24
AD
since 1928
AD
since 1928
1
2
3
4
5
6
7
9
5.1.2 - CHECK VALVES, SPRING AND SHAFT BUSHING
1) Remove the shaft (1) and unscrew the 2 hexagon screws (3) holding the check valve retainers (4) and the
shaft bushing (5).
2) Remove the retainers. If they are jammed use the shaft bushing (5) to push out on retainer. Turn the pump
housing and push the second retainer out.
3) Check the bushing (5) and replace if worn. Replace the check valves (6, 7) if they are worn or distorted. It
is recommended always to change the PTFE O-rings (8, 9) once the retainers have been removed.
5.1.3 - COVERS AND AIR DISTRIBUTION MECHANISM
1) Unscrew the 2 hexagon screws (1).
Lift out the washer (2) with the air outlet seal (3), plunge (7) and ball seat (6).
2) Take the O-ring out (4) and the ball (5).
Remove the ball seat (6), the plunge (7) and the air outlet seal (3).
Check the air outlet seal carefully.
Blow all channels (8) with compressed air.
AD Instruction Manual-2011EE-GB.indd 24
25/07/11 09:46
