Vestil DCR-880-H, Руководство пользователя

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Table of Contents Rev. 6/30/2020 DCR-880, MANUAL
Table of Contents Copyright 2020 Vestil Manufacturing Corp. Page 23 of 25
TROUBLESHOOTING: DCR-880-H-DC & DCR-880-H-HP-DC
Contact technical support for assistance resolving issues not addressed in the guide.
Issue Possible Cause Remedy
1. Carriage does not rise and
motor does not run
a. Low battery voltage . (Check light)
b. All chassis connections to negative post of
battery not made well.
a. Recharge battery
b . Check and tighten or clean connections if
necessary.
2. Carriage does not rise but
motor is running or humming.
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 open .
j . Hydraulic pump not operating.
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 level .)
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 clean .
i. Remove lowering solenoid valve. Check and
clean. Refer to Lowering Solenoid Valves on p.
20 .
j. Disconnect hydraulic line from power unit. Put
pressure line in a large container and operate
the pump. If no output , check the pump motor
coupling and correct as appropriate . If pump is
worn , contact factory for replacement parts.
3. Carriage rises too slowly . 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.
k. Lower the carriage . Remove the lowering
solenoid valve and clean . Refer to p. 20 .
l . Correct as appropriate. (See also , 2(f), (h).
m . See 1 (b)
n . See 2 (e)
o. See 2 (j)
4. Motor labors or is extremely
hot.
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.
p. See 1 (b)
q . See 2 (d), (f) , (g) , (h), (j)
r . Align cylinder correctly.
5 . "Spongy” carriage rises in
jerks or is spongy when
elevated.
s . Fluid starvation .
t. Air in system .
s . See 2 (d), (f) , (g), (j)
t . See air bleeding procedure ( p. 17 ).
6. Carriage lowers too slowly
when loaded .
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.
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. 19 .
x . Align cylinders correctly.
y. Remove and clean velocity fuse. Refer to
Hydraulic Circuit Diagram on p. 19 .
7 . Carriage lowers too quickly . z. Foreign material stuck in flow control valve.
(In this case, carriage initially lowers at a
normal rate but accelerates as the carriage
descends).
z. Remove flow control valve from the valve
block and clean. Refer to Hydraulic Circuit
Diagram on p. 19 .
8. Carriage rises then lowers
slowly on its own.
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 damaged .
aa . See 3 (k) .
bb. Remove and clean check valve .
cc. See 2 (c).
dd . Replace packing . Contact factory for
replacement parts .
9. Carriage elevates but does
not lower .
ee. Incorrect lowering solenoid valve wiring .
ff . Lowering solenoid valve i s stuck.
gg. Faulty lowering solenoid coil.
ee . Correct per diagram (p. 19) .
ff . Lightly tap down the solenoid coil body to
seat it properly . (DO NOT hit coil hard as it will
permanently damage the internal system . DO
NOT remove the solenoid valve from the block
because the carriage will descend dangerously
quickly.)
gg . Remove and replace. DO NOT remove the