WAGNER 0558009 Owner's Manual

22REPAIRS AT THE UNIT PS 3.2111.3 PACKINGS1. Remove inlet valve housing in accordance with the stepsin Chapter 11.2, Page 21.2. It is not necessary to remove the outlet valve.3. Unscrew both cylinder head screws (Fig. 13, Item 1) fromthe pump manifold (2) with a 3/8 inch hexagon sockethead wrench.4. Slide the pump manifold (2) and piston (3) forward untilthe 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. Unscrew retainer nut (5) from the pump manifold (2) andremove piston guide (6).7. Remove upper packing (7) and lower packing (8) from thepump manifold (2).4567281398. Clean pump manifold (2).9. Lubricate upper packing (7) and lower packing (8) withmachine grease.10. Insert upper packing (Fig. 14) with O-ring (1) andprotruding lip (2) downward.1211. Insert lower packing (Fig. 15) with the beveled edge (1)facing upward.112. Insert piston guide (Fig. 13, Item 6) into the retainer nut(5). Screw retainer nut (5) into the pump manifold (2) andtighten by hand.13. Push installation tool (included with the replacementpackings) for the piston (3) from above onto the piston.14. Lubricate installation tool and piston (3) with machinegrease.15. Guide piston (3) through the lower packings (8) into thepump manifold (2) from below. Using a rubber mallet,lightly tap the piston (3) from below until it can be seenabove the pump manifold.16. Remove installation tool from piston (3).17. Carefully tighten retainer nut (5) with adjusting wrench.18. Slide the top of the piston (3) into the T-slot (9) on theslider assembly (4).19. Position the pump manifold (2) underneath the gear unithousing and push up until it rests against the gear unithousing.20. Attach pump manifold (2) to the gear unit housing.21. Screw pump manifold (2) tightly to gear unit housing.22. Lubricate O-ring (Fig. 11, Item 6) between pump manifold(2) and inlet valve housing with machine grease. Screwinlet valve housing to the pump manifold.23. Insert the elbow on the siphon assembly into the bottomof the foot valve housing. Push the retaining clip up intothe groove inside the foot valve housing to secure thesiphon assembly in position. Place the return tube overthe return tube fitting and secure with the clip.24. Install front cover.