Troubleshooting Guide - Alamo PA92 Operator's Manual

15. TROUBLESHOOTING GUIDE

TROUBLE
Hydraulic Cylinder
Not Working
Hydraulic Motor
Not Working
Hydraulic System Failure
Structural Members
Failure
Excessive Vibrations
PA92 04/09
© 2009 Alamo Group Inc.
OPERATION
POSSIBLE CAUSE
Hydraulic level low.
Pump not functioning
properly.
Cylinder not functioning
properly.
Cylinder has a scored wall,
allow oil to flow around
piston.
Kinks or pinched points
on the line.
Motor "bogging down"
under load.
Malfunction in hydraulic
valve section.
Rough treatment.
Check Gear box bolts.
Check For loose nuts on
bladeholder and blades
Check for bent output shaft.
If shaft is bent oil will normally
leak from the bottom seal.
Check to see if blades are
free swinging.
Check for even wear on each
blade tip. Were both blades
changed at the same time?
Operation Section 4-50
POSSIBLE REMEDY
Check hydraulic fluid level.
(See sight gauge on tank)
Attempt to use another cylinder or
pressure gauge.
Check line for stoppage.
Replace the cylinder.
Check line for kinks or
pinched places.
Recheck relief valve setting
on the cutter valve - 2500 PSI.
Check entire system before valve is
replaced; may require replacement
of hydraulic valve section, but not of
the valve bank. Service relief valves
and detents individually.
Use only on elements it is designed
to cut such as grass, weeds, brush,
trees.
Tighten if loose.
Tighten If loose
Replace shaft if bent.
Free blades so they swing
Weigh blades. Weight should be
within 1 oz. Always replace
both blades.