Wagner SprayTech 3.29 Manuel D’Utilisation

16

ProSpray 3.29 • 3.31

Servicing 

Repairs at the unit

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.

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.

 1.  Use a drift punch of 2 mm to remove the grooved pin (Fig.

11, 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.

  1.  Remove the four screws in the front cover and then 

remove the front cover.

  2.  Turn the pressure control knob to minimum pressure.  The 

DESC screen should say “PRIME”.

  3.  Press the #1 key on the DESC 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. 12, 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 unscrew inlet valve housing (2) from the lower 

housing (3) with light blows from a hammer or unscrew 

with an adjusting wrench.

  11.  Remove bearing ring (4), O-ring (5), O-ring (6), inlet valve 

seat (7), inlet valve ball (8) and upper ball guide (9).

  12.  Clean all the parts with the corresponding cleaning agent.

 

  Check the inlet valve housing (2), inlet valve seat (7) 

and inlet valve ball (8) for wear and replace the parts if 

necessary. If the worn inlet valve seat (7) is unused on 

one side, install it the other way around.

  13.  Carry out installation in the reverse order.

 

  Lubricate O-ring (5) with machine grease and ensure 

proper seating in the inlet valve housing (2).