Graco Endura-Flo 4D150, Instructions - Parts Manual

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Repair/Service
Disassemble the Center Section
1. Use a 10 mm socket wrench to remove the four
bolts (17), then remove the air manifold (6). If
the air valve (1) doesn’t need service, leave it
attached to the air manifold.
2. Inspect the manifold gaskets (13, 14) for damage.
Remove if necessary.
3. Use a 10 mm socket wrench to remove the four
bolts (17), then remove the mounting bracket (5).
4. The pilot valves (12) can remain in place unless
they are damaged. If needed, use a 10 mm
socket wrench to remove the pilot valves.
5. Use a 13 mm socket wrench to remove the bolts
(10), then remove the air covers (7).
NOTE: The air covers should pop apart by hand.
If necessary, pry them apart with a screwdriver.
6. Pull the piston (20) out of the cylinder (27).
Remove the o-ring (28) from the piston.
7. Remove the cylinder (27) and inspect for
damage.
8. Inspect the air cover o-rings (29). Remove if
necessary.
9. Inspect the shaft u-cups (26). Remove if
necessary. The shaft bearings (23) can remain in
place. If the bearings are damaged and need to
be removed, use a screwdriver or a large punch
to push them out from the other side.
10. Inspect the bumpers (22) in place. If damaged,
use a flathead screwdriver to pry up the three
tabs of the bumper. The bumper should then
pop out.

Included in Air Cover Replacement Kit 17H312.
‡
Included in Air Motor Repair Kit 17H305.

Included in Air Section Fastener Kit 17H327.

Included in Piston Repair Kit 17H310. The kit also includes a bearing installation tool.
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