Joined: Feb 25, 2006 Posts: 345 Location: Wichita, KS
Posted: Sat Mar 15, 2014 4:40 pm Post subject: M38 major brake shoe adjustment help needed
Hi,
I need advise on adjusting the brake shoes on my M38. This may have been this way for a while, but I just noticed it while flat-towing my jeep to a gun show recently and finding the right-front drum extremely hot. I reviewed TM9-8012 and tried a "brake shoe adjustment (major)" but I cannot get the 0.005-inch clearance. I can only rotate the shoe anchor pin a very little bit before the drum locks up. In other words I do not have enough adjustment to move the shoe away from the drum to get the required clearance. I am assuming that until I get the lower pin adjusted correctly there is no need to try and adjust the upper pin.
Do I have the wrong shoes (the shoes do not have much wear on them)? Has it not been put together correctly sometime in the past? Is there something else I am missing?
Thanks for your help,
Kendall _________________ 1951 M38
1952 M38
1952 M38A1
1942 Dodge WC-55
1951 M100 trailer
1942 Ben Hur trailer
Do I have the wrong shoes (the shoes do not have much wear on them)? Has it not been put together correctly sometime in the past? Is there something else I am missing?
We could answer these questions if you posted photos of what you have for shoes, backing plates and drums.
This is what you should have:
_________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Feb 25, 2006 Posts: 345 Location: Wichita, KS
Posted: Sun Mar 16, 2014 1:09 pm Post subject:
You are right- it would help to see some photos of what my set-up is. I posted some in my photo album.
On the brake drum KH 2262 is stamped. The shoes are Bendix and 41486 is stamped on the shorter shoe.
I hope this helps. Thanks for the help,
Kendall[/url] _________________ 1951 M38
1952 M38
1952 M38A1
1942 Dodge WC-55
1951 M100 trailer
1942 Ben Hur trailer
It sounds like you have a wheel cylinder piston stuck. Pull your wheel off and see if you can push the pistons back in. Then have someone >>gently<< mash on the brake pedal and see id both pistons move. Don't go too far or the pistons will pop out. A piston on one side is probably stuck or very sluggish. _________________ Don Norris
Southeast, NC
53 CJ3B F134
59 Willys Pick-up truck
54 CJ3B is my M606 wanta-be in progress (rough)
M100 trailer
Joined: Feb 16, 2007 Posts: 206 Location: Gold Coast Australia
Posted: Thu Mar 27, 2014 1:39 pm Post subject:
Early Jeep Foot Brake Major adjustments made simple [diagram 1]:
Brake shoes must be concentric with drums. This can’t happen with skimmed drums & standard shoes [see diagram 2]
1. Turn all cam adjusters to fully retract all shoes
2. Turn all bottom anchor adjusters so dots [or arrows] face one another
3. Turn anchor in direction of arrow/s until the shoe heel/s drags on drum
4. Turn top cam/s in the arrow direction of the arrow/s to bring the shoe into contact with the drum. This will cause the shoe/s heel/s to lose contact with the drum
5. Turn the anchors again in the direction of the arrows until the shoe heel/s just drag on the drum/s again
6. Repeat step #4
7. Repeat step #3 & #4 until cam adjustment no longer frees the shoe/s heel. Then tighten the anchor bolt nut/s
8. Repeat procedure for all shoes if you have not already done so
Other methods that can be used to adjust shoes to concentricity with brake drum/hub not fitted
_________________ John GIBBINS
ASE Master Medium/Heavy Truck & Auto Technician 2002 USA
Licensed Motor Mechanic NSW # MVIC 49593 Current
YOU CAN'T TROUBLESHOOT WHAT YOU DON'T UNDERSTAND
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