Vestil HIPM-2748-DC handleiding
Handleiding
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Table of Contents Rev. 5/11/2020 HIPM, MANUAL
Table of Contents Copyright 2020 Vestil Manufacturing Corp. Page 14 of 18
AIR BLEEDING PROCEDURE
If the forks descend very slowly or will not lower at all, air is probably trapped somewhere in the hydraulic circuit
and must be bled from the system. Air can be bled from a “bleeder” screw located at the top of the cylinder. To bleed
air from the system:
1. Loosen the bleeder screw by
1
/
4
to
1
/
2
a turn to allow trapped air to escape. Press the foot pump treadle (manual
units) or jog the motor (powered units) to push air out of the hydraulic circuit.
2. When the cylinder is purged of air only clear hydraulic fluid will flow from the bleeder opening. Tighten the screw
to close the opening.
HYDRAULIC SYSTEM TROUBLESHOOTING GUIDE
Contact the manufacturer to discuss issues not identified in the table below.
Observation
Possible Cause
Remedy
1. Forks do not raise even though
pump is running.
a. Voltage at motor terminals too low.
b. Hose is leaking.
c. Fluid level is low.
d. Load exceeds capacity, i.e. relief valve
opening.
e. Suction filter clogged.
f. Suction line leaking air (loose fittings).
g. Filler/breather cap on reservoir clogged.
h. Lowering valve energized or stuck open.
i. Pump malfunctioning.
j. Low battery charge (DC units only).
a. Measure voltage at motor terminals (or as
close to them as possible) while pump
runs under load. If voltage is adequate,
check wiring. Refer to the appropriate
wiring diagram for your unit (FIGS. 3-7).
b. Repair leak(s).
c. Add oil to reservoir. See oil specifications
in Inspections & Maintenance on p. 15-16.
d. Reduce load to within rated load of lifter.
DO NOT CHANGE RELIEF VALVE
SETTING!
e. Remove filter and clean it.
f. Inspect all fittings for proper, leak-tight fit.
g. Remove and clean.
h. Remove solenoid valve. Check and clean
valve. Refer to Operation section on p. 13.
i. Disconnect hydraulic hose at power unit.
Put end of hose in a large container and
cycle pump. If no oil output , check pump-
motor coupling and correct if necessary. If
pump worn, contact manufacturer for
replacement parts.
j. Stop using lifter and adequately charge
battery before returning to service.
2. Forks rise very slowly.
k. Debris stuck in lowering solenoid
allowing oil to flow to reservoir.
l. Debris clogging suction filter or breather
cap.
m. Pinched hose.
n. Low motor voltage.
o. Load exceeds capacity of lifter.
p. Pump inoperative.
q. Low battery charge (DC units).
k. Lower the forks. Remove the Lowering
valve and clean. See p. 13.
l. Remove and clean filter or breather cap.
m. Unkink hose.
n. See 1(a).
o. See 1(d).
p. See 1(i).
q. Stop using lifter and charge battery.
3. Motor labors or is extremely hot.
r. Voltage at motor terminals too low.
s. Incorrect wiring.
t.
Oil starvation causing pump to bind
producing high internal heat. Pump
might be permanently damaged.
u. Binding cylinder.
v. Low battery charge (DC units).
r. See 1(a).
s. Specifically check to see if one leg of
motor wiring is not connected to ground.
t. See 1(c), (e), (f), (i).
u. Realign cylinder.
v. Stop using lifter and charge battery.
4. Spongy forks (sink a bit when
loaded) or forks jerk when being
raised.
w. Oil starvation.
x. Air trapped in cylinder.
w. See 1(c), (e), (f), (i).
x. See Air bleeding procedure on p. 14.
5. Forks lower very slowly when
loaded.
y. Lowering valve filter clogged.
z. Pinched hose.
aa. Debris caught in flow control valve.
bb. Binding cylinder.
cc. Debris in velocity fuse.
y. Remove solenoid valve and clean filter.
z. Correct as necessary.
aa. Remove and clea
n flow control valve.
Refer to Operation section on p. 13.
bb. Align cylinder.
cc. Remove and clean velocity fuse.
6. Forks lower too quickly.
dd. Leaking hoses and/or fittings.
dd. Correct or replace hoses/fittings to
eliminate leaks.
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Productinformatie
| Merk | Vestil |
| Model | HIPM-2748-DC |
| Categorie | Vorkheftruck |
| Taal | Nederlands |
| Grootte | 4943 MB |
