viiTX525 Service Manual Rev. 000
TABLE OF CONTENTS
HYDRAULIC SYSTEM
2 Spool Loader Valve Replacement .............................................................................................6-1
2 Spool Loader Valve Removal ..............................................................................................6-1
2 Spool Loader Valve Installation ...........................................................................................6-5
Auxiliary Valve Replacement ........................................................................................................6-9
Auxiliary Valve Removal.........................................................................................................6-9
Auxiliary Valve Installation....................................................................................................6-14
Tandem Pump / Engine Coupling Assembly Replacement ........................................................6-19
Coupling Removal ................................................................................................................6-19
Coupling Installation .............................................................................................................6-20
Hydraulic Oil Filter Head Replacement ......................................................................................6-22
Hydraulic Oil Filter Head Removal .......................................................................................6-22
Hydraulic Oil Filter Head Installation ....................................................................................6-25
Hydraulic Tandem Pump Replacement ......................................................................................6-30
Hydraulic Tandem Pump Removal .......................................................................................6-30
Hydraulic Tandem Pump Installation ....................................................................................6-37
Hydraulic Tandem Pump Rebuild ...............................................................................................6-42
6 gpm Pump Disassembly ...................................................................................................6-44
14 gpm Pump Disassembly .................................................................................................6-45
14 gpm Pump Assembly ......................................................................................................6-48
6 gpm Pump Assembly ........................................................................................................6-51
Hydraulic Tandem Pump Assembly......................................................................................6-54
Auxiliary Valve Rebuild ...............................................................................................................6-57
Auxiliary Valve ......................................................................................................................6-57
Relief Assembly ...................................................................................................................6-64
Spool Assembly ...................................................................................................................6-64
Auxiliary Valve Assembly .....................................................................................................6-64
Loader Valve Rebuild .................................................................................................................6-72
Joystick Assembly Installation ..............................................................................................6-74
Spool Removal .....................................................................................................................6-77
Spool Assembly ...................................................................................................................6-83
Main Relief Valve .................................................................................................................6-90
Work Port Relief ...................................................................................................................6-92
Lift Cylinder Assembly Rebuild ...................................................................................................6-94
Lift Cylinder Disassembly .....................................................................................................6-96
Lift Cylinder Assembly ........................................................................................................6-101
Tilt Cylinder Assembly Rebuild .................................................................................................6-103
Tilt Cylinder Disassembly ...................................................................................................6-106
Tilt Cylinder Assembly ........................................................................................................ 6-112
DRIVE SYSTEM
Lifting the Machine for Service .....................................................................................................7-1
Track Guide Alignment .................................................................................................................7-3
Belt Replacement .........................................................................................................................7-5
Belt Removal ..........................................................................................................................7-5
Belt Installation .......................................................................................................................7-8
Idler Arm Replacement ...............................................................................................................7-12
Idler Arm Removal ...............................................................................................................7-12
Idler Arm Assembly Installation ............................................................................................7-15
Right Hydrostatic Pump Replacement........................................................................................7-18
Right Hydrostatic Pump Removal ........................................................................................7-18
Right Hydrostatic Pump Installation .....................................................................................7-29