Servicing; General Servicing; High-Pressure Hose; Repairs At The Unit - WAGNER ProSpray 3.39 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.
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 the
new 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 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.
5
4
3
2
1
7
GB
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. Turn the pressure control knob to minimum pressure. The
Digi-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 to
increase the pressure. The crankshaft/slider assembly will
begin to move very slowly.
5. 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.
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 the
high-pressure filter.
9. Turn the knob on the side of the cart clockwise to unlock
the cart. Tilt the cart backwards until it locks into place.
10. Loosen and remove the inlet valve housing (2) from the
upper housing.
11. Remove bearing ring (3), O-ring (4), O-ring (5), inlet valve
seat (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 if
necessary. If the worn inlet valve seat (6) is unused on
one side, install it the other way around.
1
6
13. Screw out outlet valve housing (Fig 15, item 9) from the
piston (10) with 3/8 inch hexagon socket head wrench.
14. Remove the upper seal (11), upper ball guide (12), outlet
valve ball (13), washer (14) and outlet valve seating (15).
36
Repairs at the unit
8
7
6
5
4
3
2
ProSpray 3.39