Scotsman NM650R Service Manual page 36

NM650R
REMOVAL AND REPLACEMENT: Gearmotor Assembly
1. Remove the electrical wires from the gear
drive motor.
2. Unscrew the 4 cap screws holding the
gearmotor to the gearmotor plate.
3. Remove the gearmotor from the icemaker.
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 case cover output gear, bearings,
and shaft are one 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 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
Charging Procedures
Extra care must be taken when recharging this
remote system. No liquid refrigerant may be
placed in the system at the compressor. DO
RECEIVER
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, cover will
have to be moved closer to the second gear
after the output gear has cleared the second
gear top bearing.
E) After the case is together, and the locating
pins are secure in both ends, replace all cap
screws.
Note: If the gearcase cover was replaced, the
replacement part MAY HAVE BEEN shipped
with a certain number of shims. The number of
shims used must match the number written
on the gearcase cover. If there was no
number on the cover, and no shims with
the part, do not use any shims . Do not use
the old shims.
4. Bench test the gearmotor, check for oil
leaks, noise, and amp draw.
NOT use the schrader valves at the front of
the unit for weighing in the charge. All liquid
R-502 must be weighed into the receiver
through the "front seated" king valve".
FRONT SEATED
KING VALVE
SERVICE PORT
December, 1988
Page 36
CHARGING
CYLINDER