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 has been achieved by counterweights incorporated in the
crankshaft.
The crankshaft end play is controlled by thrust washers located at the rear main bearing cap of the engine. Full pressure
lubrication to all connecting rod and main bearings is provided by drilled passages within the crankshaft and cylinder
block.
On In-Line engines, six tapped holes are provided in the rear end of the crankshaft for attaching the flywheel.
In-line engine main bearing journals are 3" in diameter and the connecting rod journals are 2-1/2" in diameter.
Remove Crankshaft
When removal of the crankshaft becomes necessary, first remove the transmission, then proceed as follows:
1.
Clean the exterior of the engine.
2.
Drain the cooling system.
3.
Drain the engine crankcase.
4. Remove all engine to base attaching bolts. Then, with a chain hoist and sling attached to the lifter brackets at each
end of the engine, remove the engine from its base.
Fig. 1 - Crankshaft Details and Relative Location of Parts (Three Cylinder In-Line Engine Crankshaft Shown)
November, 1973
SEC. 1.3
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