Packings - WAGNER P20 0552488 Operating Manual

11.3

Packings

1. Remove inlet valve housing in accordance with the steps in
Chapter 11.2, Page 14.
2. It is not necessary to remove the outlet valve.
3. Unscrew both cylinder head screws (Fig. 11, Item 1) from
the pump manifold (2) with a 3/8 inch hexagon socket head
wrench.
4. Slide the pump manifold (2) and piston (3) forward until the
piston is out of the T-slot (10) on the slider assembly (5).
5. Push piston (3) downward out of the pump manifold (2).
6. Unscrew retainer nut (6) from the pump manifold (2) and
remove piston guide (7).
7. Remove upper packing (8) and lower packing (9) from the
pump manifold (2).
10
8. Clean pump manifold (2).
9. Lubricate upper packing (8) and lower packing (9) with
machine grease.
10. Insert upper packing (Fig. 12) with O-ring (1) and protruding
lip (2) downward.
1
2
11. Insert lower packings (Fig. 13) with O-ring (1) and protruding
lip (2) upward.
P20
GB
12. Insert piston guide (Fig. 11, Item 7) into the retainer nut (6).
13. Push installation tool (included with the replacement
14. Lubricate installation tool and piston (3) with machine grease.
15. Guide piston (3) through the lower packings (9) into the pump
16. Remove installation tool from piston (3).
5
17. Carefully tighten retainer nut (6) with adjusting wrench.
18. Slide the top of the piston (3) into the T-slot (10) on the slider
19. Position the pump manifold (2) underneath the gear unit
6
20. Attach pump manifold (2) to the gear unit housing. Ensure
7
8
21. Screw pump manifold (2) tightly to gear unit housing.
22. Lubricate O-ring (Fig. 9, Item 6) between pump manifold (2)
4
23. Push connection bend of suction hose into the inlet valve
2
24. Install front cover.
1
9
3
15
2
1
Screw retainer nut (6) into the pump manifold (2) and tighten
by hand.
packings) for the piston (3) from above onto the piston.
manifold (2) from below. Using a rubber mallet, lightly tap the
piston (3) from below until it can be seen above the pump
manifold.
assembly (4).
housing and push up until it rests against the gear unit
housing.
that the pressure sensor does not damage the pressure sensor
seal (10).
and inlet valve housing with machine grease. Screw inlet valve
housing to the pump manifold.
housing (Fig. 9, Item 1) and secure with retaining clip. Screw
on return hose and clamp to suction hose.
Repairs at the unit