H.C Duke & Son 959R, Operator’S Manual With Illustrated Parts List

Page: 42 / 120

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34 184981
DUKE Model 959R Soft Serve Freezer
11 Routine Maintenance
– continued
MONTHLY
1. Test Head Switch
The head switch feature is designed to prevent the
beater shaft from being accidentally activated. It is
essential that the proper operation of this switch be
verified on a routine basis. Use the following instruc-
tions to test for proper operation:
A. Be sure all switches are in the "OFF"
position.
B. Disconnect the main power supply. The
freezer may have more than one discon-
nect switch.
C. Remove the dispense head and beater
shaft assemblies.
D. Connect the main power supply.
E. Turn the selector switches to the "CLEAN"
position.
F. Look inside the freezing cylinder toward
the rear. The beater drive coupling should
NOT
be turning. Turn the switches off and
disconnect the main power supply.
CAUTION
Moving parts. DO NOT place
hands in the freezing cylinder.
Severe personal injury could
result.
MONTHLY
–
continued
G. If the beater drive coupling is turning,
or you are unable to determine
whether or not the coupling is
turning, turn the switches to the
"OFF" position, disconnect the main
power supply and contact your local
authorized service company.
DO
NOT
place the freezer in service
until the problem has been fixed.
2. Water Condenser
Check the outlet water temperature of water
cooled condensers at the floor drain. Water
temperature should be about 105
º
F (40.6°C)
with a 70°F (21.1°C) water inlet temperature.
Make sure water is not running to the drain
with the freezer turned off.