WAGNER 0558001 ProSpray 3.23 Operating Manual

32 ProSpray 3.23GBServicing Repairs at the unit10. Servicing10.1 General servicingServicing of the unit should be carried out once annually by theWAGNER service.1. Check high-pressure hoses, device connecting line andplug for damage.2. Check the inlet valve, outlet valve and filter for wear.10.2 High-pressure hoseInspect the high-pressure hose visually for any notches orbulges, in particular at the transition in the fittings. It must bepossible to turn the union nuts freely.11. Repairs at the unitSwitch the unit OFF.Before all repair work: Unplug the power plugfrom the outlet.11.1 Relief valve1. Use a drift punch of 2 mm to remove the grooved pin (Fig.10, Item 1) from the relief valve handle (2).2. Remove the relief valve handle (2) and cam base (3).3. Using a wrench, remove the valve housing (4) from thepump manifold (6).4. Ensure that the seal (5) is seated correctly, then screw thenew valve housing (4) completely into the pump manifold(6). Tighten securely with a wrench.5. Align the cam base (3) with the hole in the pump manifold(6). Lubricate the cam base with grease and slide on thecam base.6. Bring the hole in the valve shaft (7) and in the relief valvehandle (2) into alignment.7. Insert the grooved pin (1) to secure the relief valve handlein position.374126511.2 Inlet and outlet valve1. Remove the four screws in the front cover and thenremove the front cover.2. Switch the unit ON and then OFF so that the piston rod ispositioned in the lower stroke position.Danger of crushing - do not reach with thefingers or tool between the moving parts.3. Unplug the power plug from the outlet.4. Remove the retaining clip from the connecting bend at thesuction hose and pull off the suction hose.5. Screw off the return hose.6. Swivel the unit 90° to the rear in order to work more easilyon the material feed pump.7. Remove the pusher stem clip and slide the pusher stemhousing (7) from the inlet valve housing (1).8. Unscrew the inlet valve housing (Fig. 11, Item 1) from thepump manifold.9. Remove the lower seal (2), lower ball guide (3), inlet valveball (4), inlet valve seat (5) and O-ring (6).10. Clean all the parts with the corresponding cleaning agent.Check the inlet valve housing (1), inlet valve seat (5)and inlet valve ball (4) for wear and replace the parts ifnecessary. If the worn inlet valve seat (5) is unused onone side, install it the other way round.456123711. Unscrew outlet valve housing (Fig. 12, Item 8) from thepiston (9) with adjusting wrench.12. Remove the upper ball cage (11), crush washer (10),outlet valve ball (12), and outlet valve seat (13).13. Clean all the parts with the corresponding cleaning agent.Check outlet valve housing (8), outlet valve seat (13),outlet valve ball (12), crush washer (10), and upper ballcage (11) for wear and replace parts if necessary. If theworn outlet valve seat (13) is unused on one side, install itthe other way round.14. Carry out installation in the reverse order. Lubricate O-ring(Fig. 11, Item 6) with machine grease and ensure properseating in the inlet valve housing (Fig. 11, Item 1).