32 Models 8751/8754TroubleshootingGuide
PROBLEM PROBABLE CAUSE REMEDY PAG E
REF.
14. The piston travels back
and forth, but product is
not being pumped.
a. Inspect the check bands. a. Check bands must be
installed correctly, fit
tightly, and not have any
holes or lubrication. Make
sure check bands are not
inside-out.
-- -- --
b. Inspect the o-rings. b. O-rings must not be worn,
torn, or fit too loosely.
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c. Check the pump cylinder. c. The piston and liquid valve
body must be assembled
correctly and fit snugly in
the pump cylinder.
18
d. Missing or defective
spring or poppet.
d. Replace. 19
15. Excessive pump cylinder
wear.
a. Inadequate or incorrect
lubrication of pump
cylinder.
a. Follow lubrication
procedures carefully.
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b. Incorrect ball crank
rotation.
b. Contact service
technician.
-- -- --
16. Pitting occurring inside the
pump cylinder.
a. Cleaner was left inside the
pump cylinder.
a. After brush cleaning the
pump cylinder, allow it to
air dry. Follow
disassembly procedures
carefully.
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17. The ball crank of the
motor reducer is broken.
a. Incorrect rotation of pump
motor.
a. Contact service
technician.
-- -- --
18. Toomuch pr essure in the
freezing cylinder.
a. Plugged relief hole in
liquid valve body below
poppet.
a. Clean. -- -- --
19. Not enough pressure in
the freezing cylinder.
a. Weak or bent spring in
liquid valve body.
a. Replace. -- -- --
b. Malfunctioning draw
switch.
b. Contact service
technician.
-- -- --
c. Missing poppet. c. Install the poppet. 19