Troubleshooting

 

What to Check

What to Do

 

If check is OK, go to next

When check is not OK,

Problem

check

refer to this column

 

 

 

Fluid is spitting from gun

Air in pump or hose.

Check and tighten all fluid

 

 

connections. Cycle pump as slowly as

 

 

possible during priming.

 

 

 

 

Spray tip is partially clogged.

Clear tip. See Clear Tip Clog, page

 

 

23.

 

 

 

 

Fluid supply is low or empty.

Refill fluid supply. Prime pump. See

 

 

pump manual. Check fluid supply

 

 

often to prevent running pump dry.

 

 

 

Pump is difficult to prime

Air in pump or hose.

Check and tighten all fluid

 

 

connections. Cycle pump as slowly as

 

 

possible during priming.

 

 

 

 

Intake valve is leaking.

Clean intake valve. Be sure ball seat

 

 

is not nicked or worn and that ball

 

 

seats well. Reassemble valve.

 

 

 

 

Pump packings are worn.

Replace pump packings. See pump

 

 

manual.

 

 

 

 

Paint is too thick.

Thin the paint according to supplier

 

 

recommendations.

 

 

 

Sprayer operates for 5 to 10 minutes

Pump packing nut too tight. When

Loosen pump packing nut. Check for

then stops

pump packing nut is too tight the

leaks around throat. If necessary,

 

packings on the pump rod restrict

replace pump packings. See Pump

 

pump action and overloads the motor.

manual.

 

 

 

32

334466A

Page 32
Image 32
Graco 334466A Possible during priming, Spray tip is partially clogged, Fluid supply is low or empty, Paint is too thick