Vestil HIPM series - Manual (Page 9)

9
a. See 1(d), (f), (g), (j).
b. See air bleed procedure on p.7.
a. Remove Solenoid Valve and clean filter.
b. Correct as necessary.
c. Remove and clean Flow Control Valve.
(Refer to Hydraulic Section of Owner's
Manual p. 6).
d. Align cylinders correctly.
e. Remove and clean Velocity Fuse. (Refer to
Hydraulic Section of Owner's Manual p. 6).
a. Correct as necessary.
b. Remove and clean Check Valve. (Refer to
Hydraulic Section of Owner's Manual p. 6).
c. Remove Flow Control Valve from the Valve
Block and clean. (Refer to Hydraulic Section
of Owner's Manual p. 6).
a. See 2(a).
b. Remove and clean Check Valve. (Refer to
Hydraulic Section of Owner's Manual.)
c. Correct as necessary.
d. Replace packings.
a. Correct as necessary. (Refer to Electrical
Section of Owner's Manual.)
b. Lightly tap down the Solenoid Coil body to
seat it properly. (DO NOT hit coil hard as it
will permanently damage the internal stem).
DO NOT remove the Solenoid Valve from
the Block as the unit will come down at a
dangerous speed.
c. Remove and replace. (Refer to Electrical
Section of Owner's Manual.
d. Raise forks and remove the object blocking
the down travel, then press the down
button.
e. See 2(e).
f. To unlock, re-pressurize the hydraulic
system.
g. Refer to Velocity Fuse Section of the
Owner's Manual.
a. Charge battery.
a. Fluid starvation.
b. Air is trapped in cylinder.
a. Down Valve filter clogged.
b. Pinched tube or hose.
c. Foreign material in Flow Control Valve.
d. Binding cylinders
e. Foreign material in Velocity Fuse.
a. Leaking hoses and/or cracked fittings.
b. Check valve is stuck open.
c. Foreign material stuck in Flow Control
Valve.
a. Down Solenoid Valve may be incorrectly
wired or is stuck open due to dirt.
b. Check Valve may be stuck open.
c. Check for leaking hoses, fittings, pipes.
d. Cylinder packings may be worn or
damaged.
a. Incorrect Down Solenoid Valve wiring.
b. Down Solenoid Valve is stuck.
c. Faulty Down Solenoid Coil.
d. Object blocking down travel.
e. Binding cylinders.
f. In case of excessive down speeds, the
Velocity Fuse will become operative and
shut off the oil flow from the cylinders, thus
the platform will remain stationary.
g. Check if the Limit Switch is inoperative and
the platform has raised all the way so that
the mechanical stops are engaged. If
mechanical stops are engaged, the Velocity
Fuse has been locked up.
a. Low battery (DC units only).
4.) "Spongy" or "Jerky" table operation. Do not
confuse spongy operation with small surges
caused by foreign material on table wheel
roller plate.
5.) Forks lower too slowly when loaded.
6.) Forks lower too quickly.
7.) Forks raise then lower slowly.
8.) Forks raise, but do not lower.
9.) Erratic or uncontrolled operation.
Possible Cause Observation Remedy