Anest Iwata MSU-323 C, Use And Maintenance Instruction Manual, Page: 22 / 32

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7.9 PUMP ROD DISASSEMBLY
1. Secure the suction main body (47), unscrew the suction tube (58) and slip it off.
2. Slip the rod (39) off from suction main body (47).
4. Loosen the adjustment nut (50) and unscrew the valve holder (56).
5. Remove the spacer, the adapters, the gaskets and the upper ball.
6. Unscrew the thinner cup (40) from the suction main body (47) and remove the spacer, the adapters and
the gaskets.
7. Unscrew the lower valve (61) from the suction tube (58) and remove the ball.
7.10 PUMP ROD RE-ASSEMBLY
1. Dip all components in the cleaning liquid and thoroughly clean them.
2. Make sure the rod (39) and the suction tube (58) are not damaged. If they show deep scratches in the sli-
ding areas, replace them.
3. Make sure the valve holder (56) and the lower valve (61) are not damaged, especially in the area in touch
with the ball. If any anomaly is found, replace them.
4. Whenever the pumping unit is completely disassembled, it is advisable to replace the following compo-
nents:
- 46 UPPER PACKING SET
- 54 LOWER PACKING SET
- 55 BALL
- 60 BALL
Moreover, check the wear conditions of all the other components and replace them if necessary.
NOTE: For models MSU 323 C TX and MSU 423 TX the two sets of gaskets (pos. 46 and pos. 54
pag. 25) can also be composed of 6 or 8 gaskets. As a matter of fact, replacing the spacer
(pos. 52 or 43 pag. 25) with a thinner one it is possible to locate 6 gaskets. While removing
the spacer (pos. 52 or 43 pag. 25) completely, it is possible to mount up to eight gaskets.
7.11 PUMP ROD RE-ASSEMBLY
Reverse the above mentioned procedure bearing in mind the following points:
1. Adjust the lower gaskets in order to obtain a “smooth sliding movement of the rod”.
NOTE: If the gaskets are too tight their duration shall result extremely reduced.
The regular and proper adjustment, together with suitable maintenance, ensures a long lasting duration
of the gaskets.
2. Do not use grease to lubricate the sliding parts of the pump rod, since it might compromise the following
painting operations.