Graco Husky 1050HP Repair Parts page 23

7. Reattach the secondary side fluid cover (2).
The arrow must point toward the air valve. See
Torque Instructions, page
To avoid injury, keep your fingers away from
the moving diaphragms when air pressure is
applied.
334390E
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24.
8. To ensure proper seating and extend diaphragm
life, apply air pressure to the pump prior to
attaching the fluid cover on the primary air
module.
NOTE: Be sure the High/Low valve is attached. NOTE: NOTE:
See Replace Complete High/Low Valve, page
a. Place the supplied tool on top of the air valve
gasket (213). Arrows (A) must face toward
the fluid cover that is already attached.
Figure 3 Diaphragm Install Tool
b. Reattach the air valve.
c. Supply a minimum of 10 to 20 psi (0.07–0.14
MPa, 0.7–1.4 bar) air pressure to the air
valve. Shop air may be used. The diaphragm
will shift so the second fluid cover will seat
properly. Keep air pressure on until the
second fluid cover is attached.
d. Attach the second fluid cover (2). See
Torque Instructions, page
e. Remove the air valve and the tool. Verify that
the gasket (213), is in place, and reattach the
air valve. See Torque Instructions, page
NOTE: These steps must be followed NOTE: NOTE:
anytime the fluid covers are removed.
f. Reassemble the ball check valves
and manifolds as explained in
Check Valve Repair, page
g. If not already attached, reinstall the air lines
and the muffler.
Repair
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