As part of my renewal of the brake system on my 1941 SD, I was able to remove the brake and clutch arms from the master cylinder by removing the special key. I'll be moving them to a new master cylinder. From the picture embedded (apologies for the link, but still learning how to post pictures), the groove on the shaft held what I thought was hardened up grease/gook/rubber (?)...is there some type of seal or bushing that goes into this groove? I wasn't able to find anything in the shop manual or online at Chevy's of the 40's...any thoughts on what goes here, if anything? Thanks
The groove is where the lock rides. I'd put a little grease in it. There is not much lateral pressure against the lands of the key. (I used "lands" to describe the parts of the key that go in the groove)
You can screw in a grease fitting at the outside of the access and pump the chamber full whenever you grease the car. Not really necessary but if it makes you feel better, do it.
I doubt there have been many failures of the bushings and/or the key owing to a lack of grease. This pivot area gets a work out only when braking or shifting. So not much.
Maybe some MC ccme with a grease fitting but I've never seen a NOS or even NOSR with one.
Best,
Charlie
BTW: I sent you a PM right after you posted that you were replacing the old MC and WCs.
Thanks Charlie! I appreciate the response and insights! I'll check the PM...I did see all the replies/posts to my earlier questions on my brake job...so I hope I picked it up. I'm still learning the ropes on the forum use, when to open a new thread, insertion of pics etc. I do try and do an exhaustive search first! Many more questions to come I'm sure, but the project is coming along well, thanks to this forum, the manuals etc. Much appreciated!
First, when one adds grease to a part that rotates, pivots etc, and then don't keep giving the part fresh grease to drive out the contaminated edge of the old, it may prove counterproductive over time. The old dirt roads we once traveled threw up dirt and grit that would get into joints etc. A good grease job allowed that old grease to be pushed a little so that the contaminated grease didn't act as an abrasive. That's why I said that I would put a little grease on the key but otherwise not grease the pivot points. Of course, if you are still a-courting taking a dirt road may necessary but probably not as much as it was back in the day. You know what I mean. No? Well, just forget it. Youngsters nowadays just don't know the mixed emotion of finding the perfect "parking place" only to worry about whether the battery was going to turn the engine over when it got time to take little Suzy home. (See below) Some of us still remember. Just saying.
Second: Yes, by all means get good at doing searches for past posts that may be helpful to you. Although many posts have shown me tricks to use to find the information I need, searching seems futile to me. Most times I get zip.
Almost everything about our old Chevrolets has been discussed from time to time. So the information is out there. I, however, don't see the harm in asking for information that has been discussed before. So, being new here to the Chat, if you need information don't hesitate to ask even it may exist in the fig newtons of physic or within the history of Chat.
