Graco 257815 Manuale utente

313768B

Repair Kit

Piston Repair Kit

257815

- For servicing the piston on FinishPro 290 sprayers -

NOTE: For proper compressor operation, you must also replace

the valve plate assembly (kit 257836) when replacing the piston.

Pressure Relief Procedure

Important Safety Instructions

For detailed instructions and warnings,

see sprayer manual.

To reduce the risk of injury from injection, always follow

this procedure when instructed to relieve pressure,

stop spraying, service equipment, or install or clean

spray tip.

1. Set power/function selection switch to OFF and

unplug sprayer.

2. Turn pressure knob to lowest setting.

3. Hold gun to side of grounded metal pail. Trigger the

gun to relieve pressure.

4. Turn prime valve to PRIME.

If you suspect spray tip or hose is completely clogged, or

that pressure has not been fully relieved after following

these steps, VERY SLOWLY loosen tip guard retaining

nut or hose end coupling to relieve pressure gradually,

then loosen completely. Clear tip or hose obstruction.

ti9346a

ti8943a

2313768B

Disassembly

1. Relieve Pressure (see cover) and unplug sprayer.

2. Remove shroud and compressor:

a. Loosen IEC cord clamp screw and remove IEC

plug from compressor.

b. Remove air hose from compressor and remove

outlet fitting from compressor.

c. Remove four screws. Tip compressor assembly

down and forward to remove from sprayer.

Place compressor on workbench.

d. Remove two screws and IEC cord clamp.

Remove two screws and compressor shroud.

3. Remove cooling tube (71) by loosening cooling tube

nuts (70).

4. Use 1/2 in. socket to remove three bolts (100) from

head (74).

5. Use flat-blade screwdriver to pry head (74) from top

of plate (75) and cylinder (76) from bottom of valve

plate (75).

6. Use 7/32 in. allen wrench to remove hex screw (87)

from piston rod (77).

ti13409a

ti13411a

ti13416a

ti13664a

ti13414a

ti13941a

100

ti13940a

313768B 3

Reassembly

1. Replace piston (77) and cylinder (76) and use 7/32

in. allen wrench to tighten hex screw (87) into piston

rod.

2. Replace valve plate (75) with ribs facing up toward

head.

3. Replace three bolts (100) and use 1/2 in. socket to

tighten into head (74). Torque all three bolts to 75

in-lb, then torque all bolts again to 210 in-lb.

4. Replace cooling tube (71) by tightening cooling tube

nuts (70).

5. Replace Compressor and shroud:

a. Install compressor shroud with two screws.

Install IEC cord clamp with two screws.

b. Install air inlet fitting.

c. Tip compressor assembly up and back into

frame. Install four screws.

d. Install IEC connector and tighten cord clamp.

Install air hose to outlet fitting. Make sure cord is

pushed in as far as it can go to ensure a good

connection.

NOTICE

Piston and cylinder come

packaged together. Do NOT

let piston and cylinder come

apart. If they do, make sure

you drop the piston down

through the top of the cylinder

and tilt the piston as you pull

it through the cylinder. Do

NOT push the piston up from

the bottom. You could easily

damage the piston gasket. ti8943a

100

ti13414a ti13664a

ti13411a

ti13442a

ti13420a

4313768B

All written and visual data contained in this document reflects the latest product information available at the time of publication.

Graco reserves the right to make changes at any time without notice.

This manual contains English. MM 313768

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441

www.graco.com

Altri manuali Graco Utensili

Graco

Graco LD Series Manuale utente

Graco

Graco 245820 Manuale utente

Graco

Graco LD Series Manuale utente

Graco

Graco 750 Series Manuale utente

Graco

Graco SD Series Manuale per l'uso e la cura

Graco

Graco SD Composite Series Manuale utente

Graco

Graco 224268 Manuale operativo

Graco

Graco SD Series Manuale utente

Graco

Graco SD 10 Series Manuale utente

Graco

Graco Twistork 224854 Manuale elenco delle parti

Graco

Graco 309446A Manuale elenco delle parti

Graco

Graco XD30 Series Manuale utente

Graco

Graco 350 Series Manuale operativo

Graco

Graco Ultra-lite A Series Manuale operativo

Graco

Graco LD Series Manuale utente

Graco

Graco SD Series Manuale per l'uso e la cura

Graco

Graco XD40 Guida all'installazione

Graco

Graco 223-440 Manuale operativo

Graco

Graco 200 Series Manuale operativo

Graco

Graco SD Series Manuale utente

Graco

Graco MAGNUM C Series Manuale

Graco

Graco 17J866 Manuale utente

Graco

Graco SDX Series Manuale utente

Graco

Graco Pro–Shot 242055 B Series Manuale operativo

Manuali Utensili popolari di altre marche

Martor

Martor SECUNORM 175 Manuale utente

ERKCO

ERKCO 1000 Manuale utente

jbc

jbc N4473 Manuale utente

FEINMETALL

FEINMETALL FZWZ-SET-001 Manuale utente

Worx Professional

Worx Professional Sonicrafter WU676 Manuale utente

Gage Bilt

Gage Bilt GB713SH Manuale utente

Hilti

Hilti DX 9-ENP Manuale utente

norbar

norbar NORTRONIC 34399 Manuale utente

BGS technic

BGS technic 8578 Manuale utente

Makita

Makita DHR241 Manuale utente

Motor Guard

Motor Guard JMB-1250 Manuale utente

Power Adhesives

Power Adhesives 805-12 Manuale utente

Clemco

Clemco 24189 Manuale utente

VVG

VVG VNG 903 Series Manuale utente

Hilti

Hilti FX 3-A Manuale utente

Grizzly

Grizzly H6472 Manuale utente

axing

axing BWZ 5-02 Manuale utente

Dh-Robotics

Dh-Robotics RGI-100 Come usare