TM 5-3810-300-24&P-3
1.3
CRANKSHAFT
The crankshaft (Figs. 1 and 2) is a one-piece steel
4. Remove all engine to base attaching bolts.
forging, heat-treated to ensure strength and durability.
Then, with a chain hoist and sling attached to the
All main and connecting rod bearing journal surfaces are
lifter brackets or eye bolts at each end of the
engine, remove the engine from the vehicle.
Complete static and dynamic balance of the crankshaft
5. Remove all of the accessories and assemblies
has been achieved by counterweights incorporated in the
with their attaching parts as necessary to permit
crankshaft.
the engine to be mounted on an overhaul stand.
The crankshaft end play is controlled by thrust washers
6. Mount the engine on an overhaul stand and
located at the rear main bearing cap of the engine. Full
fasten it securely to the mounting plate.
pressure lubrication to all connecting rod and main
bearings is provided by drilled passages within the
CAUTION:
Be absolutely sure the
crankshaft and cylinder block.
engine is securely attached to the stand
before releasing the lifting sling. Severe
Two dowels (Fig. 2) and six tapped holes are provided in
injury to personnel and destruction of
the rear end of the crankshaft for locating and attaching
engine parts will result if the engine
the flywheel. One hole is unequally spaced so that the
breaks away from the stand.
flywheel can be attached in only one position.
7. Remove the oil pan.
Each main bearing journal is 3-1/2" in diameter and each
connecting rod journal is 2-3/4" in diameter.
8. Remove the lubricating oil pump.
Remove Crankshaft
9. Remove the flywheel and flywheel housing.
10. Remove the crankshaft cap or pulley.
When removal of the crankshaft becomes necessary,
first remove the transmission, then proceed as follows:
11. Remove the vibration damper, if used.
1. Clean the exterior of the engine.
12. Remove the front engine support.
2. Drain the cooling system.
13. Remove the crankshaft front cover.
14. Remove the vibration damper inner cone or oil
seal spacer.
Fig. 1. Typical Six Cylinder Crankshaft
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