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IV-91
HYDRAULIC UNITS
SELF-LEVEL VALVE
TROUBLESHOOTING
Symptom
Probable Causes
Remedy
Arm delay at start of self-level
or unstable self-level.
• Air in system.
• Cycle Arm and bucket slowly to rid
system of air.
Loaded bucket dumps or un-
curls when control valve is in
neutral.
• Unloading spool is leaking.
• Remove and inspect unloading
spool for damage.
Insufficient self-level.
• Pin is out of adjustment.
• Broken unloading spool spring.
• Flow divider spool stuck towards
adjustment pin side.
• Re-adjust pin to achieve proper
flow split.
• Replace unloading spool spring.
• Remove flow divider spool and
check for damage.
Bucket dumps faster than Arm
raises. Too much self-level.
• Pin is out of adjustment.
• Flow divider spool is stuck towards
port B.
• Flow divider spool installed
wrong.
• Re-adjust pin to achieve proper
flow split.
• Remove flow divider spool and
inspect for damage.
• Remove spool and install with in-
ternal orifice towards port B.
With bucket dumped, Arm is
slow in starting to raise.
• Dampening orifice in the unloading
spool is plugged.
• Remove unloading spool and clean
dampening orifice.
Bucket does not move in self-
level.
• Pin is screwed in all the way.
• Dampening orifice in the unloading
spool is plugged.
• Ports A and B plumbed backwards.
• Re-adjust pin to achieve proper
flow split.
• Remove unloading spool and clean
dampening orifice.
• Reverse hoses to ports A and B.
Bucket Curls in self-level.
• Ports C and D plumbed back-
wards.
• Reverse hoses to ports C and D.
External leakage
• Damaged O-ring.
• Replace O-ring.
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...