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 Do I have to do anything special to center the brake backing plate on the spindle?Jump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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56D500boy |
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Expert 5K+ Posts: 9899      Location: Lower Mainland BC | . After investigating the AAJ and Scarebird front disc options for my 56 Dodge D500 with 56 Chrysler 12 x 2.5 center plane brakes, I am reinstalling the OE brakes until I finalize the selection of the kit that I am going to use and buy the needed calipers, etc. I want to drive the car again (it's been months)  I've cleaned and painted the backing plate and wheel cylinders (on the back side) over the last few days and was installing the assembly back on to the Chrysler spindle with the four OE bolts and nuts (that got cleaned, tapped and died), when I noticed that it seemed like there was some play in the location of the backing plate relative to the spindle axle center. Maybe it's nothing but I almost want to only barely snug the four bolts up and then temporarily install the drum and spin it, trying shift the backing plate and brake shoes, so every thing is concentric to the spindle axis. Then remove the drum and tighten the four bolts down to some spec (80 ft lbs??). Does this sound like a plan or is it unnecessary? The four bolts in the middle area of this old photo: Edited by 56D500boy 2022-03-09 11:37 PM | ||
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| Chrome58 |
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Expert Posts: 1316  Location: Belgium, 40 miles south of Brussels | |||
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| wizard |
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Board Moderator & Exner Expert 10K+ Posts: 13045 Location: Southern Sweden - Sturkö island | There's a description in the 1960 fsm that shows how to check the platform height within .010", especially if there has been noises from the brake shoes. The better the centration of the centerplane and dust shield, the better the brakes. I've been thinking of making a tool for to center the parts, still on the planning board..... (Service_Brakes_Fig_11.jpg) Attachments ----------------  Service_Brakes_Fig_11.jpg (171KB - 104 downloads) | ||
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| dels56 |
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Extreme Veteran Posts: 350 | |||
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| wizard |
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Board Moderator & Exner Expert 10K+ Posts: 13045 Location: Southern Sweden - Sturkö island | |||
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| 56D500boy |
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Expert 5K+ Posts: 9899 Location: Lower Mainland BC | . Thanks for the hints, guys. In lieu of a tool, I will use the brake drum as the guide and try to even out the gap between the drum and the backing plate. Hopefully that will center things nicely(ish). I don't need another reason for the brakes to lock up.  | ||
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| 56D500boy |
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Expert 5K+ Posts: 9899 Location: Lower Mainland BC | 56D500boy - 2022-03-10 11:43 AM. Thanks for the hints, guys. In lieu of a tool, I will use the brake drum as the guide and try to even out the gap between the drum and the backing plate. Well that did NOT work. The way that the drum sits *INTO* the backing plate makes it impossible to measure anything. Hence that factory tool (I guess).  So I backed off the four bolts holding the backing plate to the spindle and then just snugged them up. I then backed off the Center Plane brake shoes and then added the drum, the outer bearing, the washer and the spindle nut. I adjusted the nut so I was as tight as it could be and then I backed it off to the first castellated gap in the nut lined up with the cotter pin hole. I checked that drum spun decently, then I snugged both shoes, spinning the drum as I did so. Eventually, I got the shoes out as far as they could go (and locked the drum). Then I backed off the shoes a bunch. Then off came the spindle nut, the washer, the bearing and then the drum. Then I tightened the backing plate to spindle bolts (5/8" on the bolt head side facing me and 11/16" on the nut side) in kind of a star pattern. Then I replaced the drum, bearing, washer and nut and played with the shoe adjustment. Seems okay. That said, I don't like my previous use of White Lithium grease where the Center Plane shoe slips into the space in the two-layer support. Need to find proper LubriPlate. The white lithium I used seems too sticky at this point. Edited by 56D500boy 2022-03-10 11:04 PM | ||
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