TM 5-3895-346-14
CRANKSHAFT OIL SEALS
ENGINE OVERHAUL
2.
Coat the area of the shaft where the sleeve will be positioned with shellac or an equivalent sealant.
3.
Position the sleeve on the crank- shaft with the radius on the sleeve facing away from the engine.
4.
Drive the sleeve squarely on the shaft with front oil seal sleeve in- staller J 22524 and the
crankshaft pulley retaining bolt.
5.
Wipe off any excess sealant.
6.
Coat the outside diameter of the sleeve with engine oil.
NOTE
To remove a worn sleeve, peen the outside diameter of the sleeve until it stretches
sufficiently so it can be slipped off of the end of the crank-shaft.
Oil Seals
Current oil seals are made of an oil resistant synthetic rubber which is pre-lubricated with a special lubricant.
DO NOT REMOVE THIS LUBRICANT. Keep the sealing lip clean and free from scratches. In addition, a plastic
coating which acts as a sealant has been applied to the outer surf ace of the casing. Do not remove this
coating.
The rear oil seal may have either an open or closed back. Both types are serviced.
Install Crankshaft Front Oil Seal
1.
If the oil seal is not pre-coated, apply a non-hardening sealant to the periphery of the metal casing.
2.
Coat the lip of the new oil seal lightly with grease or vegetable shortening. Then position the seal
in the cover or outboard bearing support with the lip of the seal pointed toward the inner face of the cover or
bearing support.
3.
Place the cover or outboard bearing support in an arbor press (inner face down).
4.
On in-line engines, use installer J 9783 to press the oil seal into the cover until the seal is flush with
the outside face of the cover.
5.
Remove any excess sealant.
6.
Install the engine front cover or the outboard bearing support.
Install Crankshaft Rear Oil Seal
1.
Support the inner face of the flywheel housing in an arbor press or on a flat surface.
2.
If the new seal is not pre-coated, apply a nonhardening sealant to the periphery of the metal casing.
Then position the seal with the lip pointed toward the inner face of the housing.
3.
Coat the lip of the oil seal lightly with engine oil (single-lip seal) or vegetable shortening (double- lip
seal). Do not scratch or nick the sealing edge of the oil seal.
4.
Remove any excess sealant from the flywheel housing and the seal.
CAUTION
If the oil seal is of the type which incorporates a brass re- tainer in the inner diameter of the seal, be sure the
retainer is in place in the seal before installing the flywheel housing on the engine. If the retainer is left out, oil
leakage will result.
5.
Install the flywheel housing.
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