Craftsman 919.670280 - Manuel (Page 16)

16-ENG D20590
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
Pump noisy
Presence of
water in oil (oil
milky);
Water dripping
from pump
Oil Dripping
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
chemical/water.
4. Check and clean.
1. Check water supply and filter screen for
blockage. Check hoses for blockage, kinks,
leaks, etc.
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
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 O F or above.
6. Clean inlet and discharge valve assemblies.
Replace if damaged.
1. Check connection. Replace if cracked or
punctured.
2. Clean or replace.
3. Check and replace.
4. Check and replace.
1. Reduce temperature below 63 O C or 145 O F.
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
torque.
CAUSE
1. Engine throttle is in "OFF" Position.
2. Choke lever has not been placed to
choke.
3. Pressure buildup after initial use.
1. Adjustment knob on soap nozzle is
turned fully clockwise for less soap (-).
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 nozzle is
turned fully clockwise for less soap (-).
3. Nozzle incorrect or worn.
4. Pump sucking air.
5. Nozzle blocked.
1. Pump sucking air.
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.
1. Nozzle clogged, partially obstructed.
2. Nozzle worn.
3. Valves worn, dirty or stuck.
4. Worn piston packing.
1. Water too hot.
2. Pump sucking air.
3. Valves dirty or worn.
4. Worn bearings.
1. High humidity.
2. Piston packing and oil seal worn.
1. Fittings Loose.
2. O-rings of piston guide or retainer
worn.
3. Piston packing worn.
1. Oil seal worn
2. Loose drain plug or worn drain plug
o-ring.
TROUBLESHOOTING