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Page 38
Excessive crankshaft
play or loud, knocking
noise in pump
Broken or worn bearing or
connecting rod in crankcase
Replace pump or bearing
or connecting rod
Locate point of oil leakage
and replace damaged
O-ring or seal
Replace seals
Replace seals
Replace seals. Install cor-
rect pump oil
Loose drain plug or damaged
seal
Leaking crankshaft oil seal
Leaking oil sight glass seal
Leaking piston oil seal
Repair or replace check
valve
Check valve malfunctioning
Oil leaking from pump
Water is emitted from
chemical siphon tube
Strainer clogged
Detergent valve not open or
clogged
Strainer not submerged in
solution
Clean or replace. Rinse
after each use.
Open valve then clean.
Replace if necessary
Submerge strainer, replen-
ish chemical if needed
Detergent hose cut or kinked
Inspect hose, replace if
necessary
Inlet injection will not
siphon detergent
Adjustable knob on injector is
closed (if equipped)
Open by turning counter
clockwise
Unit not in low pressure mode
Open dual wand (if equipped)
or install soap nozzle
Detergent hose cut or kinked Inspect hose, replace as
required
Detergent strainer plugged or
not submerged
Check screen on strainer
pickup tube
Internal injector parts corroded
or stuck
Disassemble, clean or
replace
Outlet water temperature is too
high
Use with cold water only
(150
o
maximum)
Downstream injector will
not siphon detergent
Turn machine o for ten
minutes then restart. If
problem persists, take unit
to an authorized service
center for diagnosis.
Unloader failure / coil
overheating / Excessive
system pressure
Pressure relief valve
releasing water
PUMPING SYSTEM cont.
Problem Probable Cause Remedy
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