ProSpray 3.20
11
GB
Servicing
Repairs at the unit
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.
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 unit
Switch the unit OFF.
Before all repair work: Unplug the power plug from
the outlet.
11.1 Relief valve
Attention
The valve housing (4) should not be repaired. If
worn, it should always be replaced with a new one.
1. Use a drift punch of 2 mm to remove the grooved pin (Fig. 8,
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.
1
3
2
4
7
5
6
