Graco Husky 1050 Repair Parts page 11

8. For motors with DataTrak: Remember to reattach
the solenoid bracket and the solenoid.
9. For motors with Pulse Count or DataTrak: Use
screw to attach the reed switch assembly to the new
air valve. Reconnect cable.
10. Reconnect the air line to the motor.
Replace Seals or Rebuild Air Valve
NOTE: Repair kits are available. See page 25 to order
the correct kit(s) for your pump. Air Valve Seal Kit parts
are marked with a †. Air Valve Repair Kit parts are
marked with a . Air Valve End Cap Kit parts are
marked with a .
Disassemble the Air Valve
1. Perform steps 1-5 under Replace Complete Air
Valve, page 10.
2. See F . 4. Use a Torx screwdriver (T8 for alumi-
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num centers, T9 for plastic centers) to remove two
screws (209). Remove the valve plate (205),
cup assembly (212-214), spring (211), and detent
assembly (203).
3. Pull the cup (213) off of the base (212). Remove the
o-ring (214) from the cup.
4. See F . 4. Remove the retaining ring (210) from
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each end of the air valve. Use the piston (202) to
push the end caps (207, 217) out of the ends.
Remove end cap o-rings (206). If pump model is
equipped with a runaway protection solenoid, also
remove the solenoid release button (218) and
o-ring (219).
5. Remove the u-cup seals (208) from each end of the
piston (202), then remove the piston. Remove the
detent cam (204) from the air valve housing (201).
313435ZAA
Reassemble the Air Valve
NOTE: Apply lithium-based grease whenever instructed
to grease.
1. Use all parts in the repair kits. Clean other parts and
inspect for damage. Replace as needed.
2. Grease the detent cam (204) and install into hous-
ing (201).
3. Grease the u-cups (208) and install on the piston
with lips facing toward the center of the piston.
208†
Lips face down
202
208†
Lips face up
F . 3. Air valve u-cup installation
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4. Grease both ends of the piston (202) and install it in
the housing (201), with the flat side toward the cup
(212). Be careful not to tear u-cups (208) when slid-
ing piston into housing.
5. Standard or Pulse Count models (no runaway
protection solenoid): Grease new o-rings (206)
and install on the end caps (207). Install the end
caps into the housing.
DataTrak models (with runaway protection sole-
noid): Orient the air valve so the air inlet faces for-
ward. Grease and install new o-ring (206) on
right-side end cap (207). Grease and install new
o-ring (206) and the solenoid release button (218)
and o-ring (219) on left-side end cap (217). Install
the end caps into the housing.
6. Install a retaining ring (210) on each end to hold end
caps in place.
Repair
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