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BX25,
RCK54(P)-23BX,
RCK60B-23BX,
LA240,
BT601,
WSM
BACKHOE
2.
TROUBLESHOOTING
Symptom
i
Probable
Cause
Solution
Reference
Page
All
Functions
Inoperative
(Front
Loader
Is
OK)
Quick coupler disconnected Reconnect -
All
Functions
Including
Front
Loader,
Are
Inoperative
Insufficient transmission fluid Replenish 9-S2
Relief valve spring damaged Replace 5-S4
Hydraulic pump malfunctioning Repair or replace 5-S12
Oil filter clogged Replace G-13
Hydraulic
Oil
Overheats
Continuous operation against relief Operate properly -
Transmission fluid improper brand and viscosity Use proper fluid G-7
Relief valve mis-adjusted Readjust 5-S4
Insufficient transmission fluid Replenish 9-S2
Oil filter clogged Replace G-13
Individual
Cylinder
Circuit
Weak
or
Inoperative
(Others
OK)
Valve spool not moving fully Adjust linkage -
Valve spool stick (especially when warm) Repair or replace I 9-S16
Overload relief valve mis-adjusted Readjust -
Piston seal ring worn or damaged Replace 9-S19
Cylinder tube worn or damaged Replace 9-S18
Oil leaks from joint Repair
or
replace -
Hydraulic hose damaged Replace
Dust
in
overload relief valve Flush hydraulic line
Excessive
Cylinder
Movement
Piston seal ring worn
or
damage Replace 9-S19
Excessive valve spool to bore tolerance Replace 9-S16
Hydraulic hose
or
fitting damaged Replace -
Hydraulic hose or fitting loose Retighten -
Cylinder tube worn
or
damaged i Replace 9-S19
Insufficient
Cylinder
Speed Engine rpm too low Adjust rpm -
Hydraulic pump malfunctioning Repair or replace 5-S12
Relief valve pressure too low Readjust 5-S4
Insufficient transmission fluid Replenish 9-S2
W1014322
9-S4
428


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