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Models 8751/8754Troubleshooting Guide
PROBLEM PROBABLE CAUSE REMEDY PAGE
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 c ylinder. c. The piston and liquid valve
body must be assembled
correctly and f it s nugly in
the pump c ylinder.
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d. Missing or def ective
spring or poppet.
d. Replace.
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15. E xcessive pump c ylinder
wear.
a. Inadequate or incorrect
lubrication of pump
cylinder.
a. Follow l ubrication
procedures carefully.
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b. Incorrect ball crank
rotation.
b. Contact service
technician.
-- -- --
16. P itting occurring inside t he
pump cylinder.
a. Cleaner was l eft inside t he
pump cylinder.
a. After b rush c leaning the
pump cylinder, a llow it to
air dry. Follow
disassembly procedures
carefully.
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17. The ball crank of the
motor r educer is broken.
a. Incorrect rotation of pump
motor.
a. Contact service
technician.
-- -- --
18. Too m uch pressure in t he
freezing c ylinder.
a. Plugged r elief 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.
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