jeffbyrne

If it is a '300' it would be an 'Econodyne', I think it should have a two piece cast aluminium intake manifold and radiator mounted charge air cooler. It's got the old pressed manifold, looks like a '237' Around the mid 70's Mack shortened the engine ID's to things like T673C, T675. If it is a '300' I think they came out about 1980, it should be an 'EM6 300' or an 'E6 300'

It does'nt look like an AP, I think it is supposed to be AB.

The Gold Dog was originally for the Maxidyne, from about 1966 through to when Mack stopped using the Gold Dog, maybe mid 80's. Around the early to mid 90's the Gold Dog started to re-appear on the Mack Elite range. 1966 to the 80's = Maxidyne equipped trucks. Mid 90's to present = Elite range of trucks, all Mack built trucks, engine,gearbox and diffs. The E6-350 is a Thermodyne, that is a Chrome Dog.

Vlad, they used R-600/700 frame rails and crossmembers, front radiator and engine Xmember was a large fabrication built to suit the Super-Liner,I think it also catered for the steering box. The front suspension used the same R-600 rear spring mounting with the swing shackle, and the front of the spring fixed like an R-600 with a fabricated mounting bracket to the O/side of the frame rail. Cab and hood attachment was by bracketry built to suit.

In Australia in 1979-80 there was about 5 with 3408. The 1st two or three were RW-758RSX, the others were R-758RS. All Super-Liner's in Australia were built on the R series chassis'.

Looks like a 711, an F609T

Yes boostedretard, you are correct. I now see there were also such things as END457's in EH Diesel's, so possibly there were others. I have just looked in my A51 maintenance manual and it shows it as END510. Maybe the NR was an ED510. The NR's appear to have used a two piece inlet manifold, this could be one of the differences between an ED510 or 519, and an END510 etc. I would guess that sometime between the mid 40's and 1950 they have changed designations in line with some improvements from ED to END for Mack diesels.

I could be wrong, but I think a 510 and a 519 are designated ED510 and ED519. I think the 1st of the END's was the END672, which also had the 'Lanova' combustion chamber. I think this A51T has an END672.

I think they stopped using the three piece cast pedestal around 1990. I'd measure up my bolt patterns, I think you'll find that pedestal (3a) in my description is the only fabricated pedestal that fits inside the frame that will bolt straight in where the 3 piece pedestal fits(1). Pedestal(3) is a different fit, only about 10" between the lower middle bolts. The cast pedestal is about 12". Outer bolts is about 20" for the fabricated one and about 24" for the cast one. The fabricated pedestal that replaced the 3 piece cast pedestal might be closer in the bottom row bolt pattern. I'm sure the top row would be way out. This pedestal used four instead of five bolts.

Hi Kevin, I think walking beam is also for rough terrain, which is probably considered as heavy. jeff.

Hi, B53, that would work if the holes were there for five bolts and only used four bolts, or if no holes in the frame and only drill four. But it wont work for a five bolt pedestal in a four bolt frame or a four bolt pedestal in a five bolt frame without drilling new holes, they would be very close to unsed holes, as the bolt patterns are different. I think you would weld unused holes. The fabricated heavyweight pedestals from the mid 70's on only used four bolts, but they were designed for four bolts. A fabricated five bolt pedestal is designed differently to a fabricated four bolt pedestal in the bolt hole location.

Short answer, No. What you are refering to is the pedestal. There is basically three types of pedestal. (1) The pedestal which had it's origins around the L models, and continued right up till the early nineties,(I think). The bolt pattern might be slightly different from the L model to the B model, and later models. This was a three piece pedestal, i.e. a fabricated X member and two cast trunnion brackets, which bolt to the outside of the frame rail,with five bolts per mounting point. (as in Vlad's pic). It appears this was the only pedestal used. (2)Then sometime in the fifties(I think), there was a one piece cast pedestal which fitted entirely inside the frame. This pedestal was a one piece casting(X member and trunnion brackets). This one-piece cast X member and trunnion bracket continued until about the release of the R model. The frame rail bolt pattern for this pedestal is totally different to any other pedestal. It used four bolts per mounting point of the X member part. This was a lightweight pedestal. (3)About the time the R model was released, say 1965, a new one-piece fabricated pedestal became availble, this was a welded one piece X member and trunnion brackets, usually with a hollow spindle and rubber bushes. The bolt pattern for this pedestal is a different pattern the the other two mentioned pedestals (1)&(2). It has four bolts per mounting point of the X member. This pedestal superseded the one-piece cast pedestal (2). (3a)Sometime in the early 70's(I think), another pedestal was used, I have only ever seen two or three of this type. It was a one-piece fabricated X member and trunnion brackets with a solid spindle, rubber bushed, with the same bolt pattern as the three piece fabricated X member and cast trunnion brackets pedestal(1). This type of pedestal used a large screw on cap on the end of the spindle, with two allen screw locking screws. I beleive that this was a heavy weight pedestal. It fits inside the frame like (3) but has the same bolt pattern as (1). I hope I have'nt confused you, but you might be able to work out which pedestals you are refering to.

I would have to go with Peterbilt. 351 or 352 of the 60's.

Pretty sure 'L' engines had aluminium tappet covers and sump pan plus whatever else you guys suggested. The 'L' denoted 'Light' or 'Lightweight', hence the aluminium parts. Pretty sure any hp and torque rating was available whether an 'L' engine or not. BIDSTBC.

An END673C is a derivitive of the END673, both non Turbo. The 250 is an ENDT673C, or it could be stamped T673C 'T' for turbo. Do not be mistaken for an END673T which is a Turbocharged END673. Are you confused yet? Jeff.

I was over in Oregon for three weeks in May 2011, I would like to come back and do some touring on the east coast someday. We drive on the RIGHT side in Australia. Jeff.

Well one thing for sure, it had a V8 at one time, you can see the holes for the 'Thermodyne' and V8 badges

Hi Jim, the model numbers can be confusing, e.g. A B633 is an END673T but it was different with the B80 series. B83 Cummins 220-250, depending on year. B833 Cummins NT-6-B B85 Cummins NHS-6-B B853 Cummins NTO B87 Cummins NHRS-6-B, ( an error in my previous post, I said a B87 was a Cummins Turbo 6, it is a Supercharged 6) B873 Cummins NRT-6-B Regards Jeff.

Hi, you have quoted the chassis No., that chassis No. is for an END864. It is quite normal for people to wonder what is the story. I have known of new trucks to be altered by the factory or the dealer, (in Australia) to suit recquirements. It could be that at the end of the model run, before the R model, that someone wanted a B83 in a certain WB or whatever, and the engine was swapped when the truck was new to make the sale. It's also possible that the truck could have been two or four years old and Mack did an engine change. The paper work you have could be for that. We don't know. We're just wondering. All we know is there is a guy with a 66 Mack B815SX with a Cummins 250 in it, who says it's original, and a few blokes are saying 'a B815 would be an END864 V8, wonder what the story is, it's not quite clear'. The models go something like this, B80 Mack Gas(petrol) B81 Mack END673 B83 Cummins 220-250 B813 Mack END673T B815 Mack END864 V8 B87 Cummins turbo 6 Regards Jeff. Correction to the above, a B87 is a Supercharged 6, a B873 is a Turbo 6

Yes a B-815 would have had an End864 V8. Maybe he's saying the Cummins 250 is an original, never rebuilt engine.

A similar question was asked recently.

Hi Josh, I'm pretty sure a Dynatard engine's camshaft is different from a non Dynatard engine's camshaft. Regards Jeff.

Looks nothing like a B47 except for the B model tinware

What do you think it is ?