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SYMPTOM
Engine won't
start
Won't Draw
Chemical
Pump running
normally but
pressure does
not achieve
rated values
Fluctuating
Pressure
Pressure drops
after period of
normal use
Engine throttle is in "OFF" Position,
Choke lever has net been placed to 2.
choke,
3, Pressure buildup after initial use. 3,
1. Nozzle not in chemicar draw position, 1_
2_ Chemical screen is obstructed. 2,
3, Chemical screen not working, 3.
4o Chemical injector orifice obstructed 4.
orstuck,
5o Chemical injector closed. 5.
1. Water supply restricted, t,
2. Nozzle is in low PSi position. 2-
3, Nozzle incorrect or wom,, 3,
4, Pump sucking air, 4.
5o Nozzle blocked. 5,
1. Pump sucking air. 1.
2. Garden hose inlet strainer clogge& 2.
3. Worn Seals or Packing. 3.,
4, inadequate water supply, 4,
5. Fouled or dirty inlet or discharge 5.
valves.
6. Leaky discharge hose. 6,
1. Nozzle clogged, partially obs_ctedo 1,
2o Nozzle worn, 2.
3. Pump Valves worn, dirty or stuck. 3,
4, Worn pump piston packing, 44
CAUSE
1,,
2.
SOLUTION
1, Slide throttle to "Rabblt" position,
Slide choke lever to choke position,
Depress trigger gun°
Place nozzle to low pressure,
Check chemical screen; clean if obstructed
Make sure chemical screen is submerged in
chemical/water.
Check end clean.
Open chemical injector by turning adjustment
knob.
Check water supply and filter screen for,
blockage. Check hoses for blockage, kinks,
leaks, etc.
Twist nozzle at end of wand clockwise the hlgh
pressure position.
Check and replace.
Check that hoses and fittings are airtJghL
Clean nozzle.
Check that hoses and fittings are air tighL Purge air
from garden hose,
Clean. Check fitter frequently.
Check and replace.
Check hose for kinks,
Check flow available to pump,, Check for
excessive heat, 145° F or above.
Clean inlet and discharge valve assemblies,
Replace if damaged,
Use nozzle cleaning kit to clear obstruction. (See
Nozzle Maintenance under Service Adjustment,)
Clean or replace.
Check and replace.
Check and replace,
Pump noisy
Presence of
water in oil (oil
milky),
Water dripping
from pump
Oil Dripping
1, Water too hot,
2., Pump sucking air.,
3, Valves dirty or womo
4. Worn bearings.
I, High humidity.
2, Piston packing and oil seal worn,
I, Thermal relief functioning normal,
2. Fittings Loose,
3. O-rings of piston guide or retainer
worn°
4. Piston packing worn.,
1.
2
Oilsealworn
Loose drainplugorworn dra]n plug
o-ring.
1, Reduce temperature below 630 C or 145° Fo
2, Check that hoses and fittings are airtighL
3. Check, ciean or replace,
4. Check and replace if necessary,
1, Change Oil,
2. Check and replace oilseals,
1. Protecting pump, if not using pressure washer for
a tong period oftime, shutoff engine.
2. Tighten.
3. Check and replace,
4o Check and replace.,
1, Check and replace
2, Tighten drain plug or replace o,.ring Do not over torque,
16