SECTION II
TESTING AND TROUBLESHOOTING
Table 2-1. Troubleshooting Guide
Page 2-14Printed in U.S.A.
Problem Symptom Probable Cause Check Correction
When ENABLE and
UNLOCK buttons on hand
control are pressed, floor
lock cylinders do not
retract - Continued.
Outrigger floor lock
cylinders do not retract
properly.
All floor lock valve spool is
clogged.
Check for foreign matter
in valve spool.
Remove valve spool and clean
valve spool ports out.
Replace valve spool
component if necessary.
Inside surfaces of outrigger
floor lock cylinder is dirty /
covered with foreign matter,
which prevents the cylinder
from retracting fully.
Check for foreign matter
on inside surfaces of
outrigger floor lock
cylinders.
Disassemble and clean
outrigger floor lock cylinders.
Pilot operated check valve(s)
is malfunctioning - not
opening check valve or
check valve is clogged.
Check for broken or bent
components or foreign
matter in pilot operated
check valve.
Remove pilot operated check
valve components. Clean out
any foreign matter. Replace
any broken or bent
components.
All functions run too slow. No error codes are
displayed, but all functions
are too slow or do not
extend or retract fully.
Motor pump is worn or
leaking.
Replace suspect motor
pump with known
working motor pump.
Replace motor pump. Refer
to para 4.26 or 4.27.
Motor pump pressure relief
valve is malfunctioning.
Replace suspect
pressure relief valve with
known working pressure
relief valve.
Replace pressure relief valve
and spring. Refer to para
4.29.
Discharge filter is clogged
with foreign matter.
_ Replace discharge filter.
Refer to para 4.24.
Reservoir strainer is clogged
with foreign matter.
Visually check reservoir
strainer for excessive
foreign matter.
Replace reservoir strainer.
Refer to para 4.27.
One function is too slow;
the rest are operating
properly.
No error codes are
displayed, but function is
too slow or does not
extend or retract fully.
Valve spool for suspect
function is clogged.
Check for foreign matter
in valve spool.
Remove valve spool and clean
valve spool ports out.
Replace valve spool
component if necessary.
One of pilot operated check
valves for suspect function is
malfunctioning - not opening
check valve or check valve is
clogged.
Check for broken or bent
components or foreign
matter in pilot operated
check valve.
Remove pilot operated check
valve components. Clean out
any foreign matter. Replace
any broken or bent
components.
One of orifices for suspect
function is clogged with
foreign matter (does not
apply to column cylinder or
floor lock cylinders).
Remove orifice and
check for foreign matter.
Remove orifice and clean.
Cylinder for suspect function
is malfunctioning.
Replace suspect cylinder
with known working
cylinder.
Replace malfunctioning
cylinder.
No error codes are
displayed, but column
function moves too slowly
or does not extend or
retract fully.
Column plates and wear
pads are binding.
Check for foreign matter,
corrosion, nicks,
scratches, or other
damage to wear
surfaces of column plates
or wear pads.
Replace column plates or
wear pads.
One function is too fast;
the rest are operating
properly.
No error codes are
displayed, but function is
too fast.
One of orifices for suspect
function is missing ( NOTE:
only applies to early units
which have orifices external
to cylinders.)
Check for missing orifice. Replace orifice.
© Schaerer Mayfield USA, Inc. 2004
To Next Page
Loading...
