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ProSpray 20
4.2
INLET AND OUTLET VALVE
1. Remove the four screws in the front cover and then
remove the front cover.
2. Switch the unit ON and then OFF so that the piston rod is
positioned in the lower stroke position.
Danger of crushing - do not reach with the
fingers or tool between the moving parts.
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. Unscrew the inlet valve housing (Fig. 10, Item 1) from the
pump manifold.
8. Remove the lower seal (2), lower ball guide (3), inlet valve
ball (4), inlet valve seat (5) and O-ring (6).
9. Clean all the parts with the corresponding cleaning
agent.
Check the inlet valve housing (1), inlet valve seat (5)
and inlet valve ball (4) for wear and replace the parts if
necessary. If the worn inlet valve seat (5) is unused on
one side, install it the other way round.
2
3
4
5
6
1
10. Unscrew outlet valve housing (Fig. 11, Item 7) from the
piston (8) with adjusting wrench.
11. Remove the upper ball guide (10), crush washer (9) outlet
valve ball (11), and outlet valve seat (12).
12. Clean all the parts with the corresponding cleaning
agent. Check outlet valve housing (7), outlet valve seat
(12), outlet valve ball (11) and upper ball guide (10) for
wear and replace parts if necessary. If the worn outlet
valve seat (12) is unused on one side, install it the other
way round.
13. Carry out installation in the reverse order. Lubricate
O-ring (Fig. 9, Item 6) with machine grease and ensure
proper seating in the inlet valve housing (Fig. 10, Item 1).
GB
8
10
9
11
12
7
9
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