DETROIT DIESEL 53
1.3
CRANKSHAFT
The crankshaft (Fig. 1) is a one-piece steel forging,
heat-treated to ensure strength and durability. All main
and connecting rod bearing journal and oil seal surfaces
are induction hardened.
Complete static and dynamic balance of the crankshaft
Remove Crankshaft
has been achieved by counterweights incorporated in
the crankshaft.
When removal of the crankshaft becomes necessary,
first remove the transmission, then proceed as follows:
The crankshaft end thrust is controlled by thrust washers
located at the rear main bearing cap of the engine. Full
1. Clean the exterior of the engine.
pressure lubrication to all connecting rod and main
bearings is provided by drilled passages within the
2. Drain the cooling system.
crankshaft and cylinder block.
3. Drain the engine crankcase.
Six tapped holes are provided in the rear end of the
crankshaft for attaching the flywheel.
4. Remove all engine to base attaching bolts; then with
a chain hoist and sling attached to the lifter brackets at
A crankshaft with splines at the front end is used. The
each end of the engine, remove the engine from its
engine uses a splined crankshaft pulley and pulley
base.
mounting components.
5. Remove all of the accessories and assemblies with
On the v-type engine the main bearing journals are 3-
their attaching parts as necessary to permit the engine
1/2" in diameter and the connecting rod journals are 2-
to be mounted on an overhaul stand.
3/4" in diameter.
1972 General Motors Corp.
February, 1972
SEC. 1.3 Page 1
