Graco 17C305 Manual De Usuario

1.

Follow Pressure Relief Procedure, 

page 10, before checking or repairing.

2.

Check all possible problems and causes 

before disassembling the unit.

Pump output is low

Spray tip worn.

Follow Pressure Relief Procedure, 

page 10, then replace tip. See 

separate gun or tip manual.

Spray tip clogged.

Relieve pressure. Check and clean 

spray tip.

Paint supply.

Refill and reprime pump.

Intake strainer clogged.

Remove and clean, then reinstall.

Intake valve ball and piston ball are 

not seating properly.

Remove intake valve and clean. 

Check balls and seats for nicks; 

replace if necessary. See pump 

manual. Strain paint before using to 

remove particles that could clog 

pump.

Fluid filter or tip filter is clogged or 

dirty.

Clean filter.

Prime valve leaking.

Follow Pressure Relief Procedure, 

page 10, then repair prime valve.

Verify pump does not continue to 

stroke when gun trigger is released. 

(Prime valve not leaking.)

Service pump. See pump manual.

Leaking around throat packing nut 

which may indicate worn or damaged 

packings.

Replace packings. See pump manual. 

Also check piston valve seat for 

hardened paint or nicks and replace if 

necessary. Tighten packing 

nut/wet-cup.