Bud’s

I currently have three of them, come June 1st I will have a total of four of them. Ratios are as follows: 2.2:1 x2 units…. 1.47:1 x1 unit…. 1.92:1 x1 unit… I am currently using one of the 2.2:1 ratio boxes currently on my R600. I purchased a lot of three of them, years ago.. I paid huge cash for these things….. let me know what you guys are thinking…. Rob@ 807-629-8424

I purchased this kit from Donnie at Global truck. My serial number doesn’t match the line card on my truck...... This kit is a complete conversion from stud pilot to hub pilot. 12000lbs front axle 38000lbs. rear bogey. Bearings,seals,drums all around,front and rear hubs,studs for dual aluminum in the rear and nuts,etc.... Located in ThunderBay,Ontario, Canada. Cost me $5500 Canadian funds. Make an offer. Rob.

@Timmyb What style of hub assemblies were you running on those axle housing’s? Stud pilot, spoke, hub pilot? You also mentioned on your 38,000 pound unit your inner bearing was a 598A And you’re outer is the hm617049/hm617010 combo. Any idea the number on the hub assembly that was on that particular axle? Thanks, Rob.

@Timmyb Any idea what the outer bearing numbers are?between your 38,000 pound and your 44,000 pound spindles?

@Timmyb If you don’t mind, that would be fantastic! Mack is telling me that this truck originally came with 44,000 pound rear ends. The original rear spring packs consisted of 11 leaf springs. Mack is Telling me the original number for the rear spring packs that came with it is 3QK5333P57

Would anybody know these part numbers that I posted? Those two emails came directly from Mack Manitoba,Located in Winnipeg. Any help would be much appreciated.

Yes Rob, I replaced the trunnion due to the fact that the shaft was completely worn out on my existing stand, they are bronze greaseable bushings. The original Mack Camelback spring packs have been replaced With aftermarket ones, hi did not look at the old ones as far as numbers being stamped on the T ends of the original packs. Global truck was able to find out the same information that the Mack dealer in Winnipeg told me. The carriers were swapped out by a old Mack dealer here in Thunderbay years ago. They removed the CRD/92/93 carriers that had a ratio of 4.42 and replace them with CRD/92/93 4.17 ratio carriers according to Mack Winnipeg . Both the front axle and both of the rear end axles were converted from spoke to stud pilot According to Mack Winnipeg.

Yes they are Mack top loaders CRD92 &CRD93 carriers 4.17 ratio camel back suspension 60” axle spread. @Rob where are you saying the information is on these axle housings? My top load carriers are stamped with their own information, i’m going to post a picture of the axle tag that I found on the housing, apparently a company called Hayes-Dana Inc. built these housings. serial#B310 144634 part #19QF5236 date-8/22/84 high strength steel

The seals that global sent me are SKF 42673 The OD fits, the ID of them is too small. The seals that are currently on my truck are 309-0960 which crosses over to an SKF 48000. The id is 4.75 and the od is 6.25. @Rob I found the stainless steel tag on the front rear end housing, but you’re saying that there will be stampings directly on the steel bowl of the axle housing itself?

My existing axles matched the new hubs that they sent me. Global sent me bearing sets 426 and 421

@6368 Is that rare? Is that why the bearings are oversized? You wouldn’t happen to know the hub number that matches up with these 44,000 pound housings would you?

Yeah..... I live here in northern Ontario, Canada the shipping is going to kill me sending this stuff back to Global in the US. I have searched the Internet high and low, have spoke to one mechanic and he figures that I can machine these hubs to fit the existing oversized cups and cones that are currently on my truck. It would be nice to know what the original inboard hub assembly part number is. I figured if anybody would know, it would be somebody on this forum. Mack built this truck with these rear ends in it, I can’t see it being the only truck in the world built like this. I did locate the original part number on the axle housing itself which is 19QF5236. The Inner bearing combination is set number 404,which isn’t bad as far as pricing. But the outer being Hm617049/HM617010 is ridiculously priced. Nothing has been easy for me when it comes to getting answers on this particular truck I have.

Hello there, I have a 1985 R688ST Econodyne, I recently had purchased a stud pilot to hub pilot conversion kit from Donnie at global truck sales, only to find out that the serial number on my truck does not match the line card on my truck. I soon found out that the bearing sizes Donnie sent me we’re too small after I tore the passenger side completely apart, I found out the spindle tube sizes were much larger than what the line card and Mack had told me. Once I realized the bearings and everything would not work I looked at the existing bearings that had came off with the hub assembly. My inner bearing is a 598A My outer bearing is a HM617049/HM617010 cone and cup Has anybody else came across this odd bearing combination? If so what is the proper hub for it? I have six bolt axles and I believe my rear ends are 44,000 pound. I cannot find any information on this odd bearing combo nor the proper hub part number. Any help with this would be greatly appreciated. Thanks,Rob.

The old Mack dealership here used to do a trunnion bar a week,2 days to tear down and two days to reassemble. Which entailed cutting out the stand ears Which the bar passed through,Pressing them off, pressing on the new bar, welding them back place etc.... The one mechanic told me that replacement stand is the way to go My saddles are finished along with the bar having excessive wear.

Thanks, I plan on running this truck for a long time, after talking to quite a few guys in the know it is a lot cheaper to fix this unit up rather than purchasing a new truck. Absolutely Rob, it’s almost over engineered, very heavy construction. I replaced the front leaf packs about eight months ago along with two new battery boxes, the covers on it right now are the old ones due to the amount of salt here in the winter. Going to be ordering up brand new air cleaner assembly and oil pan, along with a set of new main crank bearings. Slowly but surely.......

That’s where I initially found it on the Internet, went down to my local spring shop and he brought it in through one of his suppliers. I crunched some numbers and He was very reasonable with his prices, by the time I ordered it and then had to run down to the border to pick it up,pay the duty, along with the exchange rate I thought it was a pretty good deal. I recently did the rear spring packs this time last year, it would’ve been a good time to change it out then......

I definitely have my work cut out for me, I spoke to a couple of dog mechanics and they said it was about time somebody came up with the system such as this one, rather than having to slide unit Out the frame rails and then back in my problem is I am going to have a tough time installing it from the bottom up due to the 3000 gallon water tank that’s mounted on the back of the truck.

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