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ProSpray 3.21 15
GB
Repairs at the unit
11
10
12
13
9
8
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. Unscrewbothcylinderheadscrews(Fig.13,Item1)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 (9) on the slider assembly (4).
5. Push piston (3) downward out of the pump manifold (2).
6. Unscrewretainernut(5)fromthepumpmanifold(2)and
remove piston guide (6).
7. Remove upper packing (7) and lower packing (8) from the
pump manifold (2).
4
5
6
7
2
8
1
3
9
8. Clean pump manifold (2).
9. Lubricate upper packing (7) and lower packing (8) with
machine grease.
10. Insert upper packing (Fig. 15) with O-ring (1) and protruding
lip (2) downward.
1
2
11. Insert lower packing (Fig. 16) with the beveled edge (1) facing
upward.
1
12. Insert piston guide (Fig. 14, Item 6) into the retainer nut (5).
Screw retainer nut (5) into the pump manifold (2) and tighten
by hand.
13. Push installation tool (included with the replacement
packings) for the piston (3) from above onto the piston.
14. Lubricate installation tool and piston (3) with machine grease.
15. Guide piston (3) through the lower packings (8) into the pump
manifold(2)frombelow.Usingarubbermallet,lightlytapthe
piston (3) from below until it can be seen above the pump
manifold.
16. Remove installation tool from piston (3).
17. Carefully tighten retainer nut (5) with adjusting wrench