Just recently picked this truck up and plan on restoring it. I've looked around but haven't been able to find much searching the forums.

I haven't yet figured out what model the drive shafts are anyone have any ideas??

second, anyone know what years/models for Marmon Herrington are parts interchangeable?

At some point I'd like to change the gearing in the axles, but first I need to figure out what they are and what will interchange.

I've heard Chuck is a great resource, but I hate to bug him every time I have a MH question.

Any info is greatly appreciated.

 

Welcome. Glad another M-H is being saved. There are several of us on this forum and on the 48-56 forum that have M-Hs. Chuck is your best resource, absolutely. What I've found on my smaller models is that M-H didn't change components just for the sake of change. I'd suspect your axles and transfer case are likely shared by later trucks.

Your axles are no doubt split case Timkens, and transfer case probably a Fuller. If you have a drive shaft missing or damaged they can be made locally. U-joints for my trucks are Dana/Spicer. Probably same for yours. Changing ring and pinion is a conversation to have with Chuck. You probably have the lowest available which is 6.66/1. Whether a later 5.14/1 would fit the case is the question.

You might post your M-H model number to let us know more about the truck. If it was a SnoGo it will have many unique features that Chuck should cover with you. Stu

 

Thanks for the info truckdog,

It was a snogo truck. Driveshafts etc are in good shape. Brake job will be needed in the future.

 

Chuck will have wheel and master cylinders, and shoes can be relined. But drums are another matter. They are NLA. Fortunately a SnoGo probably wasn't too hard on brakes given its low speeds of operation. Stu

 

Truckdog,

Any idea what model the Timken axles could be?

Or are you saying the Split case Timken is the model?

 

I think I found all the info I needed. Thanks Truckdog !!

https://www.ford-trucks.com/forums/1...version-2.html

Seems like the 4.86\1 gears would be much easier to find. I'm thinking I have the 6.61\1 gears now. I wonder how much of a difference that would make. What gears did you have before you swapped to 4.11 Truckdog? I'm really just looking to be able to cruise 55-60 without cranking serious rpm's.

 

Don't leave us hanging! What does the rest of the truck look like?

 

dupe post......

 

Here is the Monster

 

Your axles are different than mine. Mine are Timken 51524s that were carried over from the 1947 and earlier one ton model and used through 1952. Yours are no doubt Timken 53566s that Ford used throughout the 1940s and carried over to the 1948 to 1952 trucks. The available ratios on mine were a standard 4.857/1 (4.86) and very rare 4.11/1. Mine was the 4.86/1 before Chuck installed his 4.11/1 reproduction sets. On yours the available ratios were 6.666/1 (6.67), 5.83/1, and 5.14/1.

M-H built trucks to maximize available torque which says you no doubt have the 6.67/1 gear sets. You also originally had, probably still do, an under drive gearing feature fitted to SnoGos that maximized torque delivery at very low speeds. Chuck has told me that this under drive can be disabled/removed, but he'll have to add details.

Chuck also should be able to make you a copy of the Maintenace and Parts Manual for your truck if you have interest in having it. Stu

 

Now THAT'S a truck! Thanks for sharing!

 

Any idea on what other model trucks used the Timken 53566's from 48-52? Those are probably going to be the easiest ones for me to find.

 

Sure, the 48-52 Model F-4 had the 5.14/1 as the standard axle. The F-5 also used the axle. When teamed with tall tires, such as 8.25-20" at 38" tall, the 5.14/1 should yield reasonable road speed. I'll see if I can find a calculator to give estimates.

Looks like 55 mph at 2500 rpm. http://www.csgnetwork.com/rearendgearcalc.html

Was the dump bed added at some point? A SnoGo would have had a separate engine on the rear that would have operated a huge front mounted auger. Does the truck have SnoGo badging inside? Stu

 

The truck does have snogo tag, I've talked to them and they sent me the records of the truck having it installed. But at some point after it must have been converted by or using Woods Hydraulic co. It has a plate on the frame with the details. Seems weird they would have bothered converting the truck vs just getting another. Unless someone swapped Cabs?? I'm working on tracking down more info. I know the truck spent a good chuck of its life as part of a highway dept. Truck has 5400 miles on it. Assuming the odometer was working.

Thank you for the info.

 

Another issues is doing a tire and rim conversion. I'm not interested in dealing with split rims. And yes these are the center split rims. I'm already nervous about letting the air out of the darn things. For reading I believe these are 5 bolt 8 inch spread? Not sure on center hole diameter yet. I'd like to get some 1 piece that look like the originals. All but 1 tire looks good, no visible cracking etc.. in the tires. I do have 7.50x20 on the truck at the moment. 8.25x20 is fine with me if they fit. Anyone with experience in that department?

2500 rpm for 55 mph. Looks like I need to keep interstate travel to a min

Whats a good cruising RPM for a Flathead? This will be my first Flathead build. I plan to build the motor with a few more horses but nothing crazy. shooting for 140-150 hp. She isn't a race truck, and with those gears I wouldn't be able to use the power anyways.

I plan on yanking out the flathead and rebuilding. Keeping my fingers crossed that the block is ok. I've had no luck finding any useful numbers on the motor. I'm sure I'll find some after I clean the block and take off the heads etc. But as of now im leaning towards 99T 239 hopefully.