Wagner SprayTech 558044 User Manual

 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).