Allmand Brothers Allmand 8.5 10 FT BACKHOE - Manual (Page 38)

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PROBLEM POSSIBLE CAUSE REMEDY
External leakage Control valve tie bolts Torque bolts to
loose 20 ft.lbs.
Damaged O-rings Repair control valve
between valve sections
Damaged O-rings on Repair control valve
valve spools
Cylinder seals damaged Repair cylinder
Damaged O-rings on Repair control valve
valve drop check
Broken oil lines Replace hose and
check for leaks
Swing cylinder Oil leaking past pack- Replace packing or
malfunctioning ing or seals seals
Faulty relief valve Clean or replace
Control valve sticking or Dirty valve Clean valve
working hard
Scored bore or bent Replace valve section
spool
Control linkage mis- Correct misalignment
aligned
Control valve tie bolts Tighten bolts only to
too tight 20 ft.lbs.
Return spring binding Replace spring
or broken
Foreign matter in spool Clean valve
bore
TROUBLESHOOTING
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