Reassemble The Air Valve; Replace Pilot Valves - Graco Dyna-Star 26A938 Instructions Manual

Repair

Reassemble the Air Valve

1. Lubricate detent cam (104) and install into housing.
2. Lubricate the u-cups (108) and install on the piston
(103) with the lips facing the center of the piston.
102
F . 6
IG
3. Lubricate both ends of the piston (102) and install it
into the housing.
4. Lubricate the detent assembly (103) and install it
into the piston.
12
5. Lubricate new o-rings (106) and install on the end
6. Install a snap ring (110) onto each end to held the
108
Lips Face Down
F . 7
IG
7. Install the spring (111).
8. Lubricate and install the air valve cup (112).
9. Align the small round magnet with the air inlet.
10. Install the valve plate (105), then tighten the screws
108

Replace Pilot Valves

Lips Face Up
1. Stop the pump in the middle of its stroke. Follow
2. Disconnect the air line to the motor.
3. Use a 10 mm socket wrench to remove the old pilot
4. Lubricate and install the new pilot valves (19)
caps (107) and install the end caps into the housing.
end caps in place.
112
Magnet
(109) to hold in place.
Pressure Relief Procedure, page 10.
valves (19) from the top and bottom covers.
(torque 95 - 105 in-lb/10.7 - 11.9 N•m).
Manual 3A7718A