WAGNER ProSpray 3.21 0558019 Operating Manual

Also see for ProSpray 3.21: Owner's manual Owner's manual Operating manual Original operating manual Operating manual

WAGNER ProSpray 3.21 0558019 Operating Manual Manual pdf 14 page image

14 ProSpray 3.21GBServicing 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 and plugfor 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 or bulges, inparticular at the transition in the fittings. It must be possible to turnthe union nuts freely.i The risk of damage rises with the age of the high-pressure hose. Wagner recommends replacing high-pressure hoses after 6 years.11. Repairs at the unitSwitch the unit OFF.Before all repair work: unplug the power plug fromthe 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 the pumpmanifold (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 the cam 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 handle inposition.374126511.2 Inlet and outlet valve1. Remove the four screws in the front cover and then removethe 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 the fingers ortool 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 easily onthe 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 valve ball(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 inletvalve ball (4) for wear and replace the parts if necessary. If theworn inlet valve seat (5) is unused on one side, install it theother way round.456123711. Unscrew outlet valve housing (Fig. 12, Item 8) from the piston(9) with adjusting wrench.12. Remove the upper ball cage (11), crush washer (10), outletvalve 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), outletvalve ball (12), crush washer (10), and upper ball cage (11) forwear and replace parts if necessary. If the worn outlet valveseat (13) is unused on one side, install it the 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).