VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1912-1928 Camshaft Gear

Doing a rebuild on a 28 1-ton LP. Found a cam grinder to rebuild the cam, but during shipping the fiber gear got wacked, now junk. Got a new replacement, but metal (iron) assumably from an earlier model. My problem is the fit of the gear to the shaft. The fiber was a press fit, the new one is a "slip" fit. Not loose, but not tight. Makes me a bit nervous. Is this a normal fit for the iron gear?

No, this must be a fairly tight press fit. I would recommend you go with a fiber gear on the camshaft and the metal gear on the crank. The 1927 engine was just the opposite.

The big objection to the metal gear is the noise.

The loose gear can be corrected by knurling the cam shaft and the use of thread lock compound.

The cam gear is unique on the 1928 engine. The width must be the same as the crank gear.

Check timing mark on any gear you use as many were incorrectly marked.

COMMENT; It is too bad that most of my pictures were destroyed on the "School is in Session" by closing a web site without warning. Problems like this were covered in detail on that thread.

The gear is the correct width and I'm familiar with the correct marks and timing. The cam grinder provided the gear feeling it was his fault for the packaging. Makes it kind of hard to return. The noise shouldn't be a major problem, for a 1 ton truck. The crank gear is iron too. Would you replace the gear or use thread lock?