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Technical Description
Scheduled Maintenance Cards
128/140 Dual Stage Rotary Vane Pumps User Manual/ 87-900-937-01(L)
NOTE
For a description of how to disassemble the discharge valves, see the
Unscheduled Maintenance Card No. 106.
4. Detach the end plate (61) from the rest of the pump body,
exerting leverage if necessary on the reference notches between
the parts. This will give you access to the retaining valve (56) and
associated spring (57) at the gas ballast inlet.
5. Disconnect the 2nd stage stator (58), remove the two vanes (42),
take the 2nd stage rotor (43) off the shaft and take out the key
(41).
6. Remove the partition wall (53) from between the 1st and 2nd
stages.
7. Detach the 1st stage stator (52) from the inner side (33), pressing
back on the springs (40) of the vanes (38) to avoid the vanes from
touching against the sharp corners of the body and becoming
damaged.
8. Take out the 1st stage rotor (39), the vanes (38) and the springs
(40).
9. Reassemble by proceeding in the inverse order.
NOTE
When reassembling, replace all the gaskets stripped down.
CAUTION!
After reassembly is complete, proceed to fill the pump again with oil following
the instructions of Unscheduled Maintenance Card No. 102.
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