WAGNER ProSpray 3.21 0558019 Operating Manual

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WAGNER ProSpray 3.21 0558019 Operating Manual Manual pdf 15 page image

ProSpray 3.21 15GB Repairs at the unit111012139811.3 Packings1. Remove inlet valve housing in accordance with the steps inChapter 11.2, Page 14.2. 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 socket headwrench.4. Slide the pump manifold (2) and piston (3) forward until thepiston 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) and protrudinglip (2) downward.1211. Insert lower packing (Fig. 15) with the beveled edge (1) facingupward.112. Insert piston guide (Fig. 13, Item 6) into the retainer nut (5).Screw retainer nut (5) into the pump manifold (2) and tightenby 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 machine grease.15. Guide piston (3) through the lower packings (8) into the pumpmanifold (2) from below. Using a rubber mallet, lightly tap thepiston (3) from below until it can be seen above the pumpmanifold.16. Remove installation tool from piston (3).17. Carefully tighten retainer nut (5) with adjusting wrench