Installation Guide

Repair
10 3A3373C
Repair
Repair involves the removal and replacement
of worn or damaged parts.
Fluid Seal Replacement
For Non-bleeder guns use Seal Replacement
Kit, 287228. For bleeder guns use Seal
Replacement Kit, 287338.
1. Remove retaining ring (11), nozzle (28),
and needle assembly (9) through front
of gun.
2. Use a hook-shaped object to carefully
pull up-cup retainer and u-cup out of gun.
3. Using your finger or a 1/2-in. diameter
rod, push new seal (3) in place. Make
sure seal is seated against sleeve
bearing (35).
4. Insert u-cup retaining ring (41). Make
sure retaining ring is seated against
u-cup (3).
5. Graco recommends you replace the
entire fluid needle assembly at this time,
including the needle (9) spring (5),
packing o-ring (6) and guide (7).
6. Trigger gun a few times to make sure
u-cup and retainer are securely in place.
NOTICE
U-cup seals are very fragile. Never pound on
seal when during assembly.
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