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 TM 55-1905-221-14-4
6-36. TRANSMISSION OIL PUMP (Continued).
LOCATION/ITEM
ACTION
REMARKS
INSPECTION (Cont)
straight edge and a .0015 inch
(0.0038 cm) feeler blade should
be used as a "go" gage and a
.004 inch (0.010 cm) feeler be
used as "no go" gage. The end
clearance is by far the most
important clearance in the pump.
Too little end clearance will
possibly result in a severe
failure due to the lack of
an oil film between the rotor
set and the adjacent surfaces.
Too great an end clearance will
result in a low flow or weak
pump. Housing and rotor faces
must be flat and smooth when
checking this clearance.
Too great an end clearance will
result in a low flow or weak
pump. Housing and rotor faces
must be flat and smooth when
checking this clearance.
k. The tooth clearance between the
inner rotor (1) and outer rotor
(3) must be less than .008 inch
(0.020 cm). This clearance can
be measured with standard feeler
gages.
l. The clearance between the O.D.
of the outer rotor (3) and the
I.D. of the rotor cavity bushing
should be between .004 and .008
inch (0.010 and 0.020 cm); this
clearance is also measured with
standard feeler gages.
6-717
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