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Contributor
Location: Santa Cruz, CA | Hello all, I have (hopefully) attached a picture of the master cylinder push rod I just removed. I don't think this is the correct part and I was hoping someone out there can tell by looking at it.
The service manual shows a straight rod and this one is bent a full 90 degrees at the pin end and slightly on the rod end. Also the service manual shows the pin inserted from the passenger's side and this one was inserted from the drivers side. I suspect that this rod was replaced with the wrong one at some point in the past and I'd like to replace it with the correct part.
Back Story: The rod bound up in the master cylinder when the pedal went all the way to floor (which I know doesn't normally happen, but I'm trying to recover this unit after sitting for 20 years and there's obviously a blown wheel cylinder or hose somewhere which caused the fluid to leak out so the pedal went to the floor) Anyway, I couldn't extract the master cylinder as the rod was bound up inside and I couldn't extract the 5/8" pin on the brake pedal end as it was rusted in place so I built a puller and was able to break the master cylinder free from the rod (a new one is on order). Then I removed the whole brake pedal assembly and used a press to remove the rusted pin.
As always your help is much appreciated.
Many Thanks!
 (master cylinder push rod.JPG)
Attachments
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 master cylinder push rod.JPG (165KB - 86 downloads)
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Contributor
Location: Santa Cruz, CA | Trying again with the picture upload. Shortened the file name |
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Expert
 
Location: Cottage Grove, OR | Best way to do pictures on this site is to create an Album in the Photo Album section then put the pictures there. Then add you add pictures you can put a description of the photo and put a link in your forum post. Then all of your pictures will be in one place and we can follow your project. |
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Contributor
Location: Santa Cruz, CA | Trying again with the picture upload. Shortened the file name
 (mcpr.JPG)
Attachments
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mcpr.JPG (165KB - 8 downloads)
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Contributor
Location: Santa Cruz, CA | Yeah, the short file name didn't work either. Thanks Stephen. I created an album and here's the link to the pushrod pic. I'll get this figured out !
http://www.fmcowners.com/mbbs22/photos/show-album.asp?albumid=229&p...
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Expert
Location: Cottage Grove, OR | You are correct, that is not the correct push rod which makes everything else in the brake system suspect. Your would have originally had the small break system. But given what you found, things have been changed but we don’t know which ones. Start by checking your hydrovacs to see if your have the small ones (original to your coach) our the large ones. After that is determined, the proper master cylinder can be determined and after that, the proper push rod can be identified. |
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