Craftsman 919.679240 User Manual download pdf (Page 15)

TROUBLESHOOTING

SYMPTOM

CAUSE

SOLUTION

Engine won’t

1. Engine throttle is in "OFF" Position.

1. Slide throttle to "Run" position.

start

2. Choke lever has not been placed to

choke.

2. Slide choke lever to choke position.

3. Pressure buildup after initial use.

3. Depress trigger gun.

Wqn’t Draw

1. Nozzle not in chemical draw position.

1. Push nozzle forward at end of wand.

Chemical

2. Chemical 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. Chemical injector orifice obstructed

or stuck.

4. Check and clean.

Pump running

normally but

pressure does

1. Water supply restricted. 1. Check water supply and filter screen for

blockage. Check hoses for blockage, kinks,

leaks, etc.

not achieve rated

values

2. Nozzle is in low PSI position.

2. Pull nozzle at end of wand back to the high pressure

position.

3. Nozzle incorrect or worn.

3. Check and replace.

4. Pump sucking air.

4. Check that hoses and fittings are airtight.

5. Nozzle blocked.

5. Clean nozzle.

Fluctuating

Pressure

1. Pump sucking air.

1. Check that hoses and fittings are airtight. Purge air

from garden hose.

2. Garden hose inlet strainer clogged. 2. Clean. Check filter frequently.

3. Worn Seals or Packing.

3. Check and replace.

4, Inadequate water supply.

4. Check hose for kinks.

5. Fouled or dirty inlet or discharge

valves.

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. Nozzle clogged, partially obstructed.

1. Check connection. Replace if cracked or

punctured.

normal use

2, Nozzle worn. 2. Clean or replace.

3. Valves worn, dirty or stuck.

3. Check and replace.

4. Worn 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 airtight.

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 oil (oil

milky);

2. Piston packing and oil seal worn.

2. Check and replace oil seals.

Water dripping

1. Fittings Loose.

1. Tighten.

from pump

2. 0-rings of piston guide or retainer 2. Check and replace.

worn.

3. Piston packing worn.

3. Check and replace.

Oil Dripping

1. Oil seal worn

1. Check and replace

2. Loose drain plug or worn drain plug

o-rinq.

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

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Craftsman 919.679240 User Manual Page 15

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