|
Reservoir Drains When Changing Hydraulic Filter
|
Oil cooler return tube vent hole in reservoir may be plugged
|
See your authorized dealer.
|
|
|
Vent tube broken off inside reservoir
|
See your authorized dealer.
|
|
|
Cooler flow check valve stuck open
|
See your authorized dealer.
|
|
No Hydraulics
|
Low oil level
|
Add oil to correct level.
|
|
|
Failed pump drive shaft
|
See your authorized dealer.
|
|
|
Pump problem
|
See your authorized dealer.
|
|
|
Load sense shuttle check valve
|
See your authorized dealer.
|
|
|
Obstruction in oil lines or valves
|
See your authorized dealer.
|
|
Low Loader Hydraulic Power
|
Incorrect loader load sense relief pressure setting
|
See your authorized dealer.
|
|
|
Incorrect flow limiter setting
|
See your authorized dealer.
|
|
Low Backhoe Hydraulic Power
|
Incorrect backhoe load sense relief setting
|
See your authorized dealer.
|
|
|
Incorrect flow limiter setting
|
See your authorized dealer.
|
|
Low Hydraulic Power
|
Hydraulic oil aerated
|
Incorrect oil, drain and refill. Suction hose has air leak. Inspect and tighten. See repair manual.
|
|
|
Leakage within work circuit
|
See your authorized dealer.
|
|
|
Low oil level
|
Check oil levels.
|
|
|
Incorrect flow limiter setting
|
See your authorized dealer.
|
|
|
Incorrect relief pressure setting
|
See your authorized dealer.
|
| Symptom |
Problem |
Solution |
|
Slow Steering Hydraulics
|
Pressure regulating valve
|
See your authorized dealer.
|
|
|
Worn steering valve
|
See your authorized dealer.
|
|
|
Steering valve leakage
|
See your authorized dealer.
|
|
|
Steering cylinder leakage
|
See your authorized dealer.
|
|
|
Steering linkage
|
See your authorized dealer.
|
|
No Steering Hydraulics (Loader Hydraulics OK)
|
Pressure regulating valve
|
See your authorized dealer.
|
|
|
Worn steering pressure regulating valve
|
See your authorized dealer.
|
|
|
Obstruction in steering load sense hose
|
See your authorized dealer.
|
|
Machine Transport Speed is Slow
|
Engine or transmission problem
|
See your authorized dealer.
|
|
Engine Pulls Down Excessively During Loader Operation
|
Relief pressure setting too high
|
See your authorized dealer.
|
|
|
Engine not operating to specifications
|
See your authorized dealer.
|
|
|
Pump flow limiter set too high
|
See your authorized dealer.
|
|
Engine Pulls Down Excessively During Backhoe Operation
|
Relief pressure setting too high
|
See your authorized dealer.
|
|
|
Pump flow limiter setting too high
|
See your authorized dealer.
|
|
Slow Backhoe Hydraulics-Loader OK.
|
Control valve worn
|
See your authorized dealer.
|
|
|
Backhoe valve isolator stuck
|
See your authorized dealer.
|
|
|
Load sense relief set too low
|
See your authorized dealer.
|
|
|
Flow limiter setting too low
|
See your authorized dealer.
|
| Symptom |
Problem |
Solution |
|
Slow Loader Hydraulics-Backhoe OK.
|
Control valve worn
|
See your authorized dealer.
|
|
|
Loader valve isolator stuck
|
See your authorized dealer.
|
|
|
Load sense relief set too low
|
See your authorized dealer.
|
|
|
Flow limiter setting too low
|
See your authorized dealer.
|
|
Slow Hydraulic Functions
|
Low pump flow
|
See your authorized dealer.
|
|
|
Relief valve leaking
|
See your authorized dealer.
|
|
|
Isolator valve stuck
|
See your authorized dealer.
|
|
|
Low oil level
|
Add oil to correct level.
|
|
|
Engine rpm too low
|
Increase rpm or check engine speed. See your authorized dealer.
|
|
|
Hydraulic oil aerated
|
Incorrect oil, drain and refill. Suction hose has air leak. Inspect and tighten. See Technical Repair manual.
|
|
|
Low load sense differential pressure
|
See your authorized dealer.
|
|
|
Hose or line leakage
|
Inspect and tighten fittings.
|
| Symptom |
Problem |
Solution |
|
Loader Or Backhoe Operates Slowly In One Function
|
Control valve section problem
|
See your authorized dealer.
|
|
|
Control lever and linkage out of adjustment
|
See your authorized dealer.
|
|
|
Circuit relief valve or plug leakage in control valve
|
See your authorized dealer.
|
|
|
|
See your authorized dealer.
|
|
|
Compensator spool stuck
|
See your authorized dealer.
|
|
|
Hydraulic cylinder leakage
|
See your authorized dealer.
|
|
|
Bent or restricted line
|
See your authorized dealer.
|
|
|
Hydraulic control valve not operating properly
|
See your authorized dealer.
|
|
|
Bent cylinder rod
|
See your authorized dealer.
|
|
No Loader Or Backhoe Power In One Function
|
Control lever and linkage out of adjustment
|
See your authorized dealer.
|
|
|
Circuit relief valve or plug leakage in control valve
|
See your authorized dealer.
|
|
|
Bent or restricted line
|
See your authorized dealer.
|
|
|
Hydraulic control valve not operating properly
|
See your authorized dealer.
|
|
|
Compensator stuck
|
See your authorized dealer.
|
| Symptom |
Problem |
Solution |
|
Low Hydraulic Power (Low Hydraulic Pressure)
|
Low oil level (aeration of oil)
|
Add oil to correct level.
|
|
|
Load sense shuttle check valve stuck
|
See your authorized dealer.
|
|
|
Hydraulic oil aerated
|
Incorrect oil, drain and refill. Suction hose has air leak. Inspect and tighten. See repair manual.
|
|
|
Incorrect relief valve setting
|
See your authorized dealer.
|
|
|
Leakage within work circuit
|
See your authorized dealer.
|
|
|
Excessive leakage in hydraulic system
|
See your authorized dealer.
|
|
Hydraulic Function Makes "Chattering" Noise
|
Low oil level
|
Add oil to correct level.
|
|
|
Hydraulic oil aerated
|
Incorrect oil, drain and refill. Suction hose has air leak. Inspect and tighten. See repair manual.
|
|
|
Worn or wrong circuit relief valve installed in backhoe valve.
|
See your authorized dealer.
|
|
Functions Drift
|
Oil leaking past valve port
|
See your authorized dealer.
|
|
|
Oil leaking past cylinders or valve
|
See your authorized dealer.
|
|
|
Anti-drift check valve not functioning
|
See your authorized dealer.
|
|
Control Valve Lever Sticks Or Works Hard
|
Control valve lever linkage binding
|
Inspect and adjust linkage. See repair manual.
|
|
|
Hydraulic system overheating
|
See your authorized dealer.
|
|
|
Return spring rubbing on spring cap
|
See your authorized dealer.
|
|
|
Broken return spring
|
See your authorized dealer.
|
|
|
Contamination in control valve
|
See your authorized dealer.
|
|
|
Scored valve bore or bent spool
|
See your authorized dealer.
|
| Symptom |
Problem |
Solution |
|
Hydraulic Oil Overheats
|
Excessive load
|
Reduce load.
|
|
|
Operator holding hydraulic system over relief
|
Return levers to neutral when not in use.
|
|
|
Oil levels too low in reservoir
|
Check levels and add oil. Use recommended oil . See Fuels and Lubricants chapter in this manual.
|
|
|
Using low viscosity oil in hot weather
|
Use recommended oil. See Fuels and Lubricants chapter in this manual.
|
|
|
Hydraulic cooling system restricted
|
See your authorized dealer.
|
|
|
Temperature sender not working
|
See your authorized dealer.
|
|
|
Incorrect relief valve pressure
|
See your authorized dealer.
|
|
|
Excessive leakage in the hydraulic system
|
See your authorized dealer.
|
|
Foaming Oil
|
Oil level too low or too high
|
Check oil level. Adjust to full mark on sight gauge.
|
|
|
Incorrect type of oil
|
Drain and replace. See Fuels and Lubricants chapter in this manual.
|
|
|
Air leak on suction side of pump
|
See your authorized dealer.
|
|
Hydraulic Pump Leaking
|
Cap screws that hold pump together are loose
|
See your authorized dealer.
|
|
|
Worn shaft seal
|
See your authorized dealer.
|
|
|
Hydraulic oil overheating
|
See your authorized dealer.
|
| Symptom |
Problem |
Solution |
|
Excessive Pump Noise
|
Low oil level
|
Add oil to correct level.
|
|
|
Hydraulic filter bypass valve chattering
|
Replace filter. Inspect, clean, and repair. See Technical Repair manual.
|
|
|
Worn pump drive
|
See your authorized dealer.
|
|
|
Oil lines in contact with operators station (Worn cab, transmission, or canopy rubber isolators)
|
See your authorized dealer.
|
|
|
Pump attaching hardware loose
|
See your authorized dealer.
|
|
|
Leakage in hydraulic circuit
|
See your authorized dealer.
|