Graco 257836 Manual de usuario

313770A

Repair Kit

Valve Plate Repair

Kit 257836

- For use with FinishPro 290 sprayers -

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

ti13938a

2313770A

Disassembly

1. Relieve Pressure (see cover) and unplug sprayer

from outlet.

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. Loosen cooling tube nuts (70) and remove cooling

tube (71).

4. Use 1/2 in. socket to loosen and remove three bolts

(100) from head (74).

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

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

valve plate.

ti13409a

ti13411a

ti13416a

ti13664a

ti13414a

ti13937a

100

313770A 3

Reassembly

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

ribs on head (74).

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

tighten head (74). Torque all three bolts to 75 in-lb,

then torque all bolts again to 210 in-lb.

3. Install cooling tube (71) by tightening two cooling

tube nuts (70).

4. 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.

100

ti13937a

ti13414a ti13664a

ti13411a

ti13442a

ti13420a

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 313770

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

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

www.graco.com

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