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V-18
TROUBLESHOOTING
LIFT ARMS
LIFT ARM CYLINDERS FAIL TO MOVE.
Inspect movement of
the spool.
3
Inspect the pilot valve.
2
Inspect the operation of
actuators other than the
lift arm cylinders.
1
Inspect the lift arm cyl-
inders.
6
Inspect the arm float
solenoid valve.
5
Repair or replace control
valve.
Normal
Normal
Faulty
Perform
replacement
test for the port relief
valves.
4
Repair or replace arm float
solenoid valve.
Repair or replace lift arm
cylinder.
Normal
Faulty
Repair or replace port relief
valve.
No change
Operation be-
came normal.
Problem lies with port
relief valve.
Repair or replace pilot
valve.
Normal
Faulty
1. Inspect the operation of actuators other
than the lift arm cylinders.
Check the table at right to see if the problem
lies with the lift arms alone. If the problem does
lie with the lift arms, then check the main relief
valve and the hydraulic pump (P3).
“V-9”
2. Inspect the pilot valve.
a. Disconnect the hose running from the pilot
valve to the control valve (lift arm section) at
the control valve.
b. Fit a pressure gauge to the hose.
c. Engage the lever to operate the lift arms and
measure the pressure.
• The lift arms are working properly if pressure
varies from 0 to 3.1 MPa in accordance with
movement of the angle of the control lever.
Lever Operated
Places Inspected
Bucket
Relief Valve R3
Pump P3
T7E007
Pb1
Pa1
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...