Troubleshooting - Craftsman 919.670280 Owner's Manual

SYMPTOM
CAUSE
Engine won't
1. Engine throttle is in "OFF" Position.
start
2. Choke lever has not been placed to
choke.
3. Pressure buildup after initial use.
Won't Draw 1. Adjustment knob on soap nozzle is
Chemical turned fully clockwise for less soap (-).
2. Chemical screen is obstructed.
3. Chemical screen not working.
4. Chemical injector orifice obstructed
or stuck.
Pump running 1. Water supply restricted.
normally but
pressure does
not achieve rated 2. Adjustment knob on soap nozzle is
values turned fully clockwise for less soap (-).
3. Nozzle incorrect or worn.
4. Pump sucking air.
5. Nozzle blocked.
Fluctuating
1. Pump sucking air.
Pressure
2. Garden hose inlet strainer clogged.
3. Worn Seals or Packing.
4. Inadequate water supply.
5. Fouled or dirty inlet or discharge
valves.
6. Leaky discharge hose.
Pressure drops
1. Nozzle clogged, partially obstructed.
after period of
normal use
2. Nozzle worn.
3. Valves worn, dirty or stuck.
4. Worn piston packing.
Pump noisy
1. Water too hot.
2. Pump sucking air.
3. Valves dirty or worn.
4. Worn bearings.
Presence of
1. High humidity.
water in oil (oil
2. Piston packing and oil seal worn.
milky);
1. Fittings Loose.
Water dripping
2. O-rings of piston guide or retainer
from pump
worn.
3. Piston packing worn.
1. Oil seal worn
Oil Dripping
2. Loose drain plug or worn drain plug
o-ring.
D20590

TROUBLESHOOTING

SOLUTION
1. Slide throttle to "Run" position.
2. Slide choke lever to choke position.
3. Depress trigger gun.
1. Turn knob counterclockwise for more soap (+).
2. Check chemical screen; clean if obstructed.
3. Make sure chemical screen is submerged in
4. Check and clean.
1. Check water supply and filter screen for
2. Turn knob counterclockwise for more soap (+).
3. Check and replace.
4. Check that hoses and fittings are airtight.
5. Clean nozzle.
1. Check that hoses and fittings are airtight. Purge air
2. Clean. Check filter frequently.
3. Check and replace.
4. Check hose for kinks.
5. Check flow available to pump. Check for
6. Clean inlet and discharge valve assemblies.
1. Check connection. Replace if cracked or
2. Clean or replace.
3. Check and replace.
4. Check and replace.
1. Reduce temperature below 63
2. Check that hoses and fittings are airtight.
3. Check, clean or replace.
4. Check and replace if necessary.
1. Change Oil.
2. Check and replace oil seals.
1. Tighten.
2. Check and replace.
3. Check and replace.
1. Check and replace
2. Tighten drain plug or replace o-ring. Do not over
16-ENG
chemical/water.
blockage. Check hoses for blockage, kinks,
leaks, etc.
from garden hose.
excessive heat, 145 O F or above.
Replace if damaged.
punctured.
torque.
O C or 145 O F.