Troubleshooting Guide (Dcr-880-H-Dc & Dcr-880-H-Hp-Dc) - Vestil DCR-880 Series Instruction Manual

rev. 6/7/2018
Troubleshooting Guide (DCR-880-H-DC & DCR-880-H-HP-DC):
Contact technical support for assistance resolving issues not addressed in the guide.
Issue
1. Carriage does not rise and
motor does not run
2. Carriage does not rise but
motor is running or humming.
3. Carriage rises too slowly.
4. Motor labors or is extremely
hot.
5. "Spongy" carriage rises in
jerks or is spongy when
elevated.
6. Carriage lowers too slowly
when loaded.
7. Carriage lowers too quickly.
8. Carriage rises then lowers
slowly on its own.
9. Carriage elevates but does
not lower.
Copyright 2018 Vestil Manufacturing Corp.
Possible Cause
a. Low battery voltage. (Check light)
b. All chassis connections to negative post of
battery not made well.
c. Voltage at motor terminals might be too low
to run pump at existing load.
d. Fluid level in reservoir is low.
e. Load exceeds capacity requirements.
Relief valve is allowing hydraulic fluid to flow
back into the reservoir.
f. Suction filter is clogged, starving pump.
g. Suction line fittings are loose allowing air to
enter.
h. Filter/Breather cap on tank is clogged.
i. Lowering solenoid valve might be energized
by faulty wiring or might be stuck
j. Hydraulic pump not operating.
k. Foreign material stuck in lowering solenoid
valve causing fluid to flow back into the
reservoir.
l. Foreign material clogging suction filter or
breather cap, or a hose is pinched.
m. Low motor voltage.
n. Unit overloaded.
o. Inoperative pump.
p. Battery voltage too low.
q. Oil starvation causing pump to bind &
overheat. [NOTE: If this occurs, pump can be
permanently damaged.]
r. Binding cylinder.
s. Fluid starvation.
t. Air in system.
u. Lowering solenoid valve filter screen
clogged.
v. Pinched tube or hose.
w. Foreign material in flow control valve.
x. Binding cylinders.
y. Foreign material in velocity fuse.
z. Foreign material stuck in flow control valve.
(In this case, carriage initially lowers at a
normal rate but accelerates as the carriage
descends).
aa. Lowering solenoid valve may be
incorrectly wired or is stuck open
bb. Check valve stuck open.
cc. Leaking hoses, fittings, pipes.
dd. Cylinder packing is worn or
ee. Incorrect lowering solenoid valve
ff. Lowering solenoid valve is stuck.
gg. Faulty lowering solenoid coil.
Remedy
a. Recharge battery
b. Check and tighten or clean connections if
necessary.
c. Measure voltage at motor terminals (as near as
possible) while pump runs under load. Check for
loose wiring connections.
d. Add fluid. (See p. 16 for proper fluid
e. DO NOT CHANGE RELIEF VALVE SETTING.
Instead, reduce the load to rated capacity.
f. Remove filter and clean.
g. Inspect all fittings for proper tightness.
h. Remove cap and
i. Remove lowering solenoid valve. Check and
clean. (Refer
open. 20.)
j. Disconnect hydraulic line from power unit. Put
pressure line in a large container and operate
pump. If no
and correct as
contact factory for replacement parts.
k. Lower the
solenoid valve and
l. Correct as appropriate. (See
m. See 1 (b)
n. See 2 (e)
o. See 2 (j)
p. See 1 (b)
q. See 2 (d),
r. Align cylinder correctly.
s. See 2 (d),
t. See air bleed procedure (p. 17).
u. Remove lowering solenoid valve and clean filter
screen.
v. Correct as appropriate.
w. Remove and clean flow control valve. Refer to
Hydraulic Circuit Diagram on p.
x. Align cylinders correctly.
y. Remove and clean velocity fuse. Refer to
Hydraulic Circuit Diagram on p.
z. Remove flow control valve from the valve block
and clean. (Refer to Hydraulic Circuit Diagram on
p. 19).
aa. See 3 (k).
bb. Remove and clean check
cc. See 2 (c).
damaged. dd. Replace packing
replacement parts).
wiring. ee. Correct per diagram (p.
ff. Lightly tap down the solenoid coil body to seat it
properly. (DO NOT hit coil hard as it will
permanently damage the internal
remove the solenoid valve from the block because
the carriage will descend dangerously quickly.)
gg. Remove and replace. DO NOT remove the
lowering solenoid valve from the block because the
carriage will lower in an uncontrolled manner.
DCR-880, MANUAL
level.)
clean.
to "Lowering Solenoid Valves" on p.
output, check the pump motor coupling
appropriate. If pump is worn,
carriage. Remove the lowering
clean. (Refer to p. 20).
also, 2(f), (h)).
(f), (g), (h), (j)
(f), (g), (j)
19).
19).
valve.
(contact factory for
19).
system.
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