Operation Manual

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