Prairie Bobcat 6x6 amphibious machine

[bc_archer]

Thanks

[ARGOJIM]

I don't know much about the PB, but do know that's a Jumbo and is probably mid 80s. There are some threads in the other AATV forum.
First thing I would do is check the rpm with a tachometer, you will want between 3600 and 4000 rpm, before you mess with the governor check for slack in the throttle cable and go from there.
As far as the brakes I think you are stuck with those and perhaps a religning of the band's may help. I thought I remembered the trans as being a Spicer but could be mistaken.

Get the engine right and then see where you are at, as with all these machines more throttle is often required during turning to help push the skidding tires.

Good luck

[bc_archer]

I bought mine near Hinton, Alberta a few years ago, so doubt that it would be the same machine as the one you saw. Now that I'm retired I have time to work on it and can't wait to get it running again.

[bc_archer]

BTW I researched the T92-1B transmission and found it was used in some tractor models and parts are still being made by Olympic Gear Products. I also found out the shifting lever wears out after about 20 years of usage resulting in it being stuck into two gears at once, but it can be repaired by building up the rounded edges with hard welding and then ground back to squared edges, so I'm going to take it apart and take it to a buddy who's a fabricator to get fixed if that is the problem. Thank goodness for everyone that posts information online to help other people out, I can't imagine trying to find this same information out 30 years ago. I will post updates as I proceed with the restoration.

[john swenson]

i did just watch the short video of a bobcat ( mc dougal auctioneers ) on u tube . shows some good shots of the shifter and such . looks just like yours ! cab and all . johnboy va. p.s. could it be the same one ? who knows...

[dirtdobber]

Wow. There's a lot going on with that drive train. I think it's pretty cool that it has 4 speeds in addition to the range of speeds offered by the CVT.

[bc_archer]

It also has a cab complete with windshield wipers and in cab heating and defrost using hot air from the engine compartment, but I had to take it off to get a better look at the drive chain adjusters and will put it back on for winter once iI'm done.

[john swenson]

archer...that's a cool machine . was interesting the dash diagrams of the clutches and tranny readings. looking forward to watching your project unfold . johnboy va.

[bc_archer]

Photos of my Prairie Bobcat 6x6

photos of the left and right side brake linkages, clutch(?) assembly and overhead views of drive system

[bc_archer]

Photos of my Prairie Bobcat 6x6

See attached photos including transmission and drive pulley linkage. Brake linkage pics to follow

[bc_archer]

wii do

[dirtdobber]

Post a pic so we can see what you have.

[bc_archer]

one other question, it is currently not running because i haven't hooked up the ignition wires after removing the cab to get at the drive chain tightening adjuster and it is currently in gear and i can't get it into neutral even with all wheels off the ground. Does this transmission require the engine to be running to engage the transmission into neutral or should i still be able to shift it without it running?

[bc_archer]

BTW the markings on my transmission reads T92-1B so would you say that it is a T92 transmission or is that just how the T20 transmission is marked?
Thanks

[bc_archer]

yes i believe that is the case, just as i get enough rpm to go up the ramp it starts moving forward then all of a sudden the clutch widens and the belt slips because the pulley gets too wide for it to grab. i was thinking it might have something to do with the governor, but i don't know much about them so don't know if my suspicions are correct or it's something else.