24 308553
Service
Reassembly
1. Install the shaft seals (30}) in the housing (1).
Using a rubber mallet, carefully drive the bearings
(31}) flush into the housing so the holes face out.
See Fig. 16.
2. Grease the diaphragm shaft (23}) and slide it into
the housing (1). Install the o-rings (404*) in the
grooves of the housing.
3. Assemble the inner diaphragm plates (118), dia-
phragms (401*), and outer diaphragm plates (103)
as shown in Fig. 16. Apply medium-strength (blue)
LoctiteR or equivalent to the threads of the fluid-
side plates (103), and torque the plates to 75 to 85
in-lb (8.5 to 9.6 NSm) at 100 rpm maximum using a
1/2-in. socket wrench. Do not over-torque. These
parts must be assembled correctly.
CAUTION
Do not over-torque the outer diaphragm plates
(103). Doing so will damage the hex heads.
4. When installing the covers (101), slip the clamps
(111) over the housing (1) before positioning the
covers. See the Detail in Fig. 16. Engage the
notches in the covers with the locator tabs on the
housing, then position the clamps over both parts.
The clamp bolts should be on the air valve side of
the housing, and pointing down toward the bottom
of the pump. Install the grounding strip on the
bolts. Apply thread lubricant to the bolts, then
install the clamp nuts (113). Using a 7/16” socket
wrench, torque the nuts to 50 to 60 in-lb (5.6 to 6.8
NSm). See Torque Sequence, page 32.
5. Reassemble the ball check valves and manifolds
as explained on page 21. Always install new
o-rings (108*), and make sure they are properly
seated.
6. Reinstall the air valve, using the six mounting
screws (15). See Fig. 10.
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