Crankshaft rear oil seal arrangement for engines which use a wet back end
A new arrangement for the crankshaft rear oil seal has been introduced for engines which use a wet back end. This arrangement uses two lip seals which are narrower than the standard seal and operate back to back on the crankshaft palm.
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The front seal (A9) prevents leakage of oil from the engine and the rear seal (A7) prevents leakage of oil from the flywheel housing. A cover (A4) and joint (A2) are used to prevent leakage of oil past the setscrews which retain the flywheel housing (A1) to the rear face of the cylinder block. An O-ring (A6) is used to seal between the cover and the seal housing.
Oil leakage past the O-ring or one of the oil seals will pass through a hole in the seal housing between the two seals.
The oil will then pass through two cast grooves in the front face of the flywheel housing. These grooves are in the 4 o
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