WAGNER ProSpray 3.21 Original Operating Manual

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

16 ProSpray 3.29 • 3.31GBServicing 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. 11,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).4. Ensure that the seal (5) is seated correctly, then screw the newvalve housing (4) completely into the filter block (6). Tightensecurely with a wrench.5. Align the cam base (3) with the hole in the filter block (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.537642 111.2 Inlet and outlet valve1. Remove the four screws in the front cover and then removethe front cover.Danger of crushing - do not reach with the fingers ortool between the moving parts.2. Turn the pressure control knob to minimum pressure. TheDESC screen should say “PRIME”.3. Press the #1 key on the DESC control panel. The “CREEPMODE” screen will now appear.4. Slowly turn the pressure control knob clockwise to increasethe pressure. The crankshaft/slider assembly will begin tomove very slowly.5. When it reaches the bottom, dead-center of its stroke, turnthe pressure control knob back to minimum pressure. Thecrankshaft/slider assembly should stop.6. Unplug the power plug from the outlet.7. Pull off clamp on suction tube and remove return hose.8. Unscrew the connection hose (Fig. 12, item 1) from the high-pressure filter.9. Turn the knob on the side of the cart clockwise to unlock thecart. Tilt the cart backwards until it locks into place.10. Loosen and unscrew inlet valve housing (2) from the lowerhousing (3) with light blows from a hammer or unscrew withan adjusting wrench.11. Remove bearing ring (4), O-ring (5), O-ring (6), inlet valve seat(7), inlet valve ball (8) and upper ball guide (9).12. Clean all the parts with the corresponding cleaning agent.Check the inlet valve housing (2), inlet valve seat (7) and inletvalve ball (8) for wear and replace the parts if necessary. If theworn inlet valve seat (7) is unused on one side, install it theother way around.13. Carry out installation in the reverse order.Lubricate O-ring (5) with machine grease and ensure properseating in the inlet valve housing (2).139786542