User's Manual

Repair
12 3A0411F
7. Grease and install the detent assembly (203◆) into
the piston. Install the o-ring (214◆) on the cup
(213◆). Apply a light film of grease to the outside
surface of the o-ring and the inside mating surface
of the base (212◆).
Orient the end of the base that has a magnet toward
the end of the cup that has the larger cutout.
Engage the opposite end of the parts. Leave the
end with the magnet free. Tilt the base toward the
cup and fully engage the parts, using care so that
the o-ring remains in place. Install the spring (211◆)
onto the protrusion on the cup. Align the magnet in
the base with the air inlet and install the cup assem-
bly.
8. Grease the cup side and install the valve plate
(205◆). Align the small hole in the plate with the air
inlet. Tighten the screws (209◆†) to hold it in place.
Check Valve Repair
NOTE: Kits are available for new check valve balls and
seats in a range of materials. See page 34 to order kits
in the material(s) desired. O-ring and fastener kits also
are available.
NOTE: To ensure proper seating of the check balls,
always replace the seats when replacing the balls. Also,
on models with seat o-rings, replace the o-rings every
time the manifold is removed.
Disassembly
1. Follow the Pressure Relief Procedure on page 10.
Disconnect all hoses.
NOTE: The pump is heavy. Always use two people or a
lift to move it.
2. Remove the pump from its mounting.
NOTE: For plastic pumps (3300P), use hand tools
until thread-locking adhesive patch releases.
3. Use a 3/4 in. (19 mm) socket wrench to remove the
outlet elbow fasteners (8), then remove the manifold
assembly. See F
IG. 4.
4. Remove the o-rings (13, not used on some models),
seats (11), and balls (12).
5. Turn the pump over and remove the inlet manifold.
The mounting brackets will remain attached.
6. Remove the o-rings (13, not used on some models),
seats (11), and balls (12).
Reassembly
1. Clean all parts and inspect for wear or damage.
Replace parts as needed.
2. Reassemble in the reverse order, following all notes
in F
IG. 4. Put the inlet manifold on first. Be sure the
ball checks (11-13) and manifolds are assembled
exactly as shown. The arrows (A) on the fluid cov-
ers must point toward the outlet manifold.
F
IG. 3. Cup assembly
ti19286a
214
213
212
211