B3.9 and B5.9 Series Engines
Section 1 - Cylinder Block - Group 01
Anytime a new camshaft is installed, new tappets and
push tubes must be installed to prevent damage to the
camshaft and tappet surfaces.
The camshaft lobes can be inspected after removing the oil
pan. Also, the face of the tappets can be inspected after
removing the push tubes and lifting the tappets.
A severely damaged camshaft journal(s) can generate small
metal particles that can be found in the oil pan and oil filter.
These metal particles will also be indicated as iron in the
oil analysis. As the clearance in the journal(s) increases, a
small decrease in oil pressure can be detected.
Camshaft Gear Installation/Removal Tool, Part No.
The camshaft end clearance is determined by the clear-
ance between the camshaft and the thrust plate. The cam-
shaft gear must be removed to adjust the camshaft end
NOTE: The camshaft does not have to be removed to
remove the camshaft gear. Use the the camshaft installa-
tion and removal tool, Part No. 3823589.
Camshafts that are damaged, worn on the fuel transfer
pump lobe or the valve lobes must be replaced. Cummins
Engine Co., Inc. does not recommend grinding camshaft