TM 9-4910-387-14-1
3
VACUUM PUMP (6).
a.
Loosen connector (7) using 3/4-in. open end wrench.
b.
Remove exhaust trap (8).
c.
Remove bolt assembly (9) using 5/8-in. open end wrench.
d.
Remove cap (10) and empty oil into an available minimum- size 1-
qt (0.95-1) container.
e.
Check jar (11) for damage; notify general support maintenance.
f.
Clean with cleaning compound (item 3, app C) using rag (item 14,
app C).
NOTE
Oil could vary from that stated below if test
in step h. has previously indicated that a
different weight should be used.
g.
Refill jar with oil (item 9, app C).
NOTE
Step h. will be necessary only at initial
installation or when the tester is moved to a
new location.
h.
Determine the correct operating oil weight for the exhaust trap by
taking a reading of the temperature of the surrounding area inside
the tester after 30 min. of operation. If the temperature reads 100
F (37.5 C) or above, use oil (item 10, app C); if the temperature
reads below 100F (37.5C), use oil (item 9, app C). Use that oil at
all times unless surroundings change, then repeat test.
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