67RModel

Ok thanks for all the responses. I don’t have time to sit down and really digest all the info right now. I will get some pictures of the spindle and upload. I’m guessing this seal wasn’t installed properly with the correct tools. More to follow.

OK. How tight should the collar be? It slid off pretty easily with very little effort. Just a little wiggle and it slid right off, which would lead me to think it slid right on and no tool was required. Should there be a lot of friction between the collar and spindle? Perhaps is the wrong seal and collar for this application?

I have a leaking wheel seal on my drop axle. Axle is a 20,000lb non steerable Silent Drive, which I think is technically a Dexter axle now. Anyway, I tore it apart to change it and I found strange damage to the metal collar that slides onto the spindle first. The Seal is a Stemco 2110 Grit Guard. And the hub is a Webb 22.5 dayton spider hub. The failed wheel seal was only 1.5 years old and had less than 10,000 miles on it. What would cause the collar to get damaged like that? The seal itself pressed into the race looks completely fine (not visibly damaged) but obviously is seeping somewhere. Any thoughts?

I think if you give them enough $$ and enough time time they will do it. I think they have to have your old ones to work from though. They cant just make a set without a pattern.

Yes they can. They choose not to advertise it because it takes too long and ties up too much manufacturing space for other jobs I guess. They actually have a thread on the forum here of them doing it. Its several years old now.....

First I was thinking it was one of those Chrysler V8 deals since it looks like a light duty spec. Maybe an R400? The front hubs look almost like a medium duty weight rating. But the listing says diesel so I'm guessing its an 864 V8. If so, hopefully it runs and doesn't need anything major because I hear parts for those are basically non existent anymore.....

That dog should definitely be rescued. I think it will certainly follow you home LOL

Vicon Fabricating in Mentor, Ohio....a suburb of Cleveland.

Rather than do all that nonsense you could get brand new rails made. P.G. Adams in Maine or another outfit in Cleveland, Ohio I cant think of the name right now. Take your old rails there and get brand new ones with identical dimensions and hole locations.

Dont think so Bob. The DM frame has a much deeper web section of the channel and changes dimension significantly just ahead of the front drive axle. I'm not sure if the DM frames are splayed like the R model's are. So in short the frames themselves are very different. Could you make an R model cab, hood, and other components integrate onto a DM frame? Maybe. I think you will run into too many fitment issues. Practically my answer to the OP is "no".

Just go on Muncie’s website and use their PTO builder. Over a dozen options https://www.munciepower.com

Yes tubeless 24.5 rims will fit on your spokes. However, 11.00-22 tube type tires are still readily available. Check simpletire.com. They have a sumitomo and a chinesium brand in stock.

Kind of a shame given its relative rarity but I guess you cant save them all. I'm just happy I found a nice one a little while back and was able to save it. Mine has a V8 screamer in it though. I almost decided several times to drag this one home since it was close to me but I refrained. I guess mine is worth a few pennies more now 😂.

I saw this browsing Marketplace. No affiliation with the listing. Looks like a super nice little truck. Windshield needs some love. Can't beat the price either. @Joey Mack how far is Marion, NC from you? LOL. https://www.facebook.com/marketplace/item/1208157969832910/?ref=search&referral_code=null&referral_story_type=post

I saw this browsing Marketplace. No affiliation with the listing. I think a Mack B77 is a supercharged Cummins 335. Has to be a pretty rare beast. They say its all original so definitely probably worth the asking price if its not rotten. Certainly not your average B model here..... https://www.facebook.com/marketplace/item/737653184823210/?ref=search&referral_code=null&referral_story_type=post

Have you sent into the Mack Museum yet to get all the build information and data for it yet? The big packet of information they will send you is neat to have. It will tell you all the specs on how it was ordered, who ordered it, etc. They will provide all the serial numbers of the main components so you can tell if its a "numbers matching" truck. Not that any of that really matters but its just neat to know the history of the truck. Beast part is the information is basically free. They ask for a small donation but its not required.

Built in the Hayward, California assembly plant. They had some small differences and model designation numbers. Some of them had aluminum frames. Built for what the West Coast desired at the time. Most of them had Budd wheels in lieu of Daytons. Battery boxes were different. Things like that.

I don't know how old you are but if your first set made it 22 years there is a good chance that this might be the last set you will ever need...I guess that is one way to look at it. Not sure if its a positive outlook or not? LOL

There's build numbers published on this but I think a lot of R700s were built with Mack or Detroit V8s. Lots of "vendor engines" put into the 700 series R models. I think the holy grail would be to find one with a 1693 Cat or the big, purple Allis Chalmers engine if such animals were ever built....

I wonder what he means about the 12spd? "can hard drive"? Does that mean he cant drive it or its hard shifting due to a malfunction?

This is what the Facebook listing says for anyone who can't access it:

I don't think so. 6.0 Powerstrokes were mediocre at best bone stock or not, and 2003-2004s were just plain awful. EPA required lower emissions and Ford/Navistar were either not up to the challenge or just plain lazy. So many failed fuel pumps, blown head gaskets, failed EGR coolers, and hydrolocked engines. Really just plain junk. Any engine that needs $12,000-$15,000 worth of aftermarket "bulletproofing" or modifications to be made "good" is a literal boat anchor in my book. The best part was Ford/Navistar engineers know the engine had many design flaws and put it out anyway. Then came the 6.4. An even bigger POS. 2003-2010 was not a good time at all for Ford diesels. Speaking of 6.0 Powerstrokes and Insanity, check out the link below to a 2004 F450 that just sold on Wednesday on the auction site BringATrailer.com. Granted it has been in storage its whole life and only has 13 miles on it but some whacko literally paid $55,500 for it. BringATrailer typically has sky high prices because they sell mint condition classics and low mileage quirky vehicles. I don't know what the buyers fees are for that auction site but its typical to have a 10% buyers fee. So he possibly paid $61,000 for a 2004 F450 with a 6.0 Powerstroke. Bahahahahahahahahahaha. https://bringatrailer.com/listing/2004-ford-f450/#comments-anchor

I dunno. I can smell the cheap Chinese paint and packaging of that thing through the computer screen. I think I would rather stuff around with lighter fluid and binders than to put 125 psi in that tin foil pressure vessel. I wouldn't trust that PSV, the welds, or the tin foil that thing is made of.

I know this is non constructive to this thread but why are Mack ECMs essentially bricks until the dealer does something with them? Why is nobody in the aftermarket able to program them? I know there are dozens of reputable outfits and people that will take a Detroit DDEC III, or DDEC IV ECM of about the same era as this truck (DDEC IV) and make the engine do whatever you want it to do. It seems like with with Mack you are painted into a corner if something like this comes up.....