Panhead Service - Tappet and Fuel Screens

Next up in the Panhead service manual is the two thousand mile service and with that, servicing the tappet screen. The tappet screen is a vital engine component. Especially on older Harley Davidson models that do not have an oil filter to strain out contaminants or debris. Remove the tappet screen plug with a drag link or a large screwdriver. Lift out the screen with a small pick. Then, separate the screen from the keyway by lining up the small notch and gently pulling apart. Clean the screen thoroughly and reassemble. Replace the tappet screen plug sealing washer if needed.

*Note: Some Panheads may have an added aftermarket oil filter assembly. This is a beneficial oil system add on. However, it is not original Harley Davidson equipment.*

Next in the Panhead service manual, Kevin moves onto the fuel filter screen. With the petcock turned off, Kevin unthreads the fuel screen assembly from the bottom side of the fuel strainer. The fuel screen is thoroughly cleaned and reinstalled. Replace the cork, copper, or rubber seal if needed.

The Panhead service manual tells us that the chain oiler adjusting screw is located on the face of the oil pump. It controls oil delivery to the primary chain. This tapered screw can be adjusted to deliver more or less oil to the primary chain. The Panhead Kevin is working on has been converted over to a (primary) belt drive. The oiler adjusting screw has been turned all of the way in. The tapered screw is seated. This turns the oiler off completely.

Next up in the Panhead service manual is the ignition points and timing. If the motorcycle is running well, this may not need to be any more than a visual inspection. If the timing was correctly set, it should not change for any reason. However, the points contacts and cam follower are prone to wear over time. Even under ideal running conditions. The factory Panhead service manual has specific instructions for setting timing and points gap. The instructed steps must be followed specifically for proper ignition timing and spark. Kevin brings up the bench to give a better view and more information on adjusting points.

Kevin wraps up with primary chain (or primary belt) adjustment and clutch adjustment.

Back to the Panhead Video Series