Repair The Air Valve For 1050 Pumps - Graco SaniForce BV Series Instructions Manual

Repair
Repair the Air Valve for 1050
Pumps
Tools Required:
• Torque wrench
• 10 mm hex wrench
• Lithium-base grease
Repair kits are available (purchase separately). Use all
parts in the kit for best results. See Kits and
Accessories, starting on page 34.
Service the air valve as follows. See F
Disassemble the Air Valve for 1050 Pumps
To avoid severe burns, do not touch hot fluid or hot
equipment.
1. Perform the Pressure Relief Procedure, page 12.
2. Disconnect all air and fluid lines from the
equipment.
3. Remove the fasteners (33) from the air valve
housing (40).
4. Remove the air valve housing (40) from the center
section (1).
5. Remove the valve plate (44), cup assembly (51. 52.
53), spring (50), and detent assembly (42).
6. Pull the cup (52) off of the base (51).
7. Remove the o-ring (53) from the cup.
8. Remove the retaining ring (49) from each end of the
air valve housing (40).
9. Use the piston (41) to push the end caps (46) out of
the ends of the air valve housing (40).
10. Remove end cap o-rings (45).
11. Remove the u-cup seals (47) from each end of the
piston (41), then remove the piston.
12. Remove the detent cam (43) from the air valve
housing (40).
13. Clean and inspect for wear or damage. Replace as
needed.
22
Install the Air Valve for 1050 Pumps
1. Grease the detent cam (43).
2. Install the detent cam (43) into housing (40).
3. Grease the u-cups (47).
4. Install the u-cups (47) on the piston (41). Ensure the
. 10–F . 13.
IG IG
F
IG
5. Grease both ends of the piston (41).
6. Install the piston (41) in the housing (40), with the
7. Install a retaining ring (49) on each end of the
8. Grease and install the detent assembly (42) into the
9. Install the o-ring (53) on the cup (52).
10. Apply a light film of grease to the outside surface of
11. Orient the end of the base (51) with the magnet
12. Tilt the base (51) toward the cup (52) and fully
13. Install the spring (50) onto the protrusion on the
lips of the u-cups (47) face toward the center of the
piston (41).
47
1
41
47
2
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. 10: Air valve u-cup installation
flat side toward the cup (51).
NOTE: Be careful not to tear the u-cups (47) when
sliding the piston (41) into the housing (40).
housing (40) to hold the end caps in place.
piston (41).
the o-ring (53) and the inside mating surface of the
base (51).
(51b) toward the end of the cup (52) with the larger
cutout. Engage the opposite end of the parts.
Leave the end with the magnet free.
engage the parts. Ensure that the o-ring (53)
remains in place.
cup (52).
Lips face down.
1
Lips face up.
2
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