'44 Chevy CMP C15 Master Cylinder

[Harry Moon]

Originally Posted by Harry Moon

I bought the one that was new manufacture, Argentina, and it was off by a couple mm's as it was obviously manufactured to metric specs, took some work to install on the C60. I would buy the rebuild that requires a core.

A follow up on this master cylinder. It failed before I got on the road. There is a outlet at the end for the brake sensor and when you rotate the push rod to install or adjust the seal cuts itself on that opening. no way to avoid rotating the push rod. in addition it is a one inch bore which required a longer stroke or travel to the pedal. seemed to work fine but after adjusting it it started to fail. I recall the same damage to a similar later master cylinder adapted to another truck, same 1 1/4 master with the mounting holes on the side and I think back then the culprit was the same outlet on the side ripping the seal when it was being adjusted. So I have taken Grants suggestion and sent an original one off to Stoney Plain for sleeving and a Rebuild.