necessary to prime the hydraulic pumps. A
remote starter switch (Fig. 20) should be used for this
purpose on machines with an engine control module
(ECM) like the Multi Pro 5800−G. Obtain a remote
starter switch locally.

IMPORTANT: When using a remote starter switch, it
is highly recommended to include a 20 amp in−line
fuse between the battery and switch connector for
circuit protection.

A remote stater switch can also be constructed using
Toro switch #106−2027, a length of 14 gauge wire, a 20
amp in−line fuse, two (2) alligator clips and necessary
connectors. Connecting the wire to switch terminals 1
and 2 will allow the momentary switch contacts to be
used for the remote starter switch (Fig. 21).

NOTE: For information on using the remote starter
switch to prime the hydraulic pumps, see Priming Hy­draulic Pumps in the Service and Repairs section of this
chapter.

MACHINE
BATTERY

STARTER

SOLENOID

MACHINE

STARTER

20 AMP

FUSE

Figure 21

TORO SWITCH

(#106−2027)

System

Hydraulic

Figure 20

Multi Pro 5800 Hydraulic SystemPage 5 − 21

Troubleshooting

The cause of an improperly functioning hydraulic sys­tem is best diagnosed with the use of proper testing
equipment and a thorough understanding of the com­plete hydraulic system.

A hydraulic system with an excessive increase in heat
or noise has a potential for failure. Should either of these
conditions be noticed, immediately stop the machine,
turn off the engine, locate the cause of the trouble and
correct it before allowing the machine to be used again.

Problem

Hydraulic oil leaks.

Foaming hydraulic fluid.

Hydraulic system operates hot.

Possible Cause

Hydraulic fitting(s) or hose(s) are loose or damaged.
O−ring(s) or seal(s) are missing or damaged.

Oil level in reservoir is incorrect.
Hydraulic system has wrong kind of oil.
Piston and/or gear pump suction line has an air leak.
Water has contaminated the hydraulic system.

Oil level in reservoir is incorrect.

Continued use of an improperly functioning hydraulic
system could lead to extensive internal component
damage.

The chart that follows contains information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.

Refer to the Testing section of this Chapter for precau­tions and specific test procedures.

Machine operates in one direction
only.

Traction pedal is sluggish.

Hydraulic hose is kinked.
Oil is contaminated or incorrect viscosity.
Brakes are engaged or sticking.
Piston pump by−pass valve is open or damaged.
Hydraulic oil cooling system is not operating properly.
Charge pressure is low.
Traction circuit pressure is incorrect.
Wheel motor(s) or spray pump motor is/are worn or damaged.
Gear pump or piston (traction) pump is worn or damaged.

Traction control linkage is faulty.
System charge check valve and/or system relief valve is defective.

Traction control linkage is stuck or binding.
Charge pressure is low.
Piston (traction) pump servo control valve orifices are plugged or

damaged.

Piston pump manual servo control assembly is damaged.
Piston pump or wheel motor(s) is worn or damaged.

Multi Pro 5800Hydraulic System Page 5 − 22

Machine travels too far before stop­ping when the traction pedal is re­leased.

Traction linkage is binding or out of adjustment.
Traction pedal does not return to neutral position when pedal is re-

leased.
Charge pressure is low.
Piston (traction) pump servo control valve orifices are plugged or da-

maged.
Piston pump manual servo control assembly is damaged.

Traction power is lost or machine will
not operate in either direction.

Steering is inoperative or sluggish.

Brakes are engaged or sticking.
Traction control linkage is damaged or disconnected.
Oil level in reservoir is low.
Piston pump by−pass valve is open or damaged.
Charge pressure is low.
Traction circuit pressure is low.
Rear wheel motor couplers are damaged.

Engine speed is too low.
Steering cylinder is binding.
Oil level in reservoir is low.
Check valve in steering control valve is sticking, worn or damaged.
Relief valve in gear pump is faulty.
Steering control valve is worn or damaged.
Steering cylinder leaks internally.

System

Hydraulic

Rear gear pump section is worn or damaged (boom lift circuit af­fected as well).

Rotating the steering wheel turns

Hoses to the steering cylinder are reversed.

machine in the wrong direction.

Steering cylinder has internal leak.

Spray pump hydraulic motor does

Pump switch is not in engaged position.

not rotate.

Pump control manifold solenoid coil (PV) or circuit wiring has elec­trical problem (see Chapter 5 − Electrical System).

Pump control manifold solenoid valve (PV) is sticking or damaged.
Spray pump hydraulic motor is worn or damaged.
Front gear pump section is worn or damaged.

Multi Pro 5800 Hydraulic SystemPage 5 − 23

One of the spray booms does not
raise or lower.

Affected spray boom pivot is worn, binding or damaged.
Boom lift control manifold solenoid coil (S2 or S3) or circuit wiring

for affected boom has electrical problem (see Chapter 5 − Electrical
System).

Boom lift control manifold solenoid valve for affected boom is stick­ing or damaged (left boom = S2, right boom = S3, upper coil = raise
boom, lower coil = lower boom).

Boom lift control manifold pilot operated check valve for affected
boom (PC1 or PC2) is sticking or damaged.

Boom lift control manifold orifice for affected boom is plugged or
damaged.

Lift cylinder is worn or damaged.

Neither of the spray booms will raise
or lower.

One of the spray booms will not re­main in the raised position.

NOTE: Lift cylinders cannot provide
an absolutely perfect seal. A spray
boom may eventually lower during
storage.

Oil level in reservoir is low.
Boom lift control manifold solenoid coil S1 or circuit wiring has elec-

trical problem (see Chapter 5 − Electrical System).
Boom lift control manifold solenoid valve S1 is sticking or damaged.
Check valve in steering control valve is sticking, worn or damaged.
Relief valve in gear pump is faulty.
Rear gear pump section is worn or damaged (steering circuit af-

fected as well).
Boom lift control manifold pilot operated check valve for affected

boom (PC1 or PC2) is sticking or damaged.
Cartridge valve seals are leaking in boom lift control manifold.
Lift cylinder for affected boom leaks internally.
Hydraulic hoses to lift cylinder for affected boom are incorrectly

installed.

Multi Pro 5800Hydraulic System Page 5 − 24

This page is intentionally blank.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 25

Testing

The most effective method for isolating problems in the
hydraulic system is by using hydraulic test equipment
such as pressure gauges and flow meters in the hydrau­lic circuits during various operational checks (see the
Special Tools section in this Chapter).

Before Performing Hydraulic Tests
IMPORTANT: All obvious areas such as hydraulic

oil supply, oil filter, binding linkages, loose fasten­ers or improper adjustments must be checked be­fore assuming that a hydraulic component is the
source of a hydraulic problem.

CAUTION

All testing should be performed by two (2)
people. One person should be in the seat to oper­ate the machine and the second person should
read and record test results.

1. Clean machine thoroughly before disconnecting or
disassembling any hydraulic components. Always keep
in mind the need for cleanliness when working on hy­draulic system components. Contamination will cause
excessive wear of hydraulic components.

WARNING

Before performing any work on the hydraulic
system, system pressure must be relieved and
all rotating machine parts must come to a stop.
Turn ignition switch OFF and remove key from
switch. When engine has stopped rotating, oper­ate all hydraulic controls to relieve hydraulic
system pressure.

Precautions for Hydraulic Testing

CAUTION

Failure to use gauges with recommended pres­sure (PSI) rating as listed in test procedures
could result in damage to the gauge and possible
personal injury from leaking hot oil.

WARNING

2. Put metal caps or plugs on any hydraulic lines left
open or exposed during testing or after removal of com­ponents.

3. The engine must be in good operating condition. Use
a phototach (non−contact tachometer) when performing
a hydraulic test. Engine speed can affect the accuracy
of the test readings. Monitor engine RPM during hy­draulic testing. Use the information below when per­forming hydraulic system tests. If engine RPM is above
or below the specified speed during a test, you will need
to adjust the expected hydraulic performance paramet­ers (aprox. 3% per 100 engine rpm at full throttle)

IMPORTANT: Hydraulic component output volume
relates directly to engine RPM. For every 100 engine
rpm the following component output volumes will
change by the volume listed.

Hydrostat: 100 engine RPM = 1.07 GPM or 137.4 oz.
(4.06 ltr) of hydraulic fluid displaced per minute

Internal Charge Pump: 100 engine RPM = 0.18 GPM
or 23.3 oz. (688 cc) of hydraulic fluid displaced per
minute

Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Do not use hands to search for leaks;
use paper or cardboard. Hydraulic fluid escap­ing under pressure can have sufficient force to
penetrate the skin and cause serious injury. If
fluid is injected into the skin, it must be surgical­ly removed within a few hours by a doctor famil­iar with this type of injury. Gangrene may result
from such an injury.

Gear Pump (P1): 100 engine RPM = 0.41 GPM or

52.6 oz. (1556 cc) of hydraulic fluid displaced per
minute

Gear Pump (P2): 100 engine RPM = 0.15 GPM or

118.8 oz. (557 cc) of hydraulic fluid displaced per
minute

NOTE: The hydraulic pumps are connected directly to
the engine crankshaft, so 1 engine RPM = 1 pump RPM.

Multi Pro 5800Hydraulic System Page 5 − 26

4. The inlet and the outlet hoses for tester with pressure
and flow capabilities must be properly connected. If
hoses are reversed, damage to the hydraulic tester or
components can occur.

5. When using hydraulic tester with pressure and flow
capabilities, completely open tester load valve before
starting engine to minimize the possibility of damage to
components.

6. Install tester fittings finger tight and far enough to
make sure that they are not cross−threaded before tight­ening them with a wrench.

Which Hydraulic Tests Are Appropriate

Before beginning any hydraulic test, identify if the prob­lem is related to the traction circuit, spray pump drive cir­cuit, steering circuit or spray boom lift circuit. Once the
faulty system has been identified, perform tests that re­late to that circuit.

1. If a traction circuit problem exists, consider perform­ing one or more of the following tests: Traction Circuit
Charge Pressure, Traction Circuit Relief Pressure,
Wheel Motor Efficiency, Charge Pump Flow and/or Pis­ton (Traction) Pump Flow Tests.

7. Position tester hoses to prevent rotating machine
parts from contacting and damaging the hoses or tester .

8. Check oil level in the hydraulic reservoir. After con­necting test equipment, make sure reservoir is full.

9. Check control linkages for improper adjustment,
binding or broken parts.

10.After installing test gauges, run engine at low speed
and check for any hydraulic oil leaks.

11.All hydraulic tests should be made with the hydraulic
oil at normal operating temperature.

12.Before returning machine to use, make sure that hy­draulic reservoir has correct fluid level. Also, check for
hydraulic leaks after test equipment has been removed
from hydraulic system.

IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter for information regarding the importance of
removing contamination from the traction circuit af­ter a component failure.

2. If a steering circuit problem exists, consider perform­ing one or more of the following tests: Steering and
Boom Lift/Lower Circuit Relief Pressure, Steering Cylin­der Internal Leakage and/or Steering and Boom Lift/
Lower Gear Pump Flow Tests.

3. If a spray pump drive circuit problem exists, consider
performing one or more of the following tests: Spray
Pump Drive Circuit Pressure, Spray Pump Drive Relief
Pressure or Spray Pump Drive Gear Pump Flow Tests.

4. If a spray boom lift/lower circuit problem exists, con­sider performing one or more of the following tests:
Steering and Boom Lift/Lower Circuit Relief Pressure
and/or Steering and Boom Lift/Lower Gear Pump Flow
Tests.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 27

Traction Circuit − Charge Pressure Test

GAUGE

PRESSURE

50 PSI

4.5 GPM

GEAR PUMP

FILTER

CHARGE

1015 PSI

P1 P2

INTERNAL

CHARGE PUMP

31.6 GPM

.34 CID

.95 CID

.42 CID

A

B

WHEEL

11.96:1 11.96:1

MOTORS

2.48 CID 2.48 CID
RH LH

B

A

A

(UPPER)

TOW

VALVE

4000 PSI

B

(LOWER)

4000 PSI

BREATHER

SUCTION

STRAINER

FORWARD

2.48 CID

.032”

.032” .032”

3100 RPM

ENGINE RATED SPEED

Figure 22

250 PSI

REVERSE

TRACTION (PISTON) PUMP

Multi Pro 5800Hydraulic System Page 5 − 28

Traction Circuit − Charge Pressure Test

The traction circuit charge pressure test should be per­formed to make sure that the traction charge circuit is
functioning correctly.

1. Make sure hydraulic oil is at normal operating tem­perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.

2. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch. After turning engine off, operate all hydraulic
controls to relieve hydraulic system pressure.

CAUTION

Prevent personal injury and/or damage to equip­ment. Read all WARNINGS, CAUTIONS and Pre­cautions for Hydraulic Testing at the beginning
of this section.

3. Thoroughly clean test port on tee fitting at charge cir­cuit oil filter (under the hydraulic reservoir − Fig. 23).
Install 1000 PSI (70 bar) pressure gauge to test port fit­ting.

4. After installing pressure gauge, start engine and run
at low idle speed. Check for hydraulic leakage and cor­rect before proceeding with test.

5. Operate the engine at high idle engine speed (Diesel

Engine: 3050 to 3150 RPM, Gasoline Engine: 3200
RPM) with no load on the traction circuit (traction pedal

in the neutral position).

GAUGE READING: 250 to 300 PSI (17 to 21 bar)

6. Stop engine and record test results.

7. If there is no pressure or pressure is low, check for
restriction in pump suction line. Also, inspect charge re­lief valve located in charge pump adapter on piston
pump (see Piston (Traction) Pump Service in the Ser­vice and Repairs section of this chapter). If necessary,
check for damage or worn parts in internal charge pump.

1

Figure 23

1. Charge circuit oil filter 2. Test port

8. With the pressure gauge still connected to the test fit­ting on oil filter, take a pressure reading while applying
load to the traction circuit in both forward and reverse.

A. Attach a heavy chain to the rear of the machine
frame and an immovable object to prevent the ma­chine from moving during testing.

B. Chock the wheels to prevent wheel rotation dur­ing testing.

C. Start the engine and put throttle at high idle en­gine speed (Diesel Engine: 3050 to 3150 RPM,
Gasoline Engine: 3200 RPM).

D. Engage the brake and push the traction pedal for­ward while monitoring the pressure gauge. Repeat
for reverse direction. Record highest pressure read­ing obtained in each direction.

E. Stop engine and record test results.

9. If charge pressure drops more than 15% when under
traction load, the piston (traction) pump and/or rear
wheel motor(s) should be suspected of wear and ineffi­ciency. The charge pump (integrated into the traction
(piston) pump may be worm or damaged, or the piston
pump and/or wheel motor(s) are worn or damaged. In
each example, the charge pump is not able to keep up
with internal leakage in traction circuit components.

2

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 29

10.After testing is completed, disconnect pressure
gauge from piston pump and reinstall cap over test port.

Traction Circuit − Charge Pump Flow Test

1015 PSI

A

WHEEL

2.48 CID 2.48 CID
RH LH

B

B

MOTORS

11.96:1 11.96:1

A

TESTER WITH

AND FLOW METER

PRESSURE GUAGE

50 PSI

4.5 GPM

CHARGE

FILTER

GEAR PUMP

INTERNAL

31.6 GPM

.34 CID

.95 CID

P1 P2

.42 CID

CHARGE PUMP

A

(UPPER)

TOW

VALVE

4000 PSI

.032”

B

(LOWER)

4000 PSI

250 PSI

BREATHER

SUCTION

STRAINER

FORWARD

2.48 CID
.032” .032”

ENGINE

3100 RPM

RATED SPEED

Figure 24

REVERSE

TRACTION (PISTON) PUMP

Multi Pro 5800Hydraulic System Page 5 − 30

Traction Circuit − Charge Pump Flow Test

The charge pump flow test should be performed to make
sure that the traction charge circuit has adequate hy­draulic flow.

1. Make sure hydraulic oil is at normal operating tem­perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.

2. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch. After turning engine Off, operate all hydraulic
controls to relieve hydraulic system pressure.

CAUTION

Prevent personal injury and/or damage to equip­ment. Read all WARNINGS, CAUTIONS and Pre­cautions for Hydraulic Testing at the beginning
of this section.

3. Thoroughly clean tee fitting and hydraulic hose at the
front of the charge circuit oil filter under the hydraulic
reservoir (Fig. 25).

IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
flow from the pump (disconnected hose), through
the tester and into the oil filter (tee fitting).

4. Install tester with pressure gauge and flow meter in
series with the tee fitting and the disconnected hose.

Make sure the tester flow control valve is fully open.

5. Start engine and run at low idle speed. Check for any
hydraulic leakage from tester and hose connection. Cor­rect any leaks before proceeding.

6. Move throttle so engine is running at high idle speed

(Diesel Engine: 3050 to 3150 RPM, Gasoline Engine:
3200 RPM).

7. Have second person carefully watch pressure gauge
on tester while slowly closing the flow control valve until
400 PSI (28 bar) is obtained. Verify engine speed with
a phototac.

1 2

3

Figure 25

1. Charge circuit oil filter

2. Tee fitting

3. Hydraulic hose

NOTE: If engine speed drops below specified RPM,

pump flow will decrease. Adjust test specifications ac­cordingly (see Testing in this chapter).

8. Observe flow gauge. Flow indication should be
approximately 4.5 GPM (17 LPM).

9. Release traction pedal to the neutral position, open
flow control valve on tester and shut off engine. Record
test results.

10.If flow is less than 4 GPM (15 LPM), check for restric­tion in pump suction line. If suction line is not restricted,
the charge pump in the piston (traction) pump assembly
needs to be repaired or replaced as necessary (see Pis­ton (Traction) Pump Service in this chapter).

11.When testing is complete, disconnect tester from tee
fitting and machine hydraulic hose. Reconnect machine
hydraulic hose to tee fitting.

12.Start engine and run at low idle speed. Check for hy­draulic leakage and correct before returning machine to
service.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 31

Traction Circuit − Wheel Motor Efficiency Test

50 PSI

CHARGE

FILTER

FORWARD

ENGINE

RATED SPEED

3100 RPM

2.48 CID

.032” .032”

REVERSE

31.6 GPM

.032”

250 PSI

CHARGE PUMP

4000 PSI

4000 PSI

INTERNAL

.42 CID

TOW

VALVE

4.5 GPM

A

(UPPER)

B

(LOWER)

GEAR PUMP

P1 P2

.95 CID

.34 CID

TESTER WITH

PRESSURE GUAGE

AND FLOW METER

1015 PSI

HYDRAULIC LINE (REMOVED)

B

11.96:1 11.96:1

RH LH

2.48 CID
WHEEL

A

MOTORS

CAPCAP

A

B

2.48 CID

TRACTION (PISTON) PUMP

RH WHEEL MOTOR EFFICIENCY TEST

FORWARD

2.48 CID

ENGINE

RATED SPEED

3100 RPM

.032” .032”

.032”

250 PSI

REVERSE

CHARGE

31.6 GPM

50 PSI

FILTER

CHARGE PUMP

4000 PSI

4000 PSI

SUCTION

STRAINER

INTERNAL

.42 CID

TOW

VALVE

4.5 GPM

BREATHER

A

(UPPER)

B

(LOWER)

GEAR PUMP

P1 P2

.95 CID

.34 CID

TESTER WITH

PRESSURE GUAGE

AND FLOW METER

1015 PSI

2.48 CID

HYDRAULIC LINE (REMOVED)

CAP

CAP

B

RH LH

A

A

11.96:1 11.96:1

WHEEL

B

MOTORS

2.48 CID

TRACTION (PISTON) PUMP

LH WHEEL MOTOR EFFICIENCY TEST

SUCTION

STRAINER

Figure 26

BREATHER

Multi Pro 5800Hydraulic System Page 5 − 32

Traction Circuit − Wheel Motor Efficiency Test

Over a period of time, a wheel motor can wear internally.
A worn motor may by−pass oil to its case drain causing
the motor to be less efficient. Eventually, enough oil loss
will cause the wheel motor to stall under heavy load con­ditions. Continued operation with a worn, inefficient mo ­tor can generate excessive heat, cause damage to
seals and other components in the hydraulic system and
affect overall machine performance.

IMPORTANT: If component failure is suspect, see
Traction Circuit Component Failure in the General
Information section of this chapter for information
regarding the importance of removing contamina­tion from the traction circuit before operating the
system.

1. Make sure hydraulic oil is at normal operating tem­perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.

2. Park machine on a level surface, stop engine, en­gage parking brake and remove key from the ignition
switch. After turning engine off, operate all hydraulic
controls to relieve hydraulic system pressure.

RH WHEEL MOTOR TEST

2

RIGHT

FRONT

FLOW

3

4

1

INSTALL

HYDRAULIC

TESTER HERE

3

Figure 27

1. RH wheel motor

2. Hydraulic tube

3. Cap (2)

4. Hydraulic hose

6. T o test right side (RH) wheel motor efficiency, isolate
the hydraulic motors and connect a hydraulic tester as
follows (Fig. 27):

CAUTION

Prevent personal injury and/or damage to equip­ment. Read all WARNINGS, CAUTIONS and Pre­cautions for Hydraulic Testing at the beginning
of this section.

3. Make sure that traction pedal is adjusted to the neu­tral position (see Adjust Traction Pedal for Neutral in this
Chapter).

4. Attach a heavy chain to the rear of the machine frame
and an immovable object to prevent the machine from
moving during testing.

5. Chock the wheels to prevent wheel rotation during
testing.

A. Thoroughly clean all fittings and hydraulic lines at
both wheel motors.

B. Disconnect both ends of the hydraulic tube
(item 2) and remove it from the machine.

C. Cap the open fittings (one at each of the wheel
motors).

D. Disconnect hydraulic hose from tee fitting at the
“A” port of the RH wheel motor.

IMPORTANT: Make sure that the oil flow indica­tor arrow on the flow meter is showing that the oil
will flow from the pump (hydraulic hose),
through the tester and into the tee fitting in the
RH wheel motor.

E. Install 15 GPM Hydraulic Tester #TOR214678
(pressure and flow) in series between the tee fitting
and the disconnected hose. Use hydraulic hose kit
(see Special Tools in this chapter) if necessary to
connect tester to machine. Make sure that flow con­trol valve on tester is fully open.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 33

7. To test left side (LH) wheel motor efficiency, isolate
the hydraulic motors and connect a hydraulic tester as
follows (Fig. 28):

A. Thoroughly clean all fittings and hydraulic lines at
both wheel motors.

B. Disconnect both ends of the hydraulic tube
(item 2) and remove it from the machine.

C. Disconnect hydraulic hose from tee fitting at the
“A” port of the RH wheel motor.

LH WHEEL MOTOR TEST

2

RIGHT

FRONT

FLOW

D. Cap both openings of the tee fitting at the RH
wheel motor.

IMPORTANT: Make sure that the oil flow indica­tor arrow on the flow meter is showing that the oil
will flow from the pump (hydraulic hose),
through the tester and into the tee fitting in the
RH wheel motor.

E. Install 15 GPM Hydraulic Tester #TOR214678
(pressure and flow) in series between the fitting at
the “B” port of the LH wheel motor and the discon­nected hydraulic hose. Use hydraulic hose kit (see
Special Tools in this chapter) if necessary to connect
tester to machine. Make sure that flow control valve
on tester is fully open.

8. Start engine and run at low idle speed. Check for any
hydraulic leakage from tester and hydraulic line connec­tions. Correct any leaks before proceeding.

9. Increase engine speed to high idle (Diesel Engine:

3050 to 3150 RPM, Gasoline Engine: 3200 RPM)
IMPORTANT: Monitor flow meter carefully during

test. Do not allow system flow to exceed 8 GPM (30
LPM).

3

INSTALL

HYDRAULIC

TESTER HERE

4

1

Figure 28

1. RH wheel motor

2. Hydraulic tube

3. Cap (2)

4. Hydraulic hose

13.If second wheel motor requires testing, perform test
procedure for the remaining motor.

14.When testing is complete, disconnect tester from
machine. Remove caps, plugs and/or fittings used dur­ing testing. Connect hydraulic fittings and lines to rear
wheel motor(s).

15.Start engine and run at low idle speed. Check for hy­draulic leakage and correct before returning machine to
service.

10.Have an assistant sit on seat, apply brakes fully and
slowly depress the traction pedal in the forward direction
until 1000 PSI (69 bar) is displayed on the tester pres­sure gauge.

11.Internal leakage for the wheel motor being tested will
be shown on the flow meter in GPM. Flow should be less
than 2.5 GPM (9.4 LPM) for the wheel motor being test­ed.

12.If specifications are not met, the wheel motor needs
to be inspected and repaired as necessary (see Wheel
Motors and Wheel Motor Service in this chapter).

Multi Pro 5800Hydraulic System Page 5 − 34

This page is intentionally blank.

System

Hydraulic

Multi Pro 5800 Hydraulic SystemPage 5 − 35

Traction Circuit − Traction (Piston) Pump Flow and Relief Pressure Test

FORWARD RELIEF

PRESSURE TEST SHOWN

1015 PSI

A

WHEEL

2.48 CID 2.48 CID
RH LH

B

B

MOTORS

11.96:1 11.96:1

A

50 PSI

4.5 GPM

GEAR PUMP

FILTER

CHARGE

P1 P2

INTERNAL

CHARGE PUMP

31.6 GPM

.34 CID

.95 CID

.42 CID

TESTER WITH

AND FLOW METER

PRESSURE GUAGE

A

(UPPER)

TOW

VALVE

4000 PSI

.032”

B

(LOWER)

4000 PSI

250 PSI

BREATHER

SUCTION

STRAINER

FORWARD

2.48 CID
.032” .032”

ENGINE

3100 RPM

RATED SPEED

Figure 29

REVERSE

TRACTION (PISTON) PUMP

Multi Pro 5800Hydraulic System Page 5 − 36