9.801-
296.0•Shark•Rev.11/12
15
PRESSURE
W
ASHER
T
roub
leshooting Guide
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
WATER ESCAPING FROM
FILL PIPE ON HEAT
EXCHANGER
Cold water added to heat exchanger Will stop once at operating tempera-
ture.
Ruptured coil or leaking
Check, repair or replace fittings.
UNLOADER DOES NOT
GO INTO BYPASS OR
WILL CYCLE ITSELF
Spray gun or hose is leaking to
atmosphere
Check and repair all leaks.
Check plunger either did not move
or did not seal
Remove discharge port. Clean and
inspect the check plunger. Replace the
o-ring if needed.
Actuator o-ring failure
Remove actuator plunger assembly
and inspect o-ring and back-up rings.
Replace if necessary.
SPIKES TOO HIGH
Slow moving actuator; this may be
caused by bad o-rings either on the
plunger or inside the actuator fitting.
Remove the actuator assembly to
inspect the o-ring and back-up rings.
The actuator assembly will have to be
disassembled to inspect and/or replace
the o-rings in the actuator fitting.
Spring tension
Adjustment should stop when pressure
is no longer affected by further com-
pression of the spring.
Hose length
Hose length can affect the amount of
spike pressure. Long lengths of hose
may cause high spike pressures.
SYSTEM WON’T COME
UP TO PRESSURE
Water is leaking between ball and
seat
Disassemble inlet fitting and check for
contaminates or worn parts. Clean or
replace as needed.
O-Rings on actuator plunger are
bad
Remove actuator assembly and in-
spect o-ring and back-up rings. Re-
place if necessary.
Locknut may be improperly set
Readjust locknut.
NOTE:
The locknut is inside the spring
on models that have the stem exposed
above the spring.
Tip/GPM combination is incorrect
Check actual GPM on unrestricted
pump and size tip accordingly.
Tip worn- the GPM may be greater
than expected with a worn tip
Replace tip.
Bad gauge - the pressure may be
higher than the gauge shows
Replace gauge.
