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Re: 1950 3100 parking brake
Jhyp #1349934 Sat Mar 14 2020 06:45 PM
Joined: Dec 2013
Posts: 848
Shop Shark
I'll be happy to re-measure any of the components as the camera angles certainly can be deceiving. The thing that bothers me about this matter is the amount of adjustment needed on the wheel cylinders to contact the brake drums for even a light drag. I have to wonder if the brake drums are past the service life spec of 281.7 mm or 11.090"?


Andy

His: 1947 Chevrolet 3104 [flic.kr]
Hers: 2008 American Saddlebred [flic.kr]

"A Jack of all trades is a master of none, but oftentimes better than a master of one." - Benjamin Franklin
Re: 1950 3100 parking brake
Jhyp #1349950 Sat Mar 14 2020 07:37 PM
Joined: Jun 2016
Posts: 179
J
Jhyp Offline OP
Shop Shark
Andy, I have asked Jim Carter and Chevy of the 40's to measure the ID of their new rear drums.

Re: 1950 3100 parking brake
Jhyp #1350429 Tue Mar 17 2020 11:43 PM
Joined: Jan 2010
Posts: 4,511
D
Shop Shark
Hope you get this sorted out

I drove my 50 for a short time with no parking brake
Kinda of a pain

Re: 1950 3100 parking brake
Jhyp #1352147 Sat Mar 28 2020 08:52 PM
Joined: Jun 2016
Posts: 179
J
Jhyp Offline OP
Shop Shark
Andy, here is the pic your requested. Getting a new rear drum on Tuesday. Hoping that solves the problem.

Attached Files
huck rear brake close up.png (3.52 MB, 136 downloads)
Re: 1950 3100 parking brake
Jhyp #1352393 Mon Mar 30 2020 01:21 PM
Joined: Sep 2011
Posts: 166
J
Shop Shark
I still do not see any "J" hooks and hold down springs! These are important. I also have issue with the reproduction adjusting caps on the wheel cylinders "cheesie tin" Use original cast caps. Jerry


Thank you,
Jerry
------------------------------------
Jerry's Body Shop #52
jerrysbodyshop@comcast.net
816-833-4414
------------------------------------
Re: 1950 3100 parking brake
Jhyp #1352460 Mon Mar 30 2020 08:25 PM
Joined: Jun 2016
Posts: 179
J
Jhyp Offline OP
Shop Shark
Andy
Here is a pic of the adjusted wheel cylinder after the new rear drum was installed. Adjuster on the wheel cylinder is still way to far out. :-(

Attached Files
wheel cylinder after new drums v2.png (2.79 MB, 98 downloads)
Re: 1950 3100 parking brake
jerryschevyparts #1352511 Tue Mar 31 2020 02:09 AM
Joined: Mar 2010
Posts: 9,228
5
Master Gabster
Originally Posted by jerryschevyparts
I still do not see any "J" hooks and hold down springs! These are important. I also have issue with the reproduction adjusting caps on the wheel cylinders "cheesie tin" Use original cast caps. Jerry
Not all years of Huck assemblies had the j-hooks and hold down springs. I am totally on board with you about the inferior tin foil reproduction caps.

Re: 1950 3100 parking brake
Jhyp #1352525 Tue Mar 31 2020 02:54 AM
Joined: Jun 2016
Posts: 179
J
Jhyp Offline OP
Shop Shark
Ok everyone here is my update. I have replaced my rear wheel cylinders, brake shoes and brake drums. All of that hoping to resolve the problem that when I adjust the wheel cylinders so there is a slight shoe drag on the drum the adjustment screws are way to far out considering everything is new (see pic above). I got all my parts from Classic Parts in MO. There is certainly something wrong with the either the wheel cylinder, the shoes or the drum. I am truly at a loss in solving this problem. I am down to welding tabs on the shoes where they interface with the adjustment screws to reduce the outward adjustment. Just can't figure out how this was set up in the factory.

Re: 1950 3100 parking brake
Jhyp #1352571 Tue Mar 31 2020 01:00 PM
Joined: Dec 2013
Posts: 848
Shop Shark
I can attest to Jon's attention to detail on his Huck style brake problem. This started out as a parking brake cable installation; however, it quickly turned into a brake problem. In order to get the parking brake functional the brake adjuster dilemma has to be resolved. You can see from the pictures Jon has posted, the amount of adjustment needed on the brake shoes/wheel cylinders to obtain a slight drag on the brake drums. The adjustment appears to be excessive, even with new shoes, wheel cylinders and drums.

About five years ago, I went through the same Huck brake rebuilding process. I replaced all lines, M/C, wheel cylinders, and brake shoes, albeit from another local vendor. The brake drums were good. My parking brake components were long gone. After I acquired the needed parts, all were assembled without any problems resulting in new Huck brakes and a functional parking brake.

Could reproduction parts be an issue, specifically the wheel cylinders? Have any of you Stovebolters experienced this problem? It seems odd to me that all new brake components result in the situation at hand. Let us know, we want to hear from you, thanks!


Andy

His: 1947 Chevrolet 3104 [flic.kr]
Hers: 2008 American Saddlebred [flic.kr]

"A Jack of all trades is a master of none, but oftentimes better than a master of one." - Benjamin Franklin
Re: 1950 3100 parking brake
Jhyp #1352656 Tue Mar 31 2020 11:31 PM
Joined: Mar 2010
Posts: 9,228
5
Master Gabster
OK, lets back waaaaay up. What is the history of this truck, specifically the rear axle and all of the parts associated with the brakes?
What did you throw out and replace?
For the geometry to be so far off for the wheel cylinder adjusters to be turned out so far to make contact with the drum, I have to wonder about the correctness of the parts attached to the bottom pivot pin, or the location of the holes in the backing plate for the two bolts down there.

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