TM 5-6115-400-35
(9) If the turbocharger meets the above
inspection specifications, it can be
reassembled and considered satisfactory
for further service.
(10) Install turbocharger on the engine. Refer
to TM 5-6115-400-12.
Note.
If undue impeller shaft bearing wear
or other damage is believed to have
been caused by lack of lubrication,
check the flow of oil to the
turbocharger
with
the
engine
running. Minimum oil pressure at
the turbocharger is 10 psi when oil
temperature is 180F.
c. Replacement Center Housing and Rotating
Assembly.
When complete disassembly of the
turbocharger is not feasible, a replacement center
housing and rotating parts assembly may be used (fig.
transfer the used turbine and compressor housings to
the new center housings and rotating parts assembly.
Follow the disassembly procedure outlined in paragraph
d. Assemble by following the instructions in paragraph f.
d. Disassembly of Turbocharger. Disassembly of
the Model T-1818 turbocharger can best be
accomplished with the use of service tools listed in table
2. Clean the exterior with a non-caustic cleaning
solvent. As parts are removed they should be placed in
Figure 31. Center housing and rotating assembly
protective containers on a clean bench in the order of
(4) Straighten tabs of lockplates and remove
disassembly. Always handle the parts with care to
capscrews and lock plates securing
prevent scratching the precision machined surfaces.
turbine housing to center housing. If
Check turbine wheel shaft radial movement with a dial
necessary, tap turbine housing with a soft
indicator and record the measurement obtained as this
hammer and remove from center housing.
will be required later to determine amount of bearing
(5) Record compressor and turbine shaft
bore wear in the bearing housing.
radial movement and the shaft end play.
(1) Mark relative positions of compressor and
Follow procedure as outlined in paragraph
turbine housings to the center housing
b.
(fig. 33A).
(6) Clamp holding fixture (tool A) in vise.
(2) Apply penetrating oil or diesel fuel to
Mount center housing and rotating
capscrews securing turbine housing to
assembly in holding fixture with turbine
center housing.
impeller downward Make certain the
(3) Remove capscrews, lockwashers, and
hexagon countersunk hole in turbine
clamps securing compressor housing to
impeller goes over hexagon protrusion of
center housing.
If necessary, tap
holding fixture to prevent the shaft from
compressor housing with a soft hammer
turning.
and remove from center housing.
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