Cleaning Pump Vanes

TM 5-6640-213-14

(5) Shut off the pump, remove the oulet filter assembly

and clean its components including the Chemistone filter element

(fig. 4-4) with solvent.

(6) Reassemble the pump and run it briefly to test. If

after flushing the pump still does not operate properly, the pump

vanes may need further cleaning.

Cleaning Pump Vanes.

Clean as vanes as follows:

(1) Remove the inlet oil cup and outlet filter and oil

pump assembly with a wrench.

(2) Detach the end plate by removing the six Phillips-

head screws on the front on the pump.

NOTE

Do not attempt to remove the rotor.

(3) Remove the four vanes from their slots in the rotor

(fig. 4-5), and wash them, the end plate and pump chamber with

solvent.

(4) Wipe the front of rotor with a lint-free cloth

moistened (not wet) with solvent.

(5) Air dry the components, then lubricate with SAE 10

pneumatic oil.

NOTE

Heavily abraded or unevenly worn edges or vanes

should be replaced.

(6) Before instaling cleaned or new vanes, not that one of

the long edges of the vane is notched by a shallow file mark. When

inserting vane in the rotor slot, the notched edge must face rotor

shaft.

A troubleshooting chart for the vacuum

Troubleshooting.

pump listed in table 4-4.

4-10.

DISTILLATION TEST APPARATUS.

To repair or replace a defective component on this apparatus,

proceed as follows:

Remove power cord from outlet.

b. Remove drawer that is under the apparatus by removing

attaching screw, washers and nuts (fig. 4-6) and lifting front of

drawer up and off drawer slides.

c. Free apparatus from counter top brackets by removing attach-

ing bolts, washers and nuts securing brackets to counter (fig. 4-7).