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IV-70
HYDRAULIC UNITS
CONTROL VALVE (SUB)
INSPECTION AND ADJUSTMENT
Checking the Parts
Parts
Judgment Criteria
Treatment
Solenoid coil
• When the solenoid is burned, short-circuited, or has a
wire break
• Wiring short-circuit or wire break
• Replace
• Replace
Body
• Scratches, rust, or corrosion at the sliding parts with the
spool
• Scratches, rust, or corrosion of the seal part in contact
with the O-ring
• Other damage considered to impair the normal func-
tions
• Replace
• Replace
• Replace
Spool, plunger
• Damage on the outer circumference which catches a
fingernail
• No smooth movement
• Replace
• Adjust or replace
Spring
• Rust, corrosion, deformation, breakage, or other notable
damage
• Replace
O-Ring
±±
• Replace
TROUBLESHOOTING
Symptom
Probable Causes
Remedy
Solenoid valve does not
operate.
• Wiring short-circuit or wire break
• Solenoid coil short-circuit or wire break
• Catching of foreign matter by the spool
• Damage on the outer circumference of the
spool
• Catching of foreign matter by the plunger
• Damage on the outer circumference of the
plunger
• Replace
• Replace
• Overhaul and repair or replace.
• Overhaul and repair or replace.
• Overhaul and repair or replace.
• Overhaul and repair or replace.
Oil leakage from so-
lenoid valve, cover, or
relief valve to the out-
side.
• Damaged O-ring
• Damaged O-ring at the emergency manual but-
ton of the solenoid valve
• Replace
• Replace
Pressure does not rise.
• Catching of foreign matter by the relief valve
• Clean or replace.
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...