Westerbeke 20B TWO Tehnical Manual page 44

Valve Camshaft Removal
1. When it is necessary to remove only the valve camshaft, use the following procedure.
a. Dismount the cylinder head assembly.
b. Pull out the push rods.
c. Pull out the tappets.
d. Remove the gear case assembly.
e. Remove the camshaft stopper bolt.
f. Draw the camshaft assembly out.
2. Removal of the injection pump camshaft.
a. Disconnect the injector lines.
b. Remove the injection pump assembly.
c. Remove the gear case assembly.
d. Remove the shaft rear cover.
e. Remove the stopper bolt.
f. Remove the shaft from the front of the engine.
Westerbeke Engines 42