Service Bulletin I-1 Valve Rocker Arm Shaft Lubrication

VALVE ROCKER ARM SHAFT LUBRICATION

The valve rocker arm shaft and bearing are lubricated by oil supplied under pressure from the oil pump through the oil transfer lines and metered rocker arm shaft screw to the rocker arm shaft and bearing.

When there is a sign of insufficient lubrication at the overhead valve mechanism, indicated by a squeak or other unusual noise, the oil transfer lines and rocker arm shaft screws must be checked.

• Oil transfer lines; With the engine running at idle speed, loosen each rocker arm shaft screw, one at a time, one-half turn, to make sure oil flows at each oil line fitting. If no oil bleeds from any one of the fittings when the screws are backed off as the engine is idling, the oil line is plugged. It will be necessary to remove the oil line and replace it with a line that is clear.
  Part #1,568003 Oil Transfer Line – Model 149
  Part #1, 568004 Oil Transfer Line – Model 249
• Rocker Arm Shaft Screw: When oil bleeds at all oil line fittings, it shows that lubrication is flowing up to each rocker arm shaft screw. To assure positive lubrication to the rocker arm shaft bearings and valve stems and push rods, remove each rocker arm shaft screw and grind or file a flat on the screw, as shown in the sketch below.
  NOTE: BE SURE TO INSPECT SHAFT SCREW GASKETS AND REPLACE IF NECESSARY.