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Troubleshooting Guide
9. Troubleshooting Guide
If a problem is encountered that is difficult to solve, even after
having read through this troubleshooting section, contact your
local dealer, distributor or Wallenstein Equipment. Know your
machine serial number. See Serial Number Location on page
5.
Problem
Cylinder rods do not move or move
slowly.
Cylinder movements jerky.
Control handle does not go to neutral
when released.
Hydraulic hose leaking.
Cylinder leaking oil.
Hydraulic system behaving erratically.
Boom drifts down.
Boom does not swing or swings slowly.
Cause
No pressurized hydraulic oil.
Pressure and return hoses to backhoe are
reversed.
Not enough oil flow.
Stuck / damaged / mismatched couplers.
Check valve stuck.
Engine speed too slow.
Hydraulic system leak. Air in hydraulic system.
Return springs collapsed.
Control valve may be damaged.
Hose worn or damaged.
Loose hose connection. Adapters or hose ends
damaged.
Seals worn.
Mismatched control valve. Valve type must
be same as tractor hydraulic circuit (open or
closed center).
Seals leaking (bypassing).
Counterbalance valve defective.
Boom swing lock pin in place.
No oil pressure.
Oil flow too low.
Engine speed too low.
40
Solution
Oil filter plugged. Change filter.
Low hydraulic oil level. Add oil to reservoir.
Change hose connections.
Flow control set too low. Adjust for more flow.
Clean or replace couplers. Make sure mating
couplers are same style.
Clean or replace.
Increase engine speed to correct rpm.
Tighten all hydraulic connections. Cycle cylinders
to remove air.
Check and replace if required.
Call technician. Valve may need to be serviced or
replaced.
Replace hose. Check hose routing to avoid
chafing or rubbing.
Tighten or replace if damaged.
Call technician. Seal replacement may be required.
Determine if hydraulic system on tractor is open
or closed center. Make sure is same.
Replace seals.
Repair or replace.
Remove boom lock pins before starting work.
Oil filter plugged. Change filter.
Low hydraulic oil level. Add oil to reservoir.
Flow control set too low. Adjust control to
increase flow.
Increase speed to correct rpm.
GE, GX Series
Backhoe
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