Toro 22306, 22306G, 22307, 22321, 22321G Service Manual

Sitework Systems

Dingo TX420, TX425

Series

Service Manual

Form No. 492-9187

ABOUT THIS MANUAL

This service manual was written expressly for Toro service technicians. The Toro company has made every effort to
make the information in this manual complete and correct.

Basic shop safety knowledge and mechanical/electrical skills are assumed. The Table of Contents lists the systems
and the related topics covered in this manual.

For service information on drive systems, please refer to the Hydro-Gear BDP-10A/16A/21L Pump service manual
(form no. 492-4789), Hydro-Gear P Series Pump service manual (form no. BLN 52503) and Parker-Ross TF wheel
motor service manual (form no. 492-4753). For information specifi c to the engines used on this unit, refer to the
appropriate engine manufacturer’s service and repair instructions.

Units covered on in this manual are: TX420 model years 2000 - 2008
TX425 model years 2002 - 2008

The manual may also be specifi ed for use on later model products.
The hydraulic power system is precision machinery. Maintain strict cleanliness control during all stages of service

and repair. Cover or cap all hose ends and fi ttings whenever they are exposed. Even a small amount of dirt or other
contamination can severely damage the system.

We are hopeful that you will fi nd this manual a valuable addition to your service shop. If you have any questions or
comments regarding this manual, please contact us at the following address:

The Toro Company
LCB Technical Services
8111 Lyndale Avenue South
Bloomington, MN 55420

The Toro Company reserves the right to change product specifi cations or this manual without notice.

Copyright© All Rights Reserved

©2008 The Toro Company

Rev. 000

REVISIONS

8/01/08Revision 000 . . . . . . . . . . . . .

ii Rev. 000 Dingo TX420, TX425 Series Service Manual

TABLE OF CONTENTS

SAFETY INFORMATION

General Information ......................................................................................................................1-1

Think Safety First..........................................................................................................................1-1

SPECIFICATIONS

General Specifi cations..................................................................................................................2-1

Dimensions ...................................................................................................................................2-1

Periodic Maintenance Items .........................................................................................................2-2

Performance TX420 .....................................................................................................................2-2

Performance TX425 .....................................................................................................................2-2

Hydraulic System TX420 ..............................................................................................................2-3

Hydraulic System TX420 cont. .....................................................................................................2-4

Electrical System TX420 ..............................................................................................................2-4

Track System TX420 ....................................................................................................................2-4

Hydraulic System TX425 ..............................................................................................................2-5

Hydraulic System TX425 cont. .....................................................................................................2-6

Electrical System TX425 ..............................................................................................................2-6

Track System TX425 ....................................................................................................................2-6

Torque Specifi cations ...................................................................................................................2-7

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series) ..................................2-8

Standard Torque for Dry, Zinc and Steel Fasteners (Metric Series) ...........................................2-9

Other Torque Specifi cations .....................................................................................................2-10

Equivalents and Conversions ...................................................................................................2-11

U.S. to Metric Conversions .........................................................................................................2-12

MAINTENANCE

Recommended Maintenance Schedule........................................................................................3-1

Greasing the Traction Unit ............................................................................................................3-2

Maintaining the Road Wheels.......................................................................................................3-3

Hydraulic Reservoir Tank ..............................................................................................................3-4

Location .................................................................................................................................3-4

Checking the Hydraulic Fluid .................................................................................................3-4

Replacing the Hydraulic Filter.......................................................................................................3-5

Changing the Hydraulic Fluid .......................................................................................................3-6

Checking the Hydraulic Lines .......................................................................................................3-7

Vents - Hydraulic Tank ..................................................................................................................3-7

Engine Servicing...........................................................................................................................3-8

Air Filter ........................................................................................................................................3-9

Fuse Block ....................................................................................................................................3-9

Belt, Hydrostatic Pumps .............................................................................................................3-10

Track Inspection .........................................................................................................................3-10

Battery Maintenance...................................................................................................................3-11

T esting ........................................................................................................................................3-12

Special Tools ..............................................................................................................................3-12

iiiDingo TX420, TX425 Series Service Manual Rev. 000

TABLE OF CONTENTS

ENGINE (A)

TX420 & 425 250000399 & lower.............................................................................................. 4A-1

Engine Removal .................................................................................................................. 4A-1

TX420 & 425 250000399 & lower............................................................................................ 4A-13

Engine Installation ............................................................................................................. 4A-13

ENGINE (B)

TX420 & 425 250000401 & up .................................................................................................. 4B-1

Engine Removal .................................................................................................................. 4B-1

TX420 & 425 250000401 & up ................................................................................................ 4B-15

Engine Installation ............................................................................................................. 4B-15

EXHAUST

Crossover Manifold Replacement TX420 & 425 250000401 & up ...............................................5-1

Crossover Manifold Removal .................................................................................................5-1

Crossover Manifold Installation ..............................................................................................5-3

Muffl er Replacement TX420 & 425 250000401 & up ...................................................................5-5

Muffl er Removal .....................................................................................................................5-5

Muffl er Installation ..................................................................................................................5-7

ELECTRICAL

Relay ............................................................................................................................................6-1

Purpose ..................................................................................................................................6-1

Location .................................................................................................................................6-1

How It Works ..........................................................................................................................6-1

Testing ....................................................................................................................................6-2

Ignition Switch ..............................................................................................................................6-2

Purpose ..................................................................................................................................6-2

Location .................................................................................................................................6-2

How It Works ..........................................................................................................................6-2

Testing ....................................................................................................................................6-3

Auxiliary Neutral Switch ................................................................................................................6-3

Purpose ..................................................................................................................................6-3

Location .................................................................................................................................6-3

How It Works ..........................................................................................................................6-4

Testing ....................................................................................................................................6-4

Hour Meter/Tachometer ................................................................................................................6-4

Purpose ..................................................................................................................................6-4

Location .................................................................................................................................6-5

How It Works ..........................................................................................................................6-5

Testing ....................................................................................................................................6-6

Neutral Proximity (Magnetic) Switch.............................................................................................6-6

Purpose ..................................................................................................................................6-6

Location .................................................................................................................................6-6

How It Works ..........................................................................................................................6-6

Testing ....................................................................................................................................6-7

Light, Hydraulic Temperature ........................................................................................................6-7

Purpose ..................................................................................................................................6-7

Location .................................................................................................................................6-7

How It Works ..........................................................................................................................6-7

Testing ....................................................................................................................................6-8

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TABLE OF CONTENTS

ELECTRICAL cont.

Sensor, Hydraulic Temperature ....................................................................................................6-8

Purpose ..................................................................................................................................6-8

Location .................................................................................................................................6-8

How It Works ..........................................................................................................................6-9

Testing ....................................................................................................................................6-9

Alarm, Hydraulic Oil ......................................................................................................................6-9

Purpose ..................................................................................................................................6-9

Location .................................................................................................................................6-9

How It Works ..........................................................................................................................6-9

Testing ..................................................................................................................................6-10

Fuel Sender ................................................................................................................................6-10

Purpose ................................................................................................................................6-10

Location ...............................................................................................................................6-10

How It Works ........................................................................................................................6-10

Testing ..................................................................................................................................6-11

Fuel Gauge .................................................................................................................................6-11

Purpose ................................................................................................................................6-11

Location ...............................................................................................................................6-11

How It Works ........................................................................................................................6-11

Testing ..................................................................................................................................6-11

Fuses ..........................................................................................................................................6-12

Purpose ................................................................................................................................6-12

Location ...............................................................................................................................6-12

How It Works ........................................................................................................................6-12

Testing ..................................................................................................................................6-12

Hydraulic Oil Cooler Fan ............................................................................................................6-12

Purpose ................................................................................................................................6-12

Location ...............................................................................................................................6-12

How It Works ........................................................................................................................6-13

Testing ..................................................................................................................................6-13

Fusible Link ................................................................................................................................6-13

Purpose ................................................................................................................................6-13

Location ...............................................................................................................................6-13

How It Works ........................................................................................................................6-13

Testing ..................................................................................................................................6-14

Brake Switch...............................................................................................................................6-14

Purpose ................................................................................................................................6-14

Location ...............................................................................................................................6-14

How It Works ........................................................................................................................6-14

Testing ..................................................................................................................................6-14

Oil Sentry, Kohler Engine ...........................................................................................................6-15

Purpose ................................................................................................................................6-15

Location ...............................................................................................................................6-15

How It Works ........................................................................................................................6-15

Testing ..................................................................................................................................6-15

Fuel Solenoid, Kohler Engine .....................................................................................................6-16

Purpose ................................................................................................................................6-16

Location ...............................................................................................................................6-16

How It Works ........................................................................................................................6-16

Testing ..................................................................................................................................6-17

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TABLE OF CONTENTS

ELECTRICAL cont.

Diodes, Kohler Engine ................................................................................................................6-17

Purpose ................................................................................................................................6-17

Location ...............................................................................................................................6-17

How It Works ........................................................................................................................6-17

Testing ..................................................................................................................................6-18

Electrical Schematic TX420 Ser #200000100 - 200000999 .......................................................6-19

Electrical Schematic TX420 Ser #210000100 - 210000500 .......................................................6-20

Electrical Schematic TX420 Ser #210000501 - 220000400 .......................................................6-21

Electrical Schematic TX420 Ser #220000401 - 270000999 .......................................................6-22

Electrical Schematic TX420 Ser #280000100 - 280000999 .......................................................6-23

Electrical Schematic TX425 Ser #220000100 - 270000999 .......................................................6-24

Electrical Schematic TX425 Ser #280000100 - 280000999 .......................................................6-25

HYDRAULICS (A)

TX420 & 425 - All models, all years...........................................................................................7A-1

Auxiliary Valve Rebuild........................................................................................................ 7A-1

Auxiliary Valve .............................................................................................................. 7A-1

Auxiliary Valve Disassembly ......................................................................................... 7A-1

Relief Assembly .................................................................................................................. 7A-8

Spool Assembly .................................................................................................................. 7A-8

Auxiliary Valve Assembly .................................................................................................... 7A-8

Hydraulic Schematic TX420 200000100 - 210000500 ............................................................ 7A-16

Hydraulic Schematic TX420 210000501 - 240000300 / TX425 220000100 - 240000300 ...... 7A-17

Hydraulic Schematic TX420 240000301 - 280000999 / TX425 240000301 - 280000999 ...... 7A-18

HYDRAULICS (B)

TX420 & 425 240000299 & lower.............................................................................................. 7B-1

Hydraulic Tandem Pump Removal ...................................................................................... 7B-1

Rubber Coupler Assembly Removal ................................................................................... 7B-5

Rubber Coupler Assembly Installation ...............................................................................7B-11

Hydraulic Tandem Pump Installation ................................................................................. 7B-14

TX420 & 425 240000299 & lower............................................................................................ 7B-19

Hydraulic Tandem Pump Rebuild ...................................................................................... 7B-19

11 gpm Pump Assembly Rebuild ................................................................................ 7B-24

5 gpm Pump Assembly Rebuild .................................................................................. 7B-29

TX420 & 425 250000399 & lower............................................................................................ 7B-33

Tilt Cylinder Replacement ................................................................................................. 7B-33

TX420 & 425 230000599 & lower............................................................................................ 7B-37

Tilt Cylinder Assembly Rebuild .......................................................................................... 7B-37

Tilt Cylinder Disassembly ........................................................................................... 7B-39

Tilt Cylinder Assembly ................................................................................................ 7B-44

TX420 & 425 230000999 & lower............................................................................................ 7B-46

Lift Cylinder Replacement ................................................................................................. 7B-46

TX420 & 425 230000999 & lower............................................................................................ 7B-52

Lift Cylinder Rebuild .......................................................................................................... 7B-52

Lift Cylinder Disassembly ........................................................................................... 7B-54

Lift Cylinder Assembly ................................................................................................ 7B-59

TX420 & 425 240000299 & lower............................................................................................ 7B-61

Auxiliary Valve Removal.................................................................................................... 7B-61

Auxiliary Valve Installation................................................................................................. 7B-64

vi Rev. 000 Dingo TX420, TX425 Series Service Manual

TABLE OF CONTENTS

HYDRAULICS (B) cont.

TX420 & 425 240000299 & lower............................................................................................ 7B-67

2 Spool Loader Valve Removal ......................................................................................... 7B-67

2 Spool Loader Valve Installation ...................................................................................... 7B-70

TX420 & 425 240000300 & lower............................................................................................ 7B-72

Two Spool Loader Valve Rebuild ...................................................................................... 7B-72

Disassembly ............................................................................................................... 7B-73

Assembly .................................................................................................................... 7B-85

HYDRAULICS (C)

TX420 & 425 250000401 & up .................................................................................................. 7C-1

Hydraulic Tandem Pump Removal ...................................................................................... 7C-1

TX420 & 425 250000401 & up .................................................................................................. 7C-5

Rubber Coupler Assembly Removal ................................................................................... 7C-5

Rubber Coupler Assembly Installation .............................................................................. 7C-11

Hydraulic Tandem Pump Installation ................................................................................. 7C-15

TX420 & 425 240000301 & up ................................................................................................ 7C-20

Hydraulic Tandem Pump Rebuild ...................................................................................... 7C-20

5 gpm Pump Disassembly .......................................................................................... 7C-22

11 gpm Pump Disassembly ........................................................................................7C-23

11 gpm Pump Assembly Rebuild ................................................................................7C-26

5 gpm Pump Assembly Rebuild ..................................................................................7C-29

Pump Assembly ..........................................................................................................7C-32

TX420 & 425 250000401 & up ................................................................................................ 7C-34

Tilt Cylinder Replacement ................................................................................................. 7C-34

Tilt Cylinder Installation ..................................................................................................... 7C-37

TX420 & 425 230000601 & up ................................................................................................ 7C-39

Tilt Cylinder Assembly Rebuild .......................................................................................... 7C-39

Tilt Cylinder Disassembly ........................................................................................... 7C-41

Tilt Cylinder Assembly ................................................................................................7C-47

TX425 250000401 & up...........................................................................................................7C-49

Lift Cylinder Replacement ................................................................................................. 7C-49

TX420 & 425 240000001 & up ................................................................................................ 7C-55

Lift Cylinder Assembly Rebuild .........................................................................................7C-55

Lift Cylinder Disassembly ........................................................................................... 7C-57

Lift Cylinder Assembly ................................................................................................7C-62

TX420 & 425 240000301 & up ................................................................................................ 7C-64

Auxiliary Valve Removal....................................................................................................7C-64

Handle Removal ...............................................................................................................7C-67

Handle Installation ............................................................................................................7C-69

Safety Switch Removal .....................................................................................................7C-70

Safety Switch Installation ..................................................................................................7C-70

Auxiliary Valve Installation.................................................................................................7C-70

TX420 & 425 240000301 & up ................................................................................................ 7C-73

Loader Valve Removal ......................................................................................................7C-73

Loader Valve Installation ...................................................................................................7C-77

viiDingo TX420, TX425 Series Service Manual Rev. 000

TABLE OF CONTENTS

HYDRAULICS (C) cont.

TX420 & 425 240000301 & up ................................................................................................ 7C-80

Loader Valve Disassembly & Assembly ............................................................................7C-80

Joystick Assembly Removal ..............................................................................................7C-81

Joystick Assembly Installation ...........................................................................................7C-83

Spool Removal ..................................................................................................................7C-86

Spool Assembly ................................................................................................................7C-91

Main Relief Valve ..............................................................................................................7C-98

Work Port Relief .............................................................................................................. 7C-100

DRIVE SYSTEM

TX420 & 425 All Serial Numbers ..................................................................................................8-1

Drive Belt Removal ................................................................................................................8-1

Drive Belt Installation .............................................................................................................8-2

TX420 & 425 All Serial Numbers ..................................................................................................8-2

Lifting Unit for Service ............................................................................................................8-2

TX420 All Serial Numbers ............................................................................................................8-4

Track Removal .......................................................................................................................8-4

TX420 All Serial Numbers ............................................................................................................8-6

Tensioner Wheel Bearing Replacement .................................................................................8-6

Bearing Installation ................................................................................................................8-7

TX420 All Serial Numbers ............................................................................................................8-9

Track Guide Removal ............................................................................................................8-9

TX420 All Serial Numbers ..........................................................................................................8-10

Track Guide Installation .......................................................................................................8-10

TX420 All Serial Numbers ..........................................................................................................8-12

Track Installation ..................................................................................................................8-12

TX425 .........................................................................................................................................8-13

Track Removal .....................................................................................................................8-13

TX425 220000401 & higher........................................................................................................8-15

Track Guide Removal ..........................................................................................................8-15

TX425 220000401 & higher........................................................................................................8-16

Track Guide Installation .......................................................................................................8-16

TX425 .........................................................................................................................................8-19

Track Installation ..................................................................................................................8-19

TX420 240000100 & higher........................................................................................................8-21

TX425 240000300 & higher........................................................................................................8-21

Wheel Motor Removal .........................................................................................................8-21

Wheel Motor Installation ......................................................................................................8-25

TX425 220000001 - 220999999 .................................................................................................8-29

Track Removal .....................................................................................................................8-29

TX425 220000001 - 220999999 .................................................................................................8-31

Track Guide Removal ..........................................................................................................8-31

TX425 220000001 - 220999999 .................................................................................................8-32

Track Guide Installation .......................................................................................................8-32

TX425 220000001 - 220999999 .................................................................................................8-33

Tensioner Arm Bearing Replacement ..................................................................................8-33

TX425 220000001 - 220999999 .................................................................................................8-36

Tensioner Arm Bearing Installation ......................................................................................8-36

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TABLE OF CONTENTS

DRIVE SYSTEM cont.

TX420 200000100 - 230000999 .................................................................................................8-37

TX425 220000100 - 240000299 .................................................................................................8-37

Wheel Motor Removal .........................................................................................................8-37

Wheel Motor Installation ......................................................................................................8-41

Drive Sprocket Rebuild ...............................................................................................................8-46

Track Installation ..................................................................................................................8-49

TX420 & 425 All Serial Numbers ................................................................................................8-53

Idler Arm Assembly Removal ...............................................................................................8-53

TX420 & 425 All Serial Numbers ................................................................................................8-55

Idler Arm Assembly Installation ............................................................................................8-55

TX420 & 425 230000999 & lower...............................................................................................8-57

Traction Control Handle Assembly Removal ........................................................................8-57

Traction Control Handle Assembly Installation .....................................................................8-59

TX420 & 425 240000301 & up ...................................................................................................8-61

Hydrostatic Pump Removal (Right Side) .............................................................................8-61

Removal of Rear Panels ......................................................................................................8-62

Marking the Right Hand Hydrostatic Pump Lines ................................................................8-65

Hydrostatic Pump Installation (Right Side) ..........................................................................8-69

Hydrostatic Pump Removal (Left Side) ................................................................................8-74

Removal of Rear Panels ......................................................................................................8-74

Marking the Left Hand Hydrostatic Pump Lines ...................................................................8-77

Hydrostatic Pump Installation (Left Side) .............................................................................8-82

TX420 & 425 240000300 & lower...............................................................................................8-88

Hydrostatic Pump (Left Side) Removal ................................................................................8-88

Hydrostatic Pump (Left Side) Installation .............................................................................8-93

Hydrostatic Pump (Right Side) Removal .............................................................................8-99

Hydrostatic Pump (Right Side) Installation ........................................................................8-104

Road Wheel Bearing Replacement ..........................................................................................8-109

Road Wheel Bearing and Road Wheel Assembly Installation ........................................... 8-111

Track Guide Alignment .............................................................................................................8-113

TX420 ................................................................................................................................8-113

TX425 ................................................................................................................................8-115

BRAKE ASSEMBL Y

TX420 & 425 250000399 & lower.................................................................................................9-1

Brake Assembly Removal ......................................................................................................9-1

Brake Assembly Installation ...................................................................................................9-4

TX420 & 425 250000399 & lower.................................................................................................9-7

Brake Cable Removal (Left Side Cable) ................................................................................9-7

TX420 & 425 250000399 & lower...............................................................................................9-11

Brake Cable Installation (Left Brake Cable) .........................................................................9-11

TX420 & 425 250000399 & lower...............................................................................................9-18

Brake Cable Removal (Right Side Cable) ............................................................................9-18

TX420 & 425 250000399 & lower...............................................................................................9-21

Brake Cable Installation (Right Side Cable) .........................................................................9-21

TX420 & 425 250000401 - 270000999 ......................................................................................9-26

Brake Cable Assembly Removal ..........................................................................................9-26

Brake Cable Replacement ...................................................................................................9-30

Brake Cable Assembly Installation .......................................................................................9-33

ixDingo TX420, TX425 Series Service Manual Rev. 000

TABLE OF CONTENTS

BRAKE ASSEMBL Y cont.

TX420 & 425 250000401 - 270000999 ......................................................................................9-38

Brake Plate Removal ...........................................................................................................9-38

TX420 & 425 250000401 - 270000999 ......................................................................................9-40

Brake Plate Installation ........................................................................................................9-40

TX420 & 425 2008 Models .........................................................................................................9-43

Brake Assembly Removal ....................................................................................................9-43

Brake Cable Replacement..........................................................................................................9-47

Brake Assembly Installation .................................................................................................9-49

Brake Plate Replacement ...........................................................................................................9-53

Brake Plate Removal ...........................................................................................................9-53

Brake Plate Installation ........................................................................................................9-54

Brake Handle Spring Bracket Assembly Replacement...............................................................9-55

Brake Handle Spring Bracket Assembly Removal ...............................................................9-55

Brake Handle Spring Bracket Assembly Installation ............................................................9-58

LOADER ARM

TX420 & 425 240000299 & lower...............................................................................................10-1

Loader Arm Assembly Removal ...........................................................................................10-1

Loader Arm Bushing Replacement ......................................................................................10-7

TX420 & 425 240000299 & lower...............................................................................................10-8

Loader Arm Assembly Installation ........................................................................................10-8

CHASSIS

TX420 & 425 250000401 & up ...................................................................................................11-1

Fan Replacement .................................................................................................................11-1

Fan Installation .....................................................................................................................11-2

TX420 & 425 250000401 & up ...................................................................................................11-5

Hood Replacement ..............................................................................................................11-5

Replacement Hood Installation ............................................................................................11-9

TX420 & 425 250000401 & up .................................................................................................11-14

Rear End Disassembly ......................................................................................................11-14

Rear End Assembly ...........................................................................................................11-15

HYDRAULIC TESTING

TX420 & 425...............................................................................................................................12-1

Introduction ..........................................................................................................................12-1

Flow Testing .................................................................................................................. .......12-1

Hydraulic Testing ........................................................................................................................12-3

Hydrostatic Testing Procedures ..................................................................................................12-3

Auxiliary Circuit Pressure Test .............................................................................................12-4

Auxiliary Circuit Pressure Test Procedures ..........................................................................12-4

Auxiliary Circuit Flow Test ....................................................................................................12-7

Auxiliary Circuit Flow Test Procedures .................................................................................12-7

Flow Test Gear Pump to Loader Valve .................................................................................12-8

Flow Test Gear Pump to Loader Valve Procedures .............................................................12-8

TX420 & 425 210000501 & up .................................................................................................12-10

Loader Circuit Pressure Test ..............................................................................................12-10

Loader Circuit Pressure Test Procedures ..........................................................................12-11

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TABLE OF CONTENTS

HYDRAULIC TESTING cont.

TX420 200000100 - 210000499 ...............................................................................................12-13

Loader Circuit Pressure Test ..............................................................................................12-13

Loader Circuit Pressure Test Procedures ..........................................................................12-14

Hydrostatic Pump Flow Test...............................................................................................12-17

Hydrostatic Pump Flow Test Procedures ...........................................................................12-17

Left Drive System Flow Test...............................................................................................12-18

Right Drive System Flow Test ............................................................................................12-21

TX420 & 425.............................................................................................................................12-25

Traction Control Tracking Adjustment, Full Forward Position ............................................12-25

TX420 & 425.............................................................................................................................12-26

Traction Control Neutral Adjustment ..................................................................................12-26

TX420 & 425.............................................................................................................................12-27

Purging Air Procedures ......................................................................................................12-27

TOWER

TX420 & 425 240000301 & up ...................................................................................................13-1

Control Panel and Tower Assembly Replacement ......................................................................13-1

Raising the Loader Arms ......................................................................................................13-1

Battery Removal ..................................................................................................................13-1

Engine Hood Assembly Removal .........................................................................................13-2

Belt Removal ........................................................................................................................13-3

Gauge/Electrical Removal ...................................................................................................13-4

Control Panel Removal ........................................................................................................13-7

Loader Arm Removal .........................................................................................................13-31

Tower Removal ..................................................................................................................13-33

Replacement Control Panel Installation .............................................................................13-49

Wire Harness Reinstallation ...............................................................................................13-53

Loader Arm Assembly Installation ......................................................................................13-62

Hood Assembly Installation ................................................................................................13-67

Final Checks and Rear Panel Installation ..........................................................................13-68

TX420 & 425 240000300 & up .................................................................................................13-71

Control Panel and Tower Assembly Replacement ....................................................................13-71

Control Panel Removal ......................................................................................................13-74

Engine Hood Assembly Removal .......................................................................................13-95

Gauge/Electrical Removal .................................................................................................13-96

Belt Removal ....................................................................................................................13-100

Loader Arm Removal .......................................................................................................13-101

Tower Replacement ................................................................................................................13-103

Tower Installation .............................................................................................................13-119

Replacement Control Panel Installation ...........................................................................13-120

Wire Harness Installation .................................................................................................13-125

Loader Arm Assembly Installation ....................................................................................13-135

Hood Assembly Installation ..............................................................................................13-140

Final Checks & Rear Panel Installation ............................................................................13-141

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TABLE OF CONTENTS

MAIN FRAME

TX420 & 425 250000401 & up ...................................................................................................14-1

Main Frame Replacement ..........................................................................................................14-1

Track Removal TX425 .........................................................................................................14-1

T ensioner Arm Removal .......................................................................................................14-3

Track Guide Removal ..........................................................................................................14-3

Drive Wheel Removal ..........................................................................................................14-4

Loader Arm Assembly Removal ...........................................................................................14-4

T ower Assembly Removal ..................................................................................................14-13

Engine Removal .................................................................................................................14-22

Brake Assembly Removal ..................................................................................................14-27

Wheel Motor Removal .......................................................................................................14-28

Transfer Fittings to New Frame ..........................................................................................14-29

TX420 210000999 & lower .......................................................................................................14-31

Hydraulic Tank Removal/Installation ..................................................................................14-31

Wheel Motor Installation ....................................................................................................14-32

Brake Assembly Installation ...............................................................................................14-33

Engine Installation ..............................................................................................................14-34

Tower Reinstallation ...........................................................................................................14-38

Loader Arm Assembly Installation ......................................................................................14-47

Drive Wheel Installation .....................................................................................................14-58

Track Guide Installation .....................................................................................................14-59

T ensioner Arm Installation ..................................................................................................14-60

Final Machine Adjustments ................................................................................................14-64

xii Rev. 000 Dingo TX420, TX425 Series Service Manual