Servicing; General Servicing; High-Pressure Hose; Repairs At The Unit - WAGNER ProSpray 3.25 Operating Manual

Servicing

10. Servicing
10.1

General servicing

Servicing of the unit should be carried out once annually by the
WAGNER service.
1. Check high-pressure hoses, device connecting line and
plug for damage.
2. Check the inlet valve, outlet valve and filter for wear.
10.2

High-pressure hose

Inspect the high-pressure hose visually for any notches or
bulges, in particular at the transition in the fittings. It must be
possible to turn the union nuts freely.
11.

Repairs at the unit

Switch the unit OFF.
Before all repair work: unplug the power plug
from the outlet.
11.1

Relief valve

1. Use a drift punch of 2 mm to remove the grooved pin (Fig.
12, 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
pump manifold (6).
4. Ensure that the seal (5) is seated correctly, then screw the
new 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 valve
handle (2) into alignment.
7. Insert the grooved pin (1) to secure the relief valve handle
in position.
Uncontrolled Copy
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11.2

Inlet and outlet valve

1. Remove the four screws in the front cover and then
remove the front cover.
Danger of crushing - do not reach with the
fingers or tool between the moving parts.
2. The piston rod will need to be in the lower stroke position:
a. Turn the pressure control knob to minimum pressure.
The DESC screen should say "PRIME".
b. Press the #1 key on the DESC control panel. The
"CREEP MODE" screen will now appear.
c. Slowly turn the pressure control knob clockwise to
increase the pressure. The crankshaft/slider assembly
will begin to move very slowly.
d. When it reaches the bottom, dead-center of its stroke,
turn the pressure control knob back to minimum
pressure. The crankshaft/slider assembly should stop.
3. Unplug the power plug from the outlet.
4. unit on high-rider cart:
Screw off the suction tube.
unit on stand / low boy cart:
Remove the retaining clip from the connecting bend at the
suction 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
on the material feed pump.
7. Remove the pusher stem clip and slide the pusher stem
housing (7) from the inlet valve housing (1).
8. Unscrew the inlet valve housing (Fig. 13, Item 1) from the
pump 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 inlet valve ball (4) for wear and replace the parts if
necessary. If the worn inlet valve seat (5) is unused on
one side, install it the other way round.
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Repairs at the unit
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ProSpray 3.25