VERDER VERDERAIR VA 25 Manual page 9

Replace Seals or Rebuild Air Valve
NOTE: Repair kits are available. See page 21 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 8.
2. See F . 3. Use a Torx screwdriver (T8 for aluminum
IG
centers, T9 for plastic centers) to remove two screws
(209). Remove the valve plate (205),
cupassembly (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 . 3. Remove the retaining ring (210) from
IG
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).
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).
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 housing
(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 . 2. Air valve u-cup installation
IG
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. Grease new o-rings (206) and install on the end caps
(207). Install the end caps into the housing.
6. Install a retaining ring (210) on each end to hold end
caps in place.
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