Patracy's "SEMTT"

patracy · Mar 7, 2013

Cab is to be picked up monday from NY. Got the first part for it in today...

Soni has some concerns about the keyway sheering from the constant change of direction. I'm going to use a keyed shaft in this and key like normal, but I'll have my step father TIG it to the hub for me.

73m819 · Mar 7, 2013

Welding to the shaft could cause heat cracks or fiatigue if the shaft is heat treated, either of these conditions could cause a failure over time.

patracy · Mar 7, 2013

73m819 said:
Welding to the shaft could cause heat cracks or fiatigue if the shaft is heat treated, either of these conditions could cause a failure over time.

Yes, if it was improperly done. I've had him weld a coupler together for me in my samurai's driveline. That's a heat treated part that is subjected to a lot of stress spinning at 3K + rpm at times. I would NOT try something like that with a stick welder or MIG due to heat. Actually I was talking to him and we're going to construct a custom shaft that will be a machine fit for an extra ounce of protection as well. The welds will at that point only be "insurance" to prevent the shaft from moving.

BradBMI · Mar 7, 2013

if your looking for 923's i have about 6 for sale in NY

patracy · Mar 8, 2013

I do see one issue ahead for me. The radiator on the 931 isn't a tall and narrow radiator like the 916's of Soni's. I *hope* however I can just rotate the radiator as the ports will pretty much line up by just making the bottom tube the crossover.

patracy · Mar 13, 2013

Not much to update, but the cab is on the way now at least!

3/13/2013

11:29:19 AM

Departed NORRISTOWN, PA in route to RICHMOND, VA

Hoefler · Mar 13, 2013

patracy said:
Well I pulled the trigger on a cab. Now to get it down here from NY. Like Soni's FEMTT, this one will end up on a 6x6 chassis. But it'll be a M931 or M923, and just a lowly NHC 250 or 8.3. Anyone heading south from NY?

When your cab arrives, take note on the paper tapped to the driver side window-these cabs where delivered from the factory in Feb of 2012! Make certain there are boxes in the cab-in those boxes you will find the collapsable foot holds for getting into the cab.
I will be watching this build as I have the Soni build. I too have an M923 and a cab that I was thinking on messing with. I really like how the FEMTT is turning out-its over the top well executed and looks great.
Pete

patracy · Mar 15, 2013

Cab is at the warehouse! Got my oldest son's birthday tomorrow, so I'll be picking it up sunday and bringing it back home.

PETE BALLARD · Mar 16, 2013

If you lived closer to me you would have some free help - what a cool project!!!!!

M920 · Mar 16, 2013

Awesome! I'm really glad you went with the NEW cab....it will be so much more "rewarding" when you're done!
Looking forward to your build!!! :jumpin:

patracy · Mar 17, 2013

I got the cab home today. Tomorrow I'll start tearing down the front end of the truck. I'm going to have to flip the radiator 90* to get the clearance I need. Also going to have to notch the frame I think to allow it to drop down enough.

M920 · Mar 17, 2013

Looks all very exciting!! It will be interesting to see the 5 ton without the hood, so that I can get a picture of what kind of modifications that setup is going to encompass. I have never owned a 900 series 5 ton, so I really don't know what they look like under the hood. (except for the very detailed GL pics of course!) :roll:

Good luck on your build, it's going to be awesome!

patracy · Mar 17, 2013

M920 said:
Looks all very exciting!! It will be interesting to see the 5 ton without the hood, so that I can get a picture of what kind of modifications that setup is going to encompass. I have never owned a 900 series 5 ton, so I really don't know what they look like under the hood. (except for the very detailed GL pics of course!)
Good luck on your build, it's going to be awesome!

The 939's radiator is installed horizontally instead of vertical like yours. I know your radiator has the tank on the top of it though. I'm thinking about flipping my radiator 90*. Then replumbing everything to the new positions. And elevating my external tank above the radiator line. I don't see me being able to pass the steering shaft otherwise.

I don't think there's enough frame real estate either. So I'm going to cheat and use a set of frame extensions from a winch truck to extend the front frame. Then I'll tie those ends into a MRAP buffalo bumper. And build the "skid" setup off that. Basically trying to use as much off the shelf parts as possible.

Harness - I'm not sure what I want to do here. I'm almost of the mindset that I'd like to just slowly strip the truck down and remove the complete cab harness, then extend the leads of each wire one by one long enough to move the "cab" harness into the new cab. I'm also thinking of porting over my gauges to the truck as well. But I'll probably use aftermarket speedo/tach gauges since the cables wouldn't reach.

Air lines - I didn't realize that the MK48 was setup like a tractor and already had all the controls needed. I'm going to have to follow your lead on your plumbing actually.

patracy · Mar 18, 2013

Well not as much as I'd like to get done today, we're getting hammered by high winds, rain, and lightning. The hood and front bumper is removed. I've gotta pick up a couple of 5 gallon buckets to hold the coolant. I'm going to have to notch the frame at the radiator 1" on each side when I flip it. Hopefully I'll be able to re-purpose a lot of the coolant hoses as well with what I have planned. Wish I could get away with not flipping the radiator, but there's just no clearance for the steering shaft if I don't.

Hoefler · Mar 18, 2013

Have you thought of a bell crank to get around radiator? One in front of the rad in the center of frame-the other on frame rail ahead of the existing steering box.

patracy · Mar 18, 2013

Hoefler said:
Have you thought of a bell crank to get around radiator? One in front of the rad in the center of frame-the other on frame rail ahead of the existing steering box.

Honestly if you look at the number of gear boxes and joints in the system already. I really don't like the thoughts of adding more failure/slack points to it. I don't believe flipping the radiator will be all that terribly difficult. (Also a lot more cost effective than purchasing a setup like that)

camoyj7 · Mar 18, 2013

Going to be another cool build!

ryan77 · Mar 18, 2013

patracy said:
The 939's radiator is installed horizontally instead of vertical like yours. I know your radiator has the tank on the top of it though. I'm thinking about flipping my radiator 90*. Then replumbing everything to the new positions. And elevating my external tank above the radiator line. I don't see me being able to pass the steering shaft otherwise.

I don't think there's enough frame real estate either. So I'm going to cheat and use a set of frame extensions from a winch truck to extend the front frame. Then I'll tie those ends into a MRAP buffalo bumper. And build the "skid" setup off that. Basically trying to use as much off the shelf parts as possible.

Harness - I'm not sure what I want to do here. I'm almost of the mindset that I'd like to just slowly strip the truck down and remove the complete cab harness, then extend the leads of each wire one by one long enough to move the "cab" harness into the new cab. I'm also thinking of porting over my gauges to the truck as well. But I'll probably use aftermarket speedo/tach gauges since the cables wouldn't reach.

Air lines - I didn't realize that the MK48 was setup like a tractor and already had all the controls needed. I'm going to have to follow your lead on your plumbing actually.

Is that green chair your using as a step latter osha approved??? LOL

Danger Ranger · Mar 18, 2013

Well apparently I have not subscribed to this, even though I have been watching this since the start. Good luck Patracy, this should be a cool one.

Farmallmilitary · Mar 18, 2013

Subscribed

Patracy's "SEMTT"

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