ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
When installing gear, do not gouge or nick crankshaft flange or wear sleeve.
Place gear on crankshaft flange. Be sure woodruff key (9) is properly aligned with keyway
in gear (8).
Install Installer over adapter.
Tighten nut clockwise until gear firmly seats against crankshaft flange. Allow gear to cool
before removing installer.
Install main bearing (6) inserts. Make sure that tang on inserts is engaged with slot in engine block
and main bearing caps. Also make sure that oil holes line up with oil passages in block.
If new thrust bearing inserts or thrust bearing washers are installed, they
must be installed as a set.
Install main thrust bearing (5) in rear web of engine block.
Apply a liberal coating of clean engine lubricating oil to bearing surfaces and crankshaft journals.
Using proper lifting equipment, lower crankshaft (7) onto main bearings.
Dip entire bearing capscrews (1) in clean engine lubricating oil (MIL-L-2104) and position them in
the main bearing caps. Apply a liberal amount of oil to bearing inserts in caps.
Make sure bearing caps are installed on the bearing bosses from which they
were removed. The numbers stamped on the caps should be on the same
side as the numbers on the block. If there is an arrow on cap, arrow must
point toward camshaft side of block.
Install each bearing cap (3 and 4), bearings (5 and 6), and capscrews (1) with washers (2) with the
recesses and tags aligned in matching order. Make sure bearing tabs also match up before
Do not use pneumatic wrench to install main bearing capscrews, as damage
may occur to the threads.
Before tightening capscrews on main bearing caps, align upper and lower thrust washers or flanges
on main thrust bearings (5). Using a soft-face hammer, tap crankshaft to the rear and then to the
front to line up thrust bearing surfaces.
Tighten all capscrews to values in Table 5-5.