Vestil HIPM series - Manual (Page 8)

8
HYDRAULIC EQUIPMENT
Trouble Shooting Quick Reference Guide
(For further information contact the factory)
1.) Forks do not raise but pump is running or
humming.
2.) Forks raise too slowly.
3.) Motor labors, or is excessively hot.
a. Voltage at motor terminals may be too low
to run pump at existing load.
b. Hose or hydraulic line is leaking.
c. Fluid level in reservoir is low.
d. Load exceeds capacity requirements. Relief
Valve is bypassing the fluid back into the
reservoir.
e. Suction filter is clogged, starving pump.
f. Suction line may be leaking air, due to loose
fittings.
g. Filler/Breather cap on tank may be clogged.
h. Down Valve may be energized by faulty
wiring or stuck open.
i. Hydraulic pump may be inoperative.
j. Low battery (DC units only).
a. Foreign material stuck in Down Solenoid,
causing some fluid to bypass back into tank.
b. Foreign material clogging suction filter,
breather cap, or a pinched hose.
c. Low motor voltage.
d. Table overloaded.
e. Pump is inoperative.
f. Low battery (DC units only).
a. Voltage may be low.
b. Incorrect wiring.
c. Oil starvation causes pump to bind. High
internal heat is developed. If this occurs,
pump may be permanently damaged.
d. Binding cylinders.
e. Low battery (DC units only).
Possible Cause Remedy Observation
a. Measure voltage at motor terminals or as
near as possible, while pump is running
under load. If voltage is sufficient, check for
inadequate or incorrect wiring as this can
starve the motor. (Refer to chart in Owner's
Manual for recommendations.) Correct as
necessary.
b. Correct as necessary.
c. Add fluid. Refer to Owner's Manual for
proper fluid levels.
d. DO NOT CHANGE RELIEF VALVE
SETTING. Instead, reduce the load to rated
capacity.
e. Remove and clean.
f. Inspect all fittings for proper fit.
g. Remove and clean.
h. Remove Solenoid Valve. Check and clean
(Refer to Hydraulic Section of Owner's
Manual p. 6).
i. Disconnect hydraulic line at power unit. Put
pressure line in a large container and cycle
pump. If no output, check the pump motor
coupling, which may be defective, and
correct as necessary. If pump is worn,
consult factory for replacement parts
service.
j. Adequately charge battery before further
operation. (Refer to Charging Section of
Owner's Manual.)
a. Lower the forks. Remove the Solenoid
Valve and clean (Refer to Hydraulic Section
of Owner's Manual p.6).
b. Correct as necessary. (See also, 1(f), (h).
c. See 1(a).
d. See 1(e).
e. See 1(j).
f. Charge battery.
a. See 1(a).
b. Check that one leg of the motor lines is not
connected to ground.
c. See 1(d), (f), (g), (h), (j).
d. Align cylinders correctly.
e. Charge battery.