Removal And Replacement: Gear Reducer And Motor - Scotsman FME504 Installation Manual

NME454, 654 & FME504, 804

REMOVAL AND REPLACEMENT: Gear Reducer and Motor

To Check the Motor:
1. Remove wires from terminals 1 and 2.
2. Use an ohmmeter to check for continuity. If
there is none, replace the motor only. If there is
continuity, but the motor will not start, check the
motor's start switch.
3. Remove motor end bell or motor stator. With
ohmmeter wires attached to 1 and 2, move
centrifugal switch actuator up and down to
simulate motor speed. If the ohmmeter does not
show any change, replace the switch or motor.
If the ohmmeter shows an open
circuit, replace the switch or
motor.
To Remove and Repair the Gear
and Motor Assembly:
(Assuming that the procedures through
removal of the water seal have been
performed.)
1. Remove the electrical wires from the
gear drive motor.
2. Unscrew the 4 cap screws holding the
gearmotor to the base of the machine.
3. Remove the gearmotor from the unit.
Bench test the gearmotor, check for oil leaks,
noise, and amp draw.
To Inspect the gearmotor.
A) Remove the cap screws holding the
gearmotor case halves together and pry the
two cases apart.
B) To lift off the cover, lift up until you can
feel internal contact, then pull the cover
towards the output gear end, and then lift
the cover (with drive motor attached) up
and away from the gear motor case.
Note: The gear case cover, output
gear, bearings and output shaft are a
pressed together assembly. Replace
as a unit.
C) Inspect the oil, gears, and bearings. If the oil
level and condition is acceptable, quickly check the
Electrical Shock Hazard.
Electrical shock can cause
personal injury.
Disconnect electrical
power before beginning.
COVER &
OUTPUT GEAR
ASSEMBLY
January 2007
gears and bearings. They are likely to be fine if the
oil is.
If there is evidence of water in the oil (rusty
bearings and gears; the oil having a creamy white
appearance; oil level too high) carefully inspect the
bearings and gears. If in doubt about the condition
of a part, replace it. The oil quantity is 14 fluid
ounces, do not overfill.
Note: The gears and bearings are available only as
pressed together sets.
D) After replacing parts as required, (if any)
reassemble the gearcase. The two smaller gears
and the oil should be in the
lower case, the output
gear will be with the
cover. As you lower
the cover onto the lower
case, the cover will have to
be moved closer to the
WATER SHED
second gear after the output gear has
cleared the second gear top
bearing.
both ends, replace all cap screws.
GEAR CASE
Page 30
E) After the case is together, and
the locating pins are secure in
Bench test the gearmotor, check
for oil leaks, noise, and amp draw.
CENTRIFUGAL
SWITCH
ROTOR
BEARING