Craftsman 919.763010 owner manual Symptom, Cause, Solution

SYMPTOM

Engine won't start

Won't Draw Chemical

Pump running normally but pressure does not achieve rated values

Fluctuating

Pressure

CAUSE

1.Engine throttle is in "OFF" Position.

2.Choke lever has not been placed to choke.

3.Pressure buildup after initial use.

1.Nozzle not in chemical draw position

2.Chemical screen is obstructed.

3.Chemical screen not working.

4.Chemical injector orifice obstructed or stuck.

5.Chemical injector closed.

1. Water supply restricted.

2, Nozzle is in low PSI position.

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.

SOLUTION

1.Slide throttle to "Rabbit" position.

2.Slide choke lever to choke position.

3.Depress trigger gun.

1.Place nozzle to low pressure.

2.Check chemical screen; clean if obstructed.

3.Make sure chemical screen is submerged in chemical/water.

4.Check and clean.

5.Open chemical injector by turning adjustment knob.

1. Check water supply and filter screen for.
	blockage. Check hoses for blockage, kinks,
	leaks,	etc.
2.	Twist	handle for high		pressure,
3.	Check	and	replace.
4.	Check	that	hoses and	fittings	are air-tight.
5.	Clean	nozzle.
1.	Check that hoses and fittings				are air tight. 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, 145o F or above.
6.	Clean inlet and discharge valve assemblies.
	Replace if damaged.

Pressure drops after period of normal use

Pump noisy

Presence of water in oil (oil milky).

Water dripping from pump

Oil Dripping

1.Nozzle clogged, partially obstructed.

2.Nozzle worn.

3.Pump Valves worn, dirty or stuck.

4.Worn pump 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.Thermal relief functioning normal. 2, Fittings Loose.

3.O-rings of piston guide or retainer worn.

4.Piston packing worn.

1.Oil seal worn

2.Loose drain plug or worn drain plug o-ring.

1.	Use nozzle cleaning kit to clear obstruction. (See
	Nozzle Maintenance under Service Adjustment.)
2.	Clean or replace,
3.	Check and	replace.
4.	Check and	replace.
1.	Reduce temperature below 63° C or 1450 F.
2.	Check that	hoses and fittings are air tight.
3.	Check, clean or replace.
4.	Check and replace if necessary,

1.Change Oil.

2.Check and replace oil seals.

1.Protecting pump, if not using pressure washer for a long period of time, shutoff engine.

2.Tighten.

3.Check and replace.

4.Check and replace.

1_ Check and replace

2. Tighten drain plug or replace O-ring. Do not over torque.

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