17
EN
ProSpray 3.20
REPAIRS AT THE UNIT
12.2
INLET AND OUTLET VALVE
1.
Remove the screw that secures the pressure control knob.
Remove the knob.
Remove the three 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.
Switch the unit ON and then OFF so that the piston rod is
positioned in the lower stroke position.
3.
Unplug the power plug from the outlet.
4.
Remove the retaining clip from the connecting bend at
the suction hose and pull off the suction hose.
5.
Screw off the return hose.
6.
Swivel the unit 90° to the rear in order to work more
easily on the material feed pump.
7.
Remove the pusher stem clip and slide the pusher
housing (7) from the inlet valve housing (1).
1
3
4
5
6
7
2
8
8.
Unscrew the inlet valve housing (Fig. 10, Item 1) from the
pump manifold.
9.
Remove the lower ball guide (6), lower seal (5), inlet
valve ball (4), inlet valve seat (3) and O-ring (8).
10.
Clean all the parts with the corresponding cleaning
agent.
Check the inlet valve housing (1), inlet valve seat (3)
and inlet valve ball (4) for wear and replace the parts if
necessary.
11.
Unscrew outlet valve housing (Fig. 11, Item 9) from the
piston (10) with adjusting wrench.
12.
Remove the upper ball guide (14), crush washer (13),
outlet valve ball (12), and outlet valve seat (11).
13.
Clean all the parts with the corresponding cleaning
agent. Check outlet valve housing (9), outlet valve seat
(11), outlet valve ball (12) and upper ball guide (14) for
wear and replace parts if necessary.
14.
Carry out installation in the reverse order. Make sure
the outlet valve retainer (9) is reinstalled with the non-
threaded “lip” facing up into the piston. Lubricate O-ring
(Fig. 10, Item 8) with machine grease and ensure proper
seating in the inlet valve housing (Fig. 10, Item 1).
14
10
9
11
12
13
Summary of Contents for PROSPRAY 3.20
Page 67: ...67 ProSpray 3 20...
