TM 55-2840-231-23
2-6. Compressor - Installation - Continued
ENGINE - Continued
3. Turbine-to-Compressor
Coupling (33)
4. Compressor, Shims
(30A)
Lubricating oil (item 5, Appendix D)
Do not attempt to turn the gas
producer gear train using a
speed wrench at the tachometer
drive pad. Side loads on the
speed wrench could crack the
tachometer drive shaft.
Engine Turning Adapter, 6799790.
Lubricate with oil, the
adapter spur gearshaft
and-splines at-both ends
of turbine-to-compressor
coupling (33).
Position turbine-to-
compressor coupling (33)
on adapter spur
gearshaft. Determine the
number of shims required
for compressor
installation. The number
of .002 inch thick shims
required at each bolt hole
is marked on the rear
diffuser adjacent to the
hole (1 requires one .002
inch shim, 2 require two
.002 inch shims, etc.)
Compressor assemblies
without these numbers
shall be installed without
shims. Place the
compressor on the
gearbox with the required
shims in place at the bolt
pads. Use engine turning
adapter at starter-
generator pad to turn the
gas producer gear train
until it meshes with
adapter spur gearshaft.
2-20
Change 11
