Maintenance And Repairs - WAGNER POWERPAINTER 90 EXTRA Translation Of The Original Operating Instructions

PowerPainter 90 EXTRA

Maintenance and repairs

Before carrying out any work on the device, relieve the pressure and unplug the power plug from the socket.
Danger
a) Cleaning the inlet valve
If any problems occur when the paint is sucked up, the intake valve needs to be cleaned or serviced. Problems can
i
be avoided by cleaning and servicing the device properly.
1. Remove the suction hose and return tube.
2. Remove the inlet valve unit (fig. 28, 1) from the basic unit with an adjustable wrench. Visually inspect the inside and outside of
the inlet valve assembly. Clean any paint residue with the appropriate cleaning solution.
3. Replace inlet valve assembly by screwing it into the sprayer.
b) Servicing the pump
Description
Repair kit for piston pump (Pos. 5,6,7,8,9,10,11)
Repair kit for seals (Pos. 8,9)
Always wear protective eye wear while servicing the pump. Be sure to follow the Pressure Relief Procedure
when shutting the unit down for any purpose, including servicing or adjusting. After performing the Pressure
Relief Procedure, be sure to unplug the unit before servicing or adjusting. Area must be free of solvents and
Danger
paint fumes.
1. Remove the suction hose and return tube.
2. Remove the front cover and the 4 screws that secure it using a T20 Torx head driver.
3. Remove the yoke screw (1) and washer (2) that secures the dowel pin (3). The dowel pin connects the yoke (4) to the piston (5).
4. Using a pliers, pull the dowel pin out.
5. Rotate the pump shaft so the piston is in the top dead center position. Press the yoke (4) against the top nut (7) with a screwdriver,
for example. This is required to disassemble all the parts.
6. Unscrew the inlet valve unit (6) from the basic unit.
7. Remove the piston unit by pushing the piston (5) downwards.
8. Check the piston (5) and the seal unit (9) for wear and tear and replace parts if necessary.
9. Unscrew and remove the top nut (7) using and adjustable wrench.
10. Remove the upper seal (8) by pushing against the seal. Be sure not to scratch the housing where the seals are located.
11. Clean the area where the new seals are to be installed.
Assembly
1. Lubricate the new top seal (8) with Separating Oil or light household oil and by hand place the seal (with the open side facing
down) into the top port of the housing.
2. Take the new top nut (7) and apply some lubricant to the threads. Place the top nut into the top of the housing and tighten with
an adjustable wrench. This will drive the top seal into the correct position.
3. Lubricate the piston (5) and the seal unit (9) as described for the upper seal. Install the piston and seal unit in the lower part of
the housing.
4. Insert the insertion tool (10) and turn it firmly into the respective position, ensuring that the piston and seal are installed correctly.
Remove the insertion tool.
5. Align the piston (5) with the yoke (4). Be careful not to damage the piston.
6. Apply a bearing grease to the holes in the yoke where the dowel (3) is inserted.
7. Install the dowel pin (3) to connect the yoke to the piston. The piston may have to be moved up or down to do this.
8. Install the yoke screw (1) and washer (2) to secure the dowel pin.
9. Install the new O-ring (11) on the inlet valve assembly, lubricate with Separating Oil or light household oil, thread into the bottom
(inlet) of the housing, and tighten with an adjustable wrench.
10. Apply a few drops of Separating Oil or light household oil between the top nut (7) and piston (5). This will prolong the seal life.
11. Install front cover and 4 screws.
Repair kits (Fig. 29)
Order No.
2325 023
2324 303
GB
25