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Oil In The Air Cleaner


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HD Tech Bulletin
November 6, 2000

TC-88 Oil Pump Alignment

It has been observed that some TC-88 engines are experiencing oil in the air cleaner when the vehicle is driven at high speeds. The correction for this condition is to align the oil pump. This is accomplished using the Evo2 tappet block alignment screws, Part Number HD-33443. The procedure is as follows:

1. Loosen all pump assembly mounting screws.
2. Remove two screws diagonal to each other.
3. Install the tappet block alignment screws in these two positions.
4. Torque the remaining screws to spec..
5. Remove the alignment screws/tools.
6. Install the previously removed screws and torque them to spec..

NOTE: This procedure must be performed anytime an oil pump is removed and reinstalled. This will ensure proper oil pump function.