Re: KPack

Posted by kevinpackard On 2021/4/10 22:41:49

Some progress today, but not as much as I wanted.

I cleaned all the parts for the driver rear brake. Sandblasted all hardware, repainted all of it, including the backing plate. Cleaned the drum from all the grease and oil as well.

The new brake shoes were checked against the old ones, and they are mostly a match. An extra hole, but that is no problem. The webbing is a bit thicker on the new shoes (as warned). I will need to thin out the areas that the adjusting screw and parking brake adapter fit. The wheel cylinder cleats fit fine.

Next I cleaned out all the old contaminated grease from the bearing on the driver side. It was pretty bad. But got everything out, cleaned and dried. Then packed new grease from the back until it oozed out the front.

Then I cleaned the bores in the axle housing and installed the new inner seal. I put a bit of gear oil on this seal because I had wiped off some of the oil on the shaft while handling it for bearing grease removal. Slid the axle back in, and tapped the bearing race in. After looking at it again and reading over the document David posted earlier, the race is supposed to move out against the backing plate. Once I cleaned everything up, the race was actually a tight fit, so I did not feel the need for knurling the inside of the housing.

Then I spent the next while trying to make sure I was doing the axle play measurements right. I made a measuring tool, and followed the instructions in the document. The passenger side had only a single thick shim, while the driver's side had two thick and two thin shims. I went ahead and moved the two thin shims to the passenger side to even out the shims as much as possible. Following the directions I ended up with ~0.006" of axle play according to my measurements. I measured both sides for kicks.

So both backing plates got installed and the bolts torqued to 35 ft/lbs.

Then I got a call from NAPA, saying that they were able to turn one of my rear drums, but the other one is warped and they can't turn it. Awesome.....so now I guess I get to find a new drum?

Frustrated, I turned my attention to something else. I made new brake lines for the rear axle and made a couple decent double flares. I cleaned up the diff breather and junction block as well. I'm pretty sure the clogged breather was the cause for the original axle seal failure. I made up most of the line from the rear to the front, but just need to finish one more flare.

So, now I need to find a drum before I can finish this.

-Kevin

Attach file:

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  New rear brakes shoes.jpg (166.24 KB)


  New rear brake shoes comparison.jpg (159.63 KB)


  Contaminated grease on axle.jpg (112.15 KB)


  Bearing cleaned.jpg (125.58 KB)


  Bearing repacked.jpg (100.29 KB)


  New inner seal.jpg (135.45 KB)


  Reinstalling driver axle.jpg (153.73 KB)


  Shims from driver side.jpg (135.86 KB)


  Axle play check tool.jpg (137.36 KB)


  Backing plates back on.jpg (146.58 KB)


  Learning how to double flare.jpg (91.90 KB)


  Clogged diff breather.jpg (111.63 KB)


  Breather and junction block, new lines.jpg (100.01 KB)