Drum brake expert help please
Laughing Gas
Joined: Dec 2020
Posts: 869
Likes: 186
From: Near my truck
Please accept my apologies for wasting your time. I'm an idiot. 
I didn't pay attention to detail and immediately assumed 2WD. Duh !
Study Flecker's pictures and comments.
Your cylinder pins do indeed seem to be wonky.
Also, check the shiny bit that sits around the pin which the springs attach to. Yours is upside down compared to Flecker's.
I didn't pay attention to detail and immediately assumed 2WD. Duh !
Study Flecker's pictures and comments.
Your cylinder pins do indeed seem to be wonky.
Also, check the shiny bit that sits around the pin which the springs attach to. Yours is upside down compared to Flecker's.
Cargo Master
Joined: Dec 2008
Posts: 3,222
Likes: 323
From: SW PA
1.) pulling to the right with steering wheel not turning - check rear brakes
2.) pulling to the right with steering wheel also turning - check front brakes
Which do you exhibit when you let go of the steering wheel and hit the brakes?
2.) pulling to the right with steering wheel also turning - check front brakes
Which do you exhibit when you let go of the steering wheel and hit the brakes?
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Senior User
Joined: May 2019
Posts: 175
Likes: 11
Driving with hands off steering wheel, braking sharply causes wheel to turn right.
More Turbo
Joined: Feb 2020
Posts: 633
Likes: 84
From: AL
I don't know that the part number is stamped on them, but it is entirely possible you got the wrong shoes for the applications, especially if you picked them up from a chain parts store. I have had really good luck with local independent stores, and also ordering from Rock Auto.
The pictures of the right sight potentially explain the problem. As stated, it seems they are doing most of the braking work.
The pictures of the right sight potentially explain the problem. As stated, it seems they are doing most of the braking work.
More Turbo
Joined: Jan 2021
Posts: 603
Likes: 172
From: Flo-rida
Maybe I missed it and if so sorry but verified that the problem os not with the right but maybe the left is not working causing the right only to grab causing the pull/dive to the right and wheel turning.
Hotshot
Joined: Feb 2004
Posts: 10,865
Likes: 2,624
From: The Shenandoah Valley
Look at Flecker's photos, easy to see his front most shoes are shorter lining ... look at lining as relates to the end near the adjuster. Looking at yours, all 4 shoes look the same. It's almost like somebody came in to a store and open boxes up to compare, then mixed the contents up trying to put 4 long shoes in one box, and 4 short shoes likely in some other box. ... then the boxes got put back on the shelf. I've seen it unfold and interrupted guys before at my store. At first look I thought you had put both long shoes on the left, but then I saw your other side photo.
Hoses bear inspection too, Bleeding is important if air is suspected, and adjustment. I install drums when I've adjusted enough to slide drums over shoes, then tighten up manually to a tight but moveable place, then I back off to get just a scraping sound as I rotate the drum.
I don't recall seeing drum brakes with same size shoes front and rear though. The shorter shoe gets pulled away from the anchor under application and is pushed towards the adjuster which pushes the other shoe in tight to the anchor.
Hoses bear inspection too, Bleeding is important if air is suspected, and adjustment. I install drums when I've adjusted enough to slide drums over shoes, then tighten up manually to a tight but moveable place, then I back off to get just a scraping sound as I rotate the drum.
I don't recall seeing drum brakes with same size shoes front and rear though. The shorter shoe gets pulled away from the anchor under application and is pushed towards the adjuster which pushes the other shoe in tight to the anchor.
Last edited by tbear853; Jun 25, 2021 at 07:42 PM. Reason: spelling
Thread Starter
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Senior User
Joined: May 2019
Posts: 175
Likes: 11
Look at Flecker's photos, easy to see his front most shoes are shorter lining ... look at lining as relates to she end near the adjuster. Looking at yours, all 4 shoes look the same. It's almost like somebody came in to a store and open boxes up to compare, then mixed the contents up trying to put 4 long shoes in one box, and 4 short shoes likely in some other box. ... then the boxes got put back on the shelf. I've seen it unfold and interrupted guys before at my store. At first look I thought you had put both long shoes on the left, but then I saw your other side photo.
Hoses bear inspection too, Bleeding is important if air is suspected, and adjustment. I install drums when I've adjusted enough to slide drums over shoes, then tighten up manually to a tight but moveable place, then I back off to get just a scraping sound as I rotate the drum.
I don't recall seeing drum brakes with same size shoes front and rear though. The shorter shoe gets pulled away from the anchor under application and is pushed towards the adjuster which pushes the other shoe in tight to the anchor.
Hoses bear inspection too, Bleeding is important if air is suspected, and adjustment. I install drums when I've adjusted enough to slide drums over shoes, then tighten up manually to a tight but moveable place, then I back off to get just a scraping sound as I rotate the drum.
I don't recall seeing drum brakes with same size shoes front and rear though. The shorter shoe gets pulled away from the anchor under application and is pushed towards the adjuster which pushes the other shoe in tight to the anchor.
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Laughing Gas
Joined: Apr 2016
Posts: 862
Likes: 120
From: Buffalo NY
tbear853 is right. The shoes in #1 and #7 all appear to be secondary(longer) shoes. They could have been boxed wrong at the factory. The shoes in pic #5 show a primary (shorter) and secondary(longer) shoe.. The primary shoe always goes toward the front of the vehicle. There is no 2WD shoe,73-79 F100/150 2WD trucks were equipped with front disc brakes. Some good videos;check out "types of drum brake systems".https://www.brakepartsinc.com/raybes...to-videos.html
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Senior User
Joined: May 2019
Posts: 175
Likes: 11
tbear853 is right. The shoes in #1 and #7 all appear to be secondary(longer) shoes. They could have been boxed wrong at the factory. The shoes in pic #5 show a primary (shorter) and secondary(longer) shoe.. The primary shoe always goes toward the front of the vehicle. There is no 2WD shoe,73-79 F100/150 2WD trucks were equipped with front disc brakes. Some good videos;check out "types of drum brake systems".https://www.brakepartsinc.com/raybes...to-videos.html
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