Popular Post reb87 Posted December 29, 2024 Popular Post Share Posted December 29, 2024 My son and I just got back to Nebraska from Denver with my new to me and also first Mack truck. I bought it at Richie bros auction so I don’t have any info from previous owners. There isn’t any id tags that I can find anywhere and it has a new id plate and title issued from the state of Colorado. I watched the truck sell on “bring a trailer” a year ago for 11000$. The vin LJ2DX5210D was listed and shown on a homemade metal tag which is probably why a new number was issued. I did a Quick Look but didn’t see any numbers stamped into the frame to see what the original is. Any advice on where to look? The frame has a lot of yellow under the red paint so I’m guessing it was a state or county road dept truck originally. Has a turbo charged Cummins with no id tag, and a five speed with 4 speed aux transmission, I doubt any of that drivetrain is original, the aux shifter comes up right behind the throttle pedal and kinda locks your foot in there. I drove the truck the 450 miles home on the interstate and got up to 72 mph (2100) and settled on 65 at about 1900 for the drive. Truck had lots of power and drove nice. I was without alternator , the batteries were hooked up positive ground which I’m pretty sure is backwards as it had a ford car alternator on it that wasn’t charging. I’m planning on pulling the wrecker stuff and winch off and fixing this truck up for a fun truck and hauling a little corn occasionally with it. 4 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/ Share on other sites More sharing options...
Popular Post reb87 Posted December 30, 2024 Author Popular Post Share Posted December 30, 2024 The radiator is plumbed into the top tube of the bumper. Driving home it was nice and warm whenever I climbed up to check the engine! 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564956 Share on other sites More sharing options...
reb87 Posted December 30, 2024 Author Share Posted December 30, 2024 Here are some shots of the engine if anybody knows how to Id it 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564958 Share on other sites More sharing options...
Popular Post reb87 Posted December 30, 2024 Author Popular Post Share Posted December 30, 2024 6 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564959 Share on other sites More sharing options...
Popular Post reb87 Posted December 30, 2024 Author Popular Post Share Posted December 30, 2024 4 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564960 Share on other sites More sharing options...
Popular Post reb87 Posted December 30, 2024 Author Popular Post Share Posted December 30, 2024 The rear axles, can anyone decipher them? Do they have a power divider? 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564961 Share on other sites More sharing options...
Popular Post Joey Mack Posted December 30, 2024 Popular Post Share Posted December 30, 2024 CRD 93 is the rear drive, the front will be CRD 92- the input on the front drive is where the power divider is. Your pictures are good, just need the front of the front drive.. great find !!! 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564962 Share on other sites More sharing options...
Joey Mack Posted December 30, 2024 Share Posted December 30, 2024 I dont see the ratio stamped in that area. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564963 Share on other sites More sharing options...
Popular Post mowerman Posted December 30, 2024 Popular Post Share Posted December 30, 2024 Yeah, great score. I’m thinking you have a browning auxiliary. I’m sure other guys will chime in. Thanks for all the photos. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564964 Share on other sites More sharing options...
Popular Post Brocky Posted December 30, 2024 Popular Post Share Posted December 30, 2024 (edited) That is a great find!!!! I am a big fan of oilfield trucks!! If you are planning on pulling a grain trailer, go ahead and remove the wrecker lift from the back, BUT I would leave the headache rack and the winch on it!! You might have to pull a combine out of the mud one day!!! The engine is a Cummins, with compression release and Jakes, Since there is no plate on the auxiliary drive, or I am looking at the wrong picture(??), it is hard to tell??? Look on the drivers side front of the engine at about 4 o'clock for the aux drive.. It should have a plate on it showing engine specs. I do NOT see any injectors on the side of the heads so it should be an 855 CI engine. Possibility a 290 or 335?? With all the extra switches under the dash you might be right of it being municipal in the past??? Sorry I can not help more, but I am sure you will get more responses.. Edited December 30, 2024 by Brocky 6 Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564966 Share on other sites More sharing options...
Popular Post Joseph Cummings Posted December 30, 2024 Popular Post Share Posted December 30, 2024 The crd 92 and 93 are later production than the axle housings. Notice the missing bolt? There is no hole under it. They fit, but you had to skip a couple holes. I did it on a few, and never had a problem 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564967 Share on other sites More sharing options...
Joseph Cummings Posted December 30, 2024 Share Posted December 30, 2024 6 minutes ago, Brocky said: Possibility a 290 or 335 I was thinking 290, the 335 should have an aftercooler 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564968 Share on other sites More sharing options...
reb87 Posted December 30, 2024 Author Share Posted December 30, 2024 I did notice that, wondered why there wasn’t a threaded hole underneath! Thanks. I’m guessing the ratio is stamped by the R? Says 7.00. Seems pretty low to hit 72mph with 11-24.5 tires. Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564969 Share on other sites More sharing options...
reb87 Posted December 30, 2024 Author Share Posted December 30, 2024 No plate on the aux drive for the Cummins. Always kind of irritating when people remove that stuff. Ever seen the radiator plumbed into the bumper like that? Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564970 Share on other sites More sharing options...
Joseph Cummings Posted December 30, 2024 Share Posted December 30, 2024 3 minutes ago, reb87 said: I did notice that, wondered why there wasn’t a threaded hole underneath! Thanks. I’m guessing the ratio is stamped by the R? Says 7.00. Seems pretty low to hit 72mph with 11-24.5 tires. If that aux trans has an overdrive of about 0.66 to 1 that would get you to 70 something on 11r24.5s 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564971 Share on other sites More sharing options...
Brocky Posted December 30, 2024 Share Posted December 30, 2024 3 minutes ago, reb87 said: No plate on the aux drive for the Cummins. Always kind of irritating when people remove that stuff. Ever seen the radiator plumbed into the bumper like that? NO!!! But someone must have thought it would be some extra cooling??? The oilfield welders were artists at creating front protection!!!! 1 Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564972 Share on other sites More sharing options...
h67st Posted December 30, 2024 Share Posted December 30, 2024 That looks to be a small cam Cummins, my 335 doesn't have an aftercooler so that may be what you have. I used to work on big cam 290's back in the 80s, did they make a small cam 290? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564973 Share on other sites More sharing options...
reb87 Posted December 30, 2024 Author Share Posted December 30, 2024 I appreciate the replies here! Is there an engine serial number somewhere besides the missing plate? Also where might I find the truck serial number? Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564974 Share on other sites More sharing options...
Joey Mack Posted December 30, 2024 Share Posted December 30, 2024 (edited) The truck vin may be stamped on the right front frame, rearward of the steer tire. I dont know about this era, but it is common on later models. I suspect a lot of air craft paint remover is in order.. Edited December 30, 2024 by Joey Mack Pour sell fone sperring 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564975 Share on other sites More sharing options...
Joseph Cummings Posted December 30, 2024 Share Posted December 30, 2024 40 minutes ago, h67st said: did they make a small cam 290? Yeah I had some in some 70's era IHC. Could even be a PT 270 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564976 Share on other sites More sharing options...
Joseph Cummings Posted December 30, 2024 Share Posted December 30, 2024 @Brocky What did Brockway call that? Was it the Huskydrive? Had a powerband like a Maxidyne Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564979 Share on other sites More sharing options...
Mark T Posted December 30, 2024 Share Posted December 30, 2024 25 minutes ago, Joseph Cummings said: @Brocky What did Brockway call that? Was it the Huskydrive? Had a powerband like a Maxidyne PT 270 was a power torque 270. Not to be confused with the "PT" cast in the fuel pump which was for " pressure time " He's got some form of a Small Cam. With a turbo ??? could be a 270, 290 or a 335. Without a CPL , it's hard to guess. 350 had an intercooler as did a 400 Magnum. Judging by the rest of the changes to the truck, who knows what someone may have done to that engine, as guys mixed and matched those quite frequently. Pretty cool truck, no matter though. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564980 Share on other sites More sharing options...
Mark T Posted December 30, 2024 Share Posted December 30, 2024 And yes, they were an attempt to be more like a Mack ( the PT 270 ) they were set up with some form of 5 speed in trucks besides the Huskiedive setup in the Brockways Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564981 Share on other sites More sharing options...
Joseph Cummings Posted December 30, 2024 Share Posted December 30, 2024 3 minutes ago, Mark T said: Huskiedive I drove one years ago. Had a 5 speed main and a wide ratio 2 speed rear. The ratio spacing was like a full gear, so you didn't split it. It was more or less just a low hole. I think Brockway called them CT270 or Huskidrive Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564982 Share on other sites More sharing options...
D-Day Posted December 30, 2024 Share Posted December 30, 2024 That looks like all of the 335 cumins I worked on never seen one with a aftercooler that was the 350 small cam and later Quote Link to comment https://www.bigmacktrucks.com/topic/74914-1953-mack-lj/#findComment-564983 Share on other sites More sharing options...
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