17
SERVICING / REPAIRS AT THE UNIT
ProSpray 20
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.
i
Make sure to check for grounding continuity
after service is performed on any electrical
components.
Use an ohmmeter to determine that there is
continuity between accessible dead-metal parts
of the product and the grounding blade of the
attachment plug.
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
7
5
4
2
3
6
