SLNM
, Manual
Copyright 201
5
Vestil Manufacturing Corp.
Page
9
of
1
4
T
ROUBLESHOOTING
:
Before performing any corrective action described in the following table, block the drive
wheel off of the ground.
Contact Vestil for problems at time of installation, or for any problems not addressed below.
Problem:
Possible
cause(s):
Action:
Unit does not respond to
ra
ise and lowe
r
controls
(does not
ra
ise o
r
lowe
r)
Battery voltage low (battery
charge lower than
12
Volts)
Fuse blown
Charge batter
y
Bad batter
y
; load test batteries
and replace if necessary.
Unit will not charge
Charger malfunction
Remove back shroud and check
fuses.
Verify output voltage on
charger, it should be
14
to
15
volts, dc, connected to batter
y
,
and plugged into 115vac.
Forks raise, then drift down
e
Check valve or Soleniod
valve leaking (containment
holding open the lowering
valve or the check valve)
e low
Remove & inspect.
. Remove any load from the forks.
. Remove the nut holding solenoid
coil on the valve stem, and then
unscrew the valve from the
manifold.
. Inspect the valve for
contaminants, and the valve’s o-
rings and back –up washers for
cuts, tears, and other damage.
. With valve immersed in mineral
spirits or kerosene, use a thin tool
such as a small screwdriver or a
small hex wrench to push the
poppet in and out several times
from the bottom end of the valve.
The valve should move freely,
about 1/16” from closed to open
position. If it sticks in, the valve
stem could be bent and will need to
be replaced if it doesn’t free up
after cleaning. Blow the valve off
with a compressed-air gun while
again pushing the poppet in and
out.
Lift Height no longer is achieved
e
Hydraulic oil level is too
low.
ow
Refill hydraulic oil (Do not use
brake fluid or jack oil in the
hydraulic system. If oil is
needed, use an anti-wear
hydraulic oil with a viscosity
grade of 150 SUS at 100°F,
(ISO 32 @ 40° C), or a non-
synthetic transmission fluid.)
when forks are in lowered
position.
