ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
Install key (12) in crankshaft (7) slot, and using driver (JDH-7), drive heated gear (11) onto crankshaft.
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 (MIL-L-2104) 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
tabs aligned in matching order. Make sure bearing tabs also match up before tightening capscrews.
Do not use pneumatic wrench to install main bearing capscrews, as damage may occur to the
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
Tighten all capscrews (1) to 85 ft-lbs (115 Nm).
Turn crankshaft (7) by hand. If it does not turn easily, disassemble parts and determine the cause.
Using pneumatic wrenches to install capscrews may cause damage to the threads. Never reuse
connecting rod capscrews.
Install connecting rod caps and bearings. Use new capscrews and tighten to specification, refer to paragraph 3-