WAGNER P20 0552488 - Inlet and Outlet Valve Maintenance

14 P20
GB
Repairs at the unit
11.2 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 ngers 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 o the suction hose.
5. Screw o 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.9,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.10,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. 9, Item 1).
9
10
11
12
8
7