2008T Troubleshooting Guide
P/N 490292 Rev. A
UF- 4.0.0 ISOLATE UF PUMP (#22) MECHANICS
a) Turn the machine OFF and disassemble the UF Pump.
b) Per the Figure right, TWO (2) checks:
Check #1: ENSURE a STRONG spring is
under the OUTPUT (colored)
nozzle AND its seal is pointing
INTO the pump; Replace the
spring if damaged or bent.
Check #2: ENSURE a WEAK spring is
under the INPUT (white)
nozzle AND its seal is pointing
AWAY from the pump. Replace
the spring if damaged or bent
c) Per the Figure below, FOUR (4) more checks:
Check #3: ENSURE the diaphragm is NOT torn and for debris in the ports!
Check #4: ENSURE the Retaining Clip is in the slot to hold the ‘Heavy Spring’ at its maximum
compression
Check #5: ENSURE a ‘shim washer’ has not fallen into the solenoid cavity which may ‘jam’ the
diaphragm shaft! WARNING! While checking keep track of ALL ‘shim washers’
Check #6: Check the solenoid and diaphragm assembly for corrosion.
d) Reassemble the pump and attach the tubing but DO NOT mount the pump to the cabinet yet!
e) Proceed to
page 554, procedure number UF- 6.0.0.
Figure 88 – UF Pump Exploded
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