Troubleshooting Pump Style Freezers - Taylor 336 Service Manual

Troubleshooting Pump Style Freezers

PROBLEM
1. The air/mix pump will not operate
when the PUMP keypad is
pressed.
2. The air/mix pump will not operate
when the draw valve is opened
and the unit is in the AUTO mode.
3. The piston travels back and forth,
but product is not being pumped.
4. Excessive pump cylinder wear.
5. Pitting occurring inside the pump
cylinder.
6. The ball crank of the motor
reducer is broken.
7. Too much pressure is in the
freezing cylinder.
8. Not enough pressure is in the
freezing cylinder.
PROBABLE CAUSE
The circuit breaker is off.
The power cord is unplugged.
The freezer is out on reset.
The pump motor is out on reset.
The pump motor is out on reset.
The pump motor relay is
malfunctioning.
Inspect the check bands.
Inspect the o-rings.
Check the pump cylinder.
The spring or poppet is missing or
defective.
Inadequate or incorrect lubrication of
pump cylinder.
Incorrect ball crank rotation. (Must be
counterclockwise).
Cleaner was left inside the pump
cylinder.
Incorrect rotation of pump motor.
Plugged relief hole in the liquid valve
body below the poppet.
The spring in the liquid valve body is
weak or bent.
The draw switch is malfunctioning.
The poppet is missing.
REMEDY
Check the breaker.
Plug in the power cord.
Reset the freezer.
Press the PUMP keypad to cancel the
pump operation. Press the reset
button on the side of the pump motor
reducer. Press the PUMP keypad to
continue pump operation.
Press the PUMP keypad to cancel the
pump operation. Press the reset
button on the side of the pump motor
reducer. Press the PUMP keypad to
continue pump operation.
Replace the relay.
The check bands must be installed
correctly, fit tightly, and not have any
holes or lubrication.
O-rings must not be worn, torn, or fit
too loosely.
The piston and liquid valve body must
be assembled correctly, and fit snugly
in the pump cylinder.
Replace.
Follow lubrication procedures
carefully.
Reverse pump rotation.
After brush cleaning the pump
cylinder, allow it to dry. Follow
disassembly procedures carefully.
Reverse pump rotation.
Clean.
Replace.
Replace the draw switch.
Install the poppet.