Rear Drum Replacement today

[Greenleaf]

Guys,



I hope you are correct in saying that the drums are the same for the 350 and 250. I ordered 12"x3" drums and shoes from NAPA. Getting the seals and all the hardware inside the drums that hold the brakes.



I'm going to become worried if the 3" wide drums and shoes don't fit my D250.

I'll also need new studs too I suppose. I'd imagine the studs are different for 350 and 250. Anything else I'll need.



GL

 

[Greenleaf]

I also have new wheel cylinders and brake lines.



I hope all this works. Also found the axle socket tool at NAPA.



Scott

 

[csnider]

While you're in there. put in 1-1/8" wheel cylinders. . the 12X3s are the right size... .

 

[cerberusiam]

If you have the heavy duty axle with the deep drums it will work fine. The 3" drums fit everything from 68 to 91 with a 3" drum. The only differences were the the shoe and wheel cylinder sizes. They used them on all the heavy duties. If you have one of the lighter rears then you will have a problem as the drums are different. I have to think most of the later trucks like mine and yours all used the heavier stuff but you never know.



You should be able to reuse the wheel studs, I did mine anyway. I think the differece between the 1 ton and 3/4 is the stud diameter not the shoulder size.



The larger brakes and wheel cylinders made a noticeable difference on mine. Now its time for MC and RWAL overhaul as I have a leak down situation at stops. Always something.

 

[Greenleaf]

I have concerns about the oversized wheel cylinder(s) Be that as the MC is not changing and the size of the slave cylinder would.



I have new 1" cylinders and brake lines if I need them.



Cerb,I have read in past threads that a particular truck did not have the heavier duty rear axle what ever that would (or wouldn't) be. Mine is the 5450 lbs rating on the REAR and 4000lbs rating on the FRONT. I see that some 250's have HEAVIER axle ratings. I don't understand that.



Someone should post up a thread about axle ratings and we could post what OUR truck has. Be informative.



Scott

 

[Greenleaf]

Drums are shot... .....



Shoe lining material : MIA



Wheel Bearings : looks like someone took a die grinder to the outter bearing races. Inner roller/race look good enough for me.



Weekend Project... and then some Oo. Oo.



Stay tuned for next weekend's follies when fellow member Tugboat gets a new injection pump and replies;



... ..... "Holy Horse Dung"! ... ... . "I think I need to change my shorts"!



GL

 

[tugboatphil]

Taking TWO pairs of scivvies for the trip!!

 

[cerberusiam]

Wheel Bearings : looks like someone took a die grinder to the outter bearing races

Hey!!! Thats what my carrier and pinion bearings looked like ater 20k of a well known super-duty synthetic gear oil that was supposed to be better than sliced bread. Couple that with the pieces flaking off the ring gear and pinion I was not very impressed and decidedly unhappy. But thats another story.



The outer bearings always seem to take a beating worse than the inners. Too much pry and too much weight, eh? At least that what I figured was wrong with mine.



Weight ratings on these rears are just plain confusing. The book I used to look the parts up listed the 5500 lb (5450 on ours) 1968 thru 90 and 91 thru 93 6000 lb axle for the heavier drum that would take 3" shoes. The only difference is the numbers for the shoes, 2. 5 opposed to 3". Didn't break it down by 250 or 350. Originally tried to order by 250 and weight rating and got the lighter drums. The parts guy earned his pay to figure out what we needed and what it fit.



The book also listed the same master cylinder for all the applications 250/350 and the 1 1/8 cylinders. There was not another MC listed so must conclude they were the same. The only question I would have would be the proportioning valve but all seems to work right.



I doubt if there is enough volume difference between 1 and 1 1/8 cylinders to need a different MC, but who knows without testing.



Oh yeah, the only 6000 lb axle I know of is in the SW W350. The only difference I can see between them is springs. Much confusion at times.

 

[Forrest Nearing]

am I the only one who just throws new shoes on even if the drums are pretty gouged up? :-laf :-laf

 

[JLEONARD]

When I replaced my rear drums, which was the first week I owned the truck, one was totally shot... . so bad that even Forrest wouldn't waste shoes on it :-laf

The drums I ended up with were for a 6200 # axle... and here's the part number (Wagner) WAG BD60328 They have a raised area where the studs go thru... the drums for the 5500 # axle (which is what my door sticker said I had) were flat , or "normal looking".

Jay

 

[DieselBuzz]

Brakes?!

When I bought my truck one drum was so worn that the inner edge was cut off and resting in the backing plate :--) really. Yes, I know I am lucky to be here. Anyway, I made the switch to 1 1/8"cyls. and 3" shoes and drums and have not worried (about the back brakes at least) since.

Art

 

[Grey Wolf]

We had no problem using the larger shoes & wheel cylinders on my sons '90 and it stops way better than before

 

[Greenleaf]

Parts list.......

... ... continues to grow. I looked like Santa Clause when I whipped that sucker out in front of the NAPA counter-guys.



I should probably have installed speedi-sleeves on the axles, but that would be another $63. 00.



I'll put a list of part numbers together and cost's of this "very minor" repair.



BTW, the Napa salesman who calls on us here @ the bus barn, has gotten EVERYTHING right so far!!! Oo. Man! You gotta LUV that!! He did look at me funny when I told him I want 3 inch shoes. He told me he has worked at NAPA for 27 years. Sure as heck beats some college kid behind the counter #@$%!



GL

 

[Paychk]

. BTW, the Napa salesman who calls on us here @ the bus barn, has gotten EVERYTHING right so far!!! Oo. Man! You gotta LUV that!! He did look at me funny when I told him I want 3 inch shoes. He told me he has worked at NAPA for 27 years. Sure as heck beats some college kid behind the counter #@$%!



GL

That Parts Man is a keeper... not many of them left any more :{

 

[Grey Wolf]

Paychk,



Boy you've got that right, mine retired and half the time he never even looking in the book or the computer... .

 

[Greenleaf]

Parts List and COST

Composed a parts list and the cost of said repair/service. All NAPA part #'s



Shoes 3"-SS358 2. 5"-SS357 $40

Drums 440-1417 $82 each

Brake Cylinder 1" 4609025 and 4609026 $11. 50 each

Spring Pack 2243 $7. 25

Adjuster Cable 80808 $7. 50 each

Outter Bearing set BR38 $13. 50 per set

Hub Seal 28746 $4. 50 each

Wheel Studs 641-3207 $2. 27 a peice



I replace the lines (3/16") on the axle. Left side is 20" and right side is 48"



I lost a cup of gear oil each side.



I picked up a quart of DOT3 3. 00



Dana 70 bearing nut removal tool $31. 00



Grand Total $347. 84

 

[Greenleaf]

I made a correction to one of the above part numbers. The wheel seal should be 28746. I made the correction above. Sorry for any confusion.



Scott

 

[bgilbert]

Scott, which truck did you do this too?. . Did I just see a cat running?

 

[Greenleaf]

Bill,



I'd have to think about this for a moment... ... ... ... ...



I believe it was the '92?????



Yah. pretty sure it was the '92.



Now I have to do it all over again on another one. Hope it goes quicker this time.



Price one pays for the white tire smoke I guess.....





-S