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ADJUSTING VALVE TAPPETS (O.H.V. ENGINE)

2. Tappet adjusting screw—with which adjustment is made, alter slightly loosening nut (3).

3. Tappet adjusting screw lock nut.

4. Tappet body.

5. Push rod cover keepers, (four)

expander sleeve, and remove keeper at upper end. Cover then telescopes.

As each tappet is readjusted, first make sure it is at its lowest position, by turning engine ahead until the like tappet in the other cylinder is at its highest position (valve fully open).

The intake valves are those nearest the carburetor.

Adjust tappets so push rods have just noticeable play or shake, and can be turned freely with finger tips, completely around without any trace of bind.

When reassembling push rod covers, make sure that both ends of covers are properly seated against cork washers.

Unless a tight seal is maintained, valve spring covers will be flooded with oil, resulting in a bad oil leak around cylinder heads and also fouled plugs from excessive oil passing through valve guides into cylinders.

Each push rod cover is sealed with three cork washers, one at each end and one below expander sleeve and spring. Renew these washers if they show even slight damage or when more than very slight oil leakage develops around them. See "Installing Push Rod Cover Cork Washers," Page 23.

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