wsm L503 - Page 441

8-S1
L3130 · L3430 · L3830 · L4630 · L5030, WSM
HYDRAULIC SYSTEM
1. TROUBLESHOOTING
W10143220
Symptom Probable Cause Solution
Reference
Page
Implement Does Not
Rise (Not Noise)
(Noise)
• Control linkage improperly adjusted
• Control linkage improperly assembled or
damaged
• Position control valve malfunctioning
• Relief valve spring weaken or broken
• Hydraulic piston O-ring, cylinder damaged
• Transmission fluid improper or insufficient
• Oil filter clogged
• Suction pipe loosen or broken
• Relief valve setting pressure too low
• Relief valve spring weaken or damaged
• Hydraulic pump malfunctioning
Adjust
Repair or replace
Repair or replace
Replace
Replace
Change or replenish
Replace
Repair or replace
Adjust
Replace
Repair pr replace
8-S12
–
8-S15 to
S17
8-S11
8-S19
G-7, 8
G-16
–
8-S11
8-S11
8-S7 to S10
Implement Does Not
Reach Maximum
Height
• Position control feedback rod improperly
adjusted
• Top link length improperly adjusted
• Hydraulic arm shaft, lift arm improperly
assembled
• 3 point link improperly set
Adjust
Adjust
Adjust
Adjust
8-S12
–
8-S20
–
Implement Does Not
Lower
• Position control valve malfunctioning
- Spool damaged
- Poppet 2, push rod improperly adjusted
Replace
Adjust
8-S17
8-S17
Implement Drops by
Weight
• Hydraulic cylinder worn or damaged
• Safety valve damaged
• Hydraulic piston and O-ring worn or damaged
• Lowering speed adjusting valve damaged
• Position control valve malfunctioning
- Poppet 2 seat surface damaged
- Poppet 2 seat sleeve O-ring damaged
Replace
Replace
Replace
Replace
Replace
Replace
8-S19
8-S16
8-S19
8-S15
8-S17
8-S17
Implement Hunts
(Moves Up and
Down)
• Position control valve malfunctioning
- Poppet 2 seat surface damaged
- Poppet 2 seat sleeve O-ring damaged
• Poppet 2, push rod improperly adjusted
Replace
Replace
Adjust
8-S17
8-S17
8-S17
Oil Temperature
Increases Rapidly
• Relief valve operating
- Relief valve malfunctioning
- Hydraulic line is clogged
• Hydraulic pump leak or damaged
• Oil leaks from valves
Adjust or replace
Clean or replace
Repair or replace
Repair or replace
8-S11
–
8-S7 to S10
–
KiSC issued 02, 2007 A