Anonymous-0
Well-known Member
Has anybody ever combined frontwheel steering with articulating? Should make it more maneuverable if it's possible.
- Thread starter Anonymous-0
- Start date
glennster
Well-known Member
years ago i worked for a township highway department. we had "BIG BERTHA" it was a home-made tractor that came from Minnesota. it was two truck differentials, a detroit diesel engine, and the boss said it had a truck transmission flipped around backwards to gear it down. the tractor was steered with hydraulic cylinders, the engine trans and transfer case did not swivel, but the axles did. it had a massive v-plow mounted on it , and a wing plow on the side. that machine could move some snow.
A truck transmission "flipped around" would not gear it down, but would actually speed it up in all gears except high, which would be a 1-1 ratio. I've seen homemade stuff where there were two transmission in series (one behind the other)to gear something down further, but never seen one installed "backwards".
We took in on trade, a four wheel industrial loader in years ago. I think it was a Pettibone. It had the most convoluted, confusing steering I'd ever seen. It was articulated, and also had separate front and rear steering. On top of all that, it had a selector valve for the front and rear steering (when not articulating) for - front wheel steering only, rear wheel steering only, four wheel steering all in the same direction, and four wheel "crab" steering where the front wheels pointed the opposite direction of the rear wheels. This was factory made, not homemade.
armand tatro
Well-known Member
Many roadgraders have kept the front wheel steering and combined it with articulated steering with that pivot point located at the front of the cab. Armand
Anonymous-0
Well-known Member
And that second transmission was apparently a factory option in some Ford Model T or TT trucks. With a 3 speed GM style transmission between the T pedal operated transmission and the drive shaft. I've seen 4 or 5 built that way in the last couple years. Mostly heavy duty trucks, though one was a school bus.
When my dad built a home made garden tractor from model A parts and a single cylinder gas engine, he used belt reductions. One fixed 4" to 10" (two Bs for 7 hp) and the second 3" to 10" (three Bs) that was also the belt clutch with a movable idler. I has run nearly 60 years on two sets of clutch belts and one first reduction belt set. With tire chains and an adult driver for weight it pulls a single 8" horse plow bottom in clay. When my dad got into his 80s he added hydraulics. I have it now.
Gerald J.
When my dad built a home made garden tractor from model A parts and a single cylinder gas engine, he used belt reductions. One fixed 4" to 10" (two Bs for 7 hp) and the second 3" to 10" (three Bs) that was also the belt clutch with a movable idler. I has run nearly 60 years on two sets of clutch belts and one first reduction belt set. With tire chains and an adult driver for weight it pulls a single 8" horse plow bottom in clay. When my dad got into his 80s he added hydraulics. I have it now.
Gerald J.
Fawteen
Well-known Member
- Location
- Downeast Maine
Dual transmissions were a common thing in the early days of OTR trucking, right up to the late 50's at least. One combo I've seen on straight trucks used for lugging pulpwood out of the boondocks was a 5+4, aka "Five in the front and four in the back" Lotta ratios there, and with both trannies in lo-hole, a baby could crawl faster than that truck was moving.
Anonymous-0
Well-known Member
I had a '65 F-350 with NP 435 transmission and a rear axle, I think, from a duece and a half, definitely larger than the typical 1 ton axle. Rear axle ratio 5.125:1. NP 435 granny gear was about 7:1. It moved about 2 mph at idle in first or reverse. Sure faster than a baby's crawl but I pushed out of getting stuck a couple times and had no troubles catching it when it was moving on its own. I didn't have to run to catch it.
So its overall engine to axle ratio was about 35:1.
A good 4 or 5 speed old time truck transmission would have that 6 or 7:1 lowest low and probably at least a 3.8 or 4.10 rear axle. Stacking two of those transmission would make it move slowly, but if you goosed it, the drive shaft would probably twist if the tires didn't slip. Overall ratio about 140:1.
Good for house moving.
Gerald J.
So its overall engine to axle ratio was about 35:1.
A good 4 or 5 speed old time truck transmission would have that 6 or 7:1 lowest low and probably at least a 3.8 or 4.10 rear axle. Stacking two of those transmission would make it move slowly, but if you goosed it, the drive shaft would probably twist if the tires didn't slip. Overall ratio about 140:1.
Good for house moving.
Gerald J.
in-too-deep
Well-known Member
Bobcat Toolcat
"Front-Wheel Steer Or All-Wheel Steer
It’s the best of both worlds. You can choose front-wheel steer for road travel or all-wheel steer when working in tight spaces or when aggressive steering is needed. Make the change from one steering mode to the other without leaving the operator’s seat. Simply align the front and rear wheels using the AWS indicator lights, press the switch and away you go."
"Front-Wheel Steer Or All-Wheel Steer
It’s the best of both worlds. You can choose front-wheel steer for road travel or all-wheel steer when working in tight spaces or when aggressive steering is needed. Make the change from one steering mode to the other without leaving the operator’s seat. Simply align the front and rear wheels using the AWS indicator lights, press the switch and away you go."
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