Craftsman 919.678250 - Manual (Page 31)

TROUBLESHOOTING
SYMPTOM CAUSE SOLUTION
Engine won’t 1. Engine throttle is in "OFF" Position. 1. Slide throttle to "Rabbit" position.
start 2. Choke iever has not been piaced to
choke.
2. Slide choke lever to choke position.
3. Pressure buildup after initial use. 3. Depress trigger gun.
Won’t Draw 1. Nozzle not in chemical draw position. 1. Place nozzle to low pressure.
Chemical 2. Chemicai screen is obstructed. 2. Check chemical screen; clean if obstructed.
3. Chemical screen not working. 3. Make sure chemical screen is submerged in
chemical/water.
4. Chemicai injector orifice obstructed
or stuck.
4. Check and clean.
5. Chemicai injector ciosed. 5. Open chemical injector by turning adjustment
knob.
Pump running
normaliy but
pressure does 1. Water suppiy restricted. 1. Check water supply and filter screen for.
blockage. Check hoses for blockage, kinks,
leaks, etc.
not achieve
rated vaiues 2. Nozzie is in iow PSl position. 2. Twist nozzle at end of wand clockwise the high
pressure position.
3. Nozzie incorrect or worn. 3. Check and replace.
4. Pump sucking air. 4. Check that hoses and fittings are air-tight.
5. Nozzie blocked. 5. Clean nozzle.
Fluctuating
Pressure 1. Pump sucking air. 1. Check that hoses and fittings are air tight. Purge air
from garden hose.
2. Garden hose inlet strainer ciogged. 2. Clean. Check filter frequently.
3. Worn Seáis or Packing. 3. Check and replace.
4. Inadequate water supply. 4. Check hose for kinks.
5. Fouled or dirty iniet or discharge
vaives.
5. Check flow available to pump. Check for
excessive heat, 145° F or above.
6. Leaky discharge hose. 6. Clean inlet and discharge valve assemblies.
Replace if damaged.
Pressure drops
after period of 1. Nozzie clogged, partially obstructed. 1. Use nozzle cleaning kit to clear obstruction. (See
Nozzle Maintenance under Service Adjustment.)
normai use 2. Nozzle worn. 2. Clean or replace.
3. Pump Valves worn, dirty or stuck. 3. Check and replace.
4. Worn pump piston packing. 4. Check and replace.
Pump noisy 1. Water too hot. 1. Reduce temperature below 63° C or 145° F.
2, Pump sucking air. 2. Check that hoses and fittings are air tight.
3. Valves dirty or worn. 3. Check, clean or replace.
4. Worn bearings. 4. Check and replace if necessary.
Presence of 1. High humidity. 1. Change Oil.
water in oii (oii
milky). 2. Piston packing and oii seal worn. 2. Check and replace oil seals.
Water dripping 1. Thermal relief functioning normal. 1. Protecting pump, if not using pressure washer for
from pump 2. Fittings Loose. a long period of time, shutoff engine.
3. 0-rings of piston guide or retainer 2. Tighten.
worn. 3. Check and replace.
4. Piston packing worn. 4. Check and replace.
Oil Dripping 1. Oil seal worn 1. Check and replace
2. Loose drain plug or worn drain plug
o-ring.
2. Tighten drain plug or replace O-ring. Do not overtorque.
16