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'51 Wheel Cylinder Issue #1250545
Fri Jan 12 2018 04:05 AM
Fri Jan 12 2018 04:05 AM
2
235Kidd  Offline OP
Shop Shark
Joined: Aug 2017
Posts: 108
Central Oklahoma
The brakes on the '51 6400 have always worked fantastic, until about last June.(Haven't drove it since July, though) The right front cylinder leaks a little bit, but never much. Today I drove the truck for the first time after the overhaul. The brakes worked fine for a little bit, but then I noticed a light squeaking noise. That right front wheel cylinder must be acting up, as when I felt the drum after parking it pretty soon after hearing the squeaking, it was too hot to touch for very long. Before I tear into it, what do you guys think could be the cause of the problem? Is that just what leaking cylinders do, stick?
I know it needs a new wheel cylinder, so that's in its near future. (By near I mean in the next couple months) It's not a daily driver, and I'll be back at college in a few days, so it'll be a while before I get to work on it.
Thanks
P.S.- I'm sorry if this has already been asked before. If it has, just post a link to the other thread. I tried doing a forum search, but I didn't find anything right away that mirrored my issue. Still getting used to the forum and all its features.


1951 Chevrolet 6400
Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1250597
Fri Jan 12 2018 04:12 PM
Fri Jan 12 2018 04:12 PM
R
rfs56trk  Offline
Shop Shark
Joined: Apr 2005
Posts: 1,509
Seal Beach, CA
Any leak in a brake system is something to be concerned about. When fluid gets on the lining it can cause the brakes to lock up.
Wheel cylinders also stick when they become cruddy inside. It could also have a collapsed brake hose which can cause a similar problem.
Fred

Last edited by rfs56trk; Fri Jan 12 2018 04:13 PM.
Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1250608
Fri Jan 12 2018 04:56 PM
Fri Jan 12 2018 04:56 PM
Achipmunk  Offline
Extreme Gabster
Joined: Dec 2001
Posts: 14,306
Boiling Springs, S. C. 29316
If it is a bonded shoe the boning may have come off and wedged in the drum. I'll bet you find out as soon as you pull the drum. The shoes, if original, can be purchased at the local auto parts store and fairly cheap. You may want to go ahead and buy a set. Do it once, do it right.


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Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1250792
Sat Jan 13 2018 05:06 PM
Sat Jan 13 2018 05:06 PM
Y
yar  Offline
Shop Shark
Joined: Mar 2010
Posts: 702
northern california
"The shoes, if original, can be purchased at the local auto parts store and fairly cheap."

Auto parts store linings have been "organic" (non-asbestos) since about 1980. Asbestos works vastly better and is abundant and inexpensive on ebay. When I took the "organic" friction off my '32 Ford roadster street rod and replaced it with asbestos it was like adding a booster and that is not an exaggeration.



Ray
Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1250999
Mon Jan 15 2018 02:55 AM
Mon Jan 15 2018 02:55 AM
2
235Kidd  Offline OP
Shop Shark
Joined: Aug 2017
Posts: 108
Central Oklahoma
Thanks guys. I'm back at school now, but I'll try to tear into it next weekend.


1951 Chevrolet 6400
Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1253868
Mon Feb 05 2018 10:57 PM
Mon Feb 05 2018 10:57 PM
2
235Kidd  Offline OP
Shop Shark
Joined: Aug 2017
Posts: 108
Central Oklahoma
Alright guys, I got the new wheel cylinder installed this weekend. Easy enough job! Only thing I'm questioning...the old one was 1 3/8" bore, and the new one is 1 1/4" bore. Will that hurt anything? Over the 8 miles I've driven since then, it's been working fine.


1951 Chevrolet 6400
Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1253873
Mon Feb 05 2018 11:28 PM
Mon Feb 05 2018 11:28 PM
Justhorsenround  Offline
Grease Monkey
Joined: Apr 2005
Posts: 5,972
Central, Oklahoma
235Kidd, check your PM’s.


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Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1253888
Tue Feb 06 2018 01:31 AM
Tue Feb 06 2018 01:31 AM
E
EdPruss  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,284
Longmont, CO
The smaller bore will make the brakes easier to push, at the expense of volume, so if there is enough volume, OK.

Ed


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Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1253990
Wed Feb 07 2018 01:46 AM
Wed Feb 07 2018 01:46 AM
truckernix  Offline
Master Gabster
Joined: Mar 2002
Posts: 8,641
Bracebridge Ontario Canada
I think we are talking about a wheel cylinder here. So if you are saying that one front cylinder has a different bore size than the other side, yes that is very bad. You don't want to drive it on the street that way.


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Re: '51 Wheel Cylinder Issue [Re: 235Kidd] #1254075
Wed Feb 07 2018 06:39 PM
Wed Feb 07 2018 06:39 PM
H
Hotrod Lincoln  Offline
Boltergeist
Joined: Feb 2004
Posts: 16,791
Dellrose, TN
The bigger cylinder will require more fluid volume to make it move, causing a low brake pedal, and once it gets applied, there will be a hard pull toward the cylinder with the bigger diameter due to more force being applied to the brake shoes by the bigger diameter cylinder. DO NOT DRIVE until you get the right cylinder installed.

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