Lift-Rite,
Tel:
Toll Free from USA: 1-800-558-6012, Greene, NY 13778, Publication Number 1234959D ©2022 Dated 14 Sep 2022
21
Accuracy
problem
Scale gives
different
readings for the
same load.
Mechanical
problem.
Load left and right fork with, for example, body
weight and see if the weight changes when you are
in different positions on the scale.
There should not be a difference larger than 2 lb.
(0.9 kg).
If there is a bigger difference than 5 lb. (2.3 kg), you
have a load cell or a mechanical problem.
To make sure it is a mechanical problem, repeat the
test with a heavy load on the scale. Lift a pallet with
2000 or 3000 lbs. (907 to 1361 kg).
Reset the indicator for 0 lb. using the tare function.
Load corners with body weight by standing on, or
on the sides of the pallet. If the readings change
more than 5 lb. (2.3 kg) you have a mechanical
problem.
With the forks lifted half way up, the brackets for
the loading wheels may touch the fork shoe. By
taking off the fork shoe, scratches show if and
where it touches. Check if the cover bolts are loose
and tighten as required.
Load cell
problem.
To be sure that it is not a mechanical problem, load
the load cells directly. Take off the fork cover. Try to
apply weight 55 to 110 lbs. (25 to 50 kg) direct onto
each load cell. If the indicator shows the same
reading, the load cells are OK.
Measure the resistance with an ohm meter
between the wires and load cell body. Do this with
the other load cells disconnected from the
indicator. The load cells should measure
approximately 350 ohms between the signal wires:
yellow and green, and excitation wires, black and
red.
CONDITION
SUB-
CONDITION
POSSIBLE
CAUSE
ACTION
