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TROUBLESHOOTING
u8£o
PROBLEM
Engine wiU not start or stops
while operating.
Engine is overloaded
Pressure increases when gun is dosed
Engine is running but pump won't
build maximum pressure or has
irregular pressure
No intake of chemicals
Trigger will not move
Water in crankcase
Noisy operation
Rough/pulsating operating with
pressure drop
High crankcase temperatures
PROBLEM CAUSE CORRECTION
Low-oil shutdown Fill engine with oil
Engine switch not in"ON" position Turn switch" ON"
Pressure built up in the hose Squeeze trigger while starting
Nozzle partially blocked Clean nozzle
Shorten the spring coil of the
Excessive pressure reflux valve
Bypass valve blocking Clean the bypass valve
Faucet closed Open faucet
Unit has been stored in freezing Thaw out unit completely
temperatures, including hose, gun and wand.
Inadequate water supply Provide a minimum of 4 gpm at 20psi
Water inlet screen dogged Clean screen
Kink in garden hose Straighten garden hose
Wand nozzle worn or damaged Replace nozzle
Let it run with gun open and wand
Air in pump removed untit steady stream of
water is released.
Set to maximum position
Adjustable pressure knob not set
to maximum position
Suction or discharge valves clogged
or worn out
Clean the suction or discharge
valves
Bypass valve not operating
effectively Clean the bypass valve
Injection tube not securely
inserted into unit Push firmly into injector
Tube cracked or split
Wrong nozzle
Injector turned off
The axle of the inner aperture of Use a threeway cock with the
Replace tube
Switch to low pressure nozzle
Turn collar counter clockwise
the threeway cock is different
Injection tube strainer clogged
Nozzle blocked
Dried chemicals injector
Gun safety lock engaged
High humidity
Worn seals
Worn bearings
imbibition function
Clean strainer
Clean nozzle
Dissolve by running warm water
Release safety lock
Change oil more frequently
Change the oil seals
Change the bearing
Check inlet lines for restrictions
Air mixed with water
and/or proper sizing
Check system for stoppages, air
Inlet restriction leaks, correctly sized inlet
plumbing to pump
Unloader Check unloader for proper operation
Check inlet lines for restrictions
Air mixed in water and/or proper sizing
Wrong grade of oil Use recommended oil
Improper amount of oil in crankcase Adjust oil level to proper amount
7
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