Graco 313770A Valve Plate Repair Kit 257836 Repair Kit Owner's Manual

Repair Kit
Valve Plate Repair
Kit 257836
313770A
- For use with FinishPro 290 sprayers Important Safety Instructions
For detailed instructions and warnings,
see sprayer manual.
Pressure Relief Procedure
ti13938a
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.
ti9346a
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.
Disassembly
1. Relieve Pressure (see cover) and unplug sprayer
from outlet.
3. Loosen cooling tube nuts (70) and remove cooling
tube (71).
2. Remove shroud and compressor:
4. Use 1/2 in. socket to loosen and remove three bolts
(100) from head (74).
a. Loosen IEC cord clamp screw and remove IEC
plug from compressor.
5. Use flat-blade screwdriver to pry head (74) from top
of valve plate (75) and cylinder (76) from bottom of
valve plate.
100
74
70
ti13409a
b.
Remove air hose from compressor and remove
outlet fitting from compressor.
75
71
70
ti13411a
c.
Remove four screws. Tip compressor assembly
down and forward to remove from sprayer.
Place compressor on workbench.
ti13937a
ti13416a
d. Remove two screws and IEC cord clamp.
Remove two screws and compressor shroud.
ti13414a
2
ti13664a
313770A
Reassembly
1. Replace valve plate (75) with ribs facing up toward
ribs on head (74).
b.
Install air inlet fitting.
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).
ti13411a
c.
100
Tip compressor assembly up and back into
frame. Install four screws.
74
70
75
71
ti13442a
70
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.
ti13937a
4. Replace compressor and shroud:
a. Install compressor shroud with two screws.
Install IEC cord clamp with two screws.
ti13420a
ti13414a
313770A
ti13664a
3
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
Copyright 2009, Graco Inc. is registered to ISO 9001
www.graco.com

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project