Graco Fast-Ball 100 Instructions Manual page 11

F . 4
IG
17. Place the air piston o-rings (3b).
18. Reattach air cylinder (1) and tighten cylinder screw
(28).
Pump Piston
Repair Kit 279039 (includes 19 and 20), see Parts,
starting on page 12.
1. Follow the Pressure Relief Procedure, page 7.
2. Use a strap wrench on the fluid cylinder (23) to
loosen from the pump base (16).
3. Pull down on the piston rod (15) until the fluid
piston assembly (20, 19, and 22) can be accessed.
4. Hold the piston rod (15) stationary and unscrew the
pump piston valve (22).
NOTE: Be careful not to damage the surface of the
piston rod (15).
5. Remove and inspect fluid piston (19) and o-ring (20)
for any wear or damage, and replace as needed.
6. Put the fluid piston (19) and o-ring (20) back into
position.
7. Apply thread sealant to the theed of the fluid piston
valve (22).
3A9292B
8. Use a wrench to hold the piston rod (15) stationary
and reattach the fluid piston valve and torque to 75
to 100 in-lb (8.47 to 11.30 N•m).
NOTE: Place the fluid piston (19) flat surface to the flat
surface of the fluid piston valve (22). Make sure to not
reverse the direction of the fluid piston (19).
Intake Valve
Repair Kit 279040 (includes 10, 24 to 27), see Parts,
starting on page 12.
1. Follow the Pressure Relief Procedure, page 7.
2. Remove the valve housing (27).
3. Remove the o-ring (10), ball (25), spring (24), and
retainer (26). Inspect for any wear or damage,
replace as needed.
4. Replace the o-ring (10), ball (25), and spring (24)
into position.
5. Replace the valve housing (27) and tighten.
Repair
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