SYMPTOM SOLUTION
Enginewon't 1, Slidethrottle to "Run" position.
start 2, Slidechoke leverto chokeposition.
3. Depress trigger gun.
Won't Draw 1. Turn knob counterclockwise for more soap (+).
Chemical
Pump running
normally but
pressure does
not achieve rated
values
Fluctuating
Pressure
CAUSE
1. Enginethrottle isin "OFF" Position.
2. Choke lever has not beenplaced to
choke.
3. Pressure buildup after initialuse.
1. Adjustment knob on soap nozzle is
turned fully clockwise for lesssoap (-).
2. Chemical screen is obstructed.
3. Chemical screen not working.
4. Chemical injector orifice obstructed
or stuck.
1. Water supply restricted.
2. Adjustment knob on soap nozzleis
turned fully clockwise for lesssoap (-)
3. Nozzleincorrect or worn.
4. Pump sucking air.
5. Nozzleblocked.
1. Pump sucking air.
2. Garden hose inlet strainer clogged.
3. WornSeals orPacking.
4. Inadequatewater supply.
5. Fouled or dirty inlet or discharge
valves.
Leaky discharge hose.
2. Check chemical screen; clean if obstructed.
3. Make sure chemical screen issubmerged in
chemical/water.
4. Check and clean.
1. Check watersupply and filter screen for
blockage. Check hosesfor blockage, kinks,
leaks, etc.
2. Turn knob counterclockwise for more soap (+).
3. Check and replace.
4. Check thathoses andfittings areairtight.
5. Clean nozzle.
1. Check that hoses andfittings are airtight. Purge air
from garden hose.
2. Clean. Check filter frequently.
3. Check and replace.
4. Check hose for kinks.
5. Check flow available to pump. Check for
excessive heat, 145° For above.
Clean inlet and discharge valve assemblies.
Replace if damaged.
6. 6.
Pressuredrops 1. Nozzleclogged, partially obstructed. 1. Check connection. Replace ifcracked or
after periodof punctured.
normal use 2. Nozzleworn. 2. Clean or replace.
3. Valvesworn, dirty or stuck. 3. Check andreplace.
4. Worn piston packing. 4. Check and replace.
Pumpnoisy 1. Water too hot. 1. Reducetemperaturebelow63°Cor145°F.
2. Pumpsucking air. 2. Check that hoses and fittings areairtight.
3. Valves dirty or worn. 3. Check, clean or replace.
4. Wornbearings. 4. Check and replace if necessary.
Presence of 1. High humidity. 1. Change Oil.
water in oil (oil 2. Piston packing and oil seal worn. 2. Check andreplace oilseals.
milky);
Water dripping 1. Fittings Loose. 1. Tighten.
from pump 2. O-rings of piston guide or retainer 2. Check and replace.
worn.
3. Piston packing worn. 3. Check and replace.
OilDripping 1. Oil sealworn 1. Check and replace
2. Loose drain plugor worn drain plug 2. Tighten drain plug or replace o-ring. Do not over
o-ring, torque.
02os9oR_,o ,_oo 16-ENG