IV-24
HYDRAULIC UNITS
HST PUMP
Valves
1. Replace the charge check and high pressure re-
lief valve.
a. Install outer O-ring, backup ring, and inner
O-ring on each valve seat plug.
b. Check that the conical springs (3) are prop-
erly retained on the check poppets or relief
valves. Install the check poppet or high pres-
sure relief valve assemblies (2) into the pump
housing.
• The conical springs MUST be correctly
positioned on the check poppets or relief
valves after installation for proper pump
operation.
c. Install the valve seat plugs or valve seat /
bypass plugs (1) into the pump housing and
torque.
Plug: 40~95 N·m
2. Replace the charge relief valve.
a. Install the O-ring on the valve plug. Reinstall
the poppet (8) and spring (7). Reinstall the
plug (6) with its lock nut (5), aligning the
marks made at disassembly.
Lock Nut: 47~57 N·m
Summary of Contents for TL150
Page 1: ...TL150 Track Loader BOOK No CT7E901 WORKSHOP MANUAL Serial No 21500004...
Page 4: ...0 4...
Page 5: ...I 1 I GENERAL...
Page 18: ...I 14 GENERAL...
Page 19: ...II 1 II SPECIFICATIONS...
Page 44: ...III 1 III MACHINE CONFIGURATION...
Page 94: ...III 51 MACHINE CONFIGURATION ELECTRICAL SYSTEM ELECTRICAL SYSTEM ELECTRICAL WIRING DIAGRAM...
Page 122: ...III 79...
Page 146: ...MACHINE CONFIGURATION III 103...
Page 147: ...IV 1 IV HYDRAULIC UNITS...
Page 152: ...IV 6 HYDRAULIC UNITS HST PUMP 1 Plug 2 Plug 3 Plug 4 Screw 5 Seal Nut 6 Plug Pump Assembly 4 4...
Page 189: ...IV 43 HYDRAULIC UNITS GEAR PUMP INSPECTION AND ADJUSTMENT IV 36 38 TROUBLESHOOTING IV 39...
Page 230: ...IV 84 HYDRAULIC UNITS PILOT VALVE INSPECTION AND ADJUSTMENT IV 79 TROUBLESHOOTING IV 80...
Page 261: ...IV 115 HYDRAULIC UNITS TRAVEL MOTOR DISASSEMBLY AND ASSEMBLY Special tools...
Page 263: ...IV 117 HYDRAULIC UNITS TRAVEL MOTOR...
Page 282: ...IV 136 HYDRAULIC UNITS TRAVEL MOTOR...
Page 283: ...V 1 V TROUBLESHOOTING...