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Repair
20 3A0732J
Reassemble the Air Valve
1. See F
IG
. 9. Lubricate detent cam (304◆ ) and install
into housing.
2. See F
IG
. 10. Lubricate the u-cups (308†◆) and
install on the piston (302◆) with lips facing toward
the center of the piston.
3. See F
IG
. 9. Lubricate both ends of the piston (302◆)
and install it in the housing.
4. Lubricate and install the detent assembly (303◆)
into the piston.
5. Lubricate new o-rings (306†✠◆) and install on the
end caps (307✠). Install the end caps into the hous-
ing.
6. Install a snap ring (310◆✠) on each end to hold end
caps in place.
7. Install the spring (311◆). Lubricate and install the air
valve cup (312◆), see F
IG
. 11. Align the small round
magnet with the air inlet.
8. Install the valve plate (305◆). Tighten the screws
(309†◆) to hold it in place.
Replace Pilot Valves
1. Stop the pump. Follow Pressure Relief Procedure,
page 10.
2. Disconnect the air line to the motor.
3. See F
IG
. 12. Push the safety spring (9) down and
hold to access the pilot valve on the bottom cover.
4. See F
IG
. 14 on page 23. Use a 10 mm wrench to
remove the old pilot valves (213) from the top and
bottom covers.
5. Lubricate and install the new pilot valves (213).
Torque to 95-105 in-lb (11-12 N•m).
F
IG
. 10. Air Valve U-cup Installation
Lips face down
Lips face up
†◆308
†◆308
◆302
ti12754a
F
IG
. 11. Air Valve Cup Installation
312◆
ti16283a
Magnet