WAGNER ProSpray 3.39 Operating Manual

Also see for ProSpray 3.39: Original operating manual Operating manual

36 ProSpray 3.39GBServicing 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.13, 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 thenew valve housing (4) completely into the filter block (6).Tighten securely 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 cambase.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.537642 111.2 Inlet and outlet valve1. Remove the four screws in the front cover and thenremove the front cover.Danger of crushing - do not reach with thefingers or tool between the moving parts.2. Turn the pressure control knob to minimum pressure. TheDigi-Trac™ screen should say “PRIME”.3. Press the #1 key on the Digi-Trac™ control panel. The“CREEP MODE” screen will now appear.4. Slowly turn the pressure control knob clockwise toincrease the pressure. The crankshaft/slider assembly willbegin to move 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. 14, item 1) from thehigh-pressure filter.9. Turn the knob on the side of the cart clockwise to unlockthe cart. Tilt the cart backwards until it locks into place.10. Loosen and remove the inlet valve housing (2) from theupper housing.11. Remove bearing ring (3), O-ring (4), O-ring (5), inlet valveseat (6), inlet valve ball (7) and upper ball guide (8).12. Clean all the parts with the corresponding cleaning agent.Check the inlet valve housing (2), inlet valve seat (6)and inlet valve ball (7) for wear and replace the parts ifnecessary. If the worn inlet valve seat (6) is unused onone side, install it the other way around.1867543213. Screw out outlet valve housing (Fig 15, item 9) from thepiston (10) with 3/8 inch hexagon socket head wrench.14. Remove the upper seal (11), upper ball guide (12), outletvalve ball (13), washer (14) and outlet valve seating (15).