Instruction manual

7
MobileMAX
Section 5 - MAINTENANCE &
Section 6 - REPLACEMENT
PARTS
5
Motor Pulley (Sheave)
Adjustment
This adjustment is made with the
cooler switched off. Never attempt
this adjustment with the cooler
operating.
Remove the drive belt.
To increase the fan speed and
therefore increase the motor amps,
the two halves of the motor pulley
(sheave) must be closer together,
i.e. turn the outer half clockwise.
To decrease the fan speed and
therefore decrease the motor
amps, the two halves of the motor
pulley must be further apart, i.e.
turn the outer half counter
clockwise.
The inner half of the motor pulley
can be moved in or out by
loosening the Allen screw. The
outer halve of the sheave is on a
large thread and can be moved in
our out in the desired direction.
If an adjustment is made, to the
inner pulley half, tighten the Allen
screw before replacing the belt and
checking the amps.
Small adjustments should be made
each time as you approach the
desired setting (see Belt Tension).
Belt Tension
Belt tension is important. Tight
belts will get excessive belt and
bearing wear, and loose belts will
slip with accompanying noise and
loss of cooler performance.
To make the adjustment, loosen
the locking nuts on the two
adjusting bolts. Screw the bolts in
or out as required to tighten or
loosen the belt tension. When the
adjustment is correct, tighten the
locking nuts again.
Factory Authorized Fan
Motors
Replacement motors should
have the same rating as the
original motor. Only Factory
Authorised Motors should be
used. These are listed in
Appendix 1, page 15.
Ensure that the replacement
motor has thermal overload
protection to avoid any risk of
motor seizure, overheating and
fire.
It is essential that the fan motor is
in good order and is maintained in
strict accordance with its
manufacturer's recommendations.
Never use motors which exibit
signs of mechanical or electrical
malfunction.
Water Pump
Water pump replacement note:
This cooler is equipped with
special safety circuits which
constantly monitor the condition of
the water pump motor. Should a
fault develop in the pump motor
the power supply to the cooler will
be automatically turned off and the
cooler will not run.
To ensure correct operation of this
safety feature it is essential that
only factory authorized
replacement water pumps are
used (see Appendix 1, page 15).
In addition to the integrated safety
circuits, factory authorized pumps
are equipped with thermal overload
protection. Pumps that have
thermal overload protection are
designed to shut off the pump if the
motor overheats.
Section 6 Replacement
Parts
4