Caterpiller oil for bruno

what's the name of the oil from caterpiller used in the bruno's???

Josh

 

check your pm.

 

I have the same question. What is the name but also why use this instead of a synthetic ATF? The biggest problem I have is heat, so I made a 4 inch deep pan to get more volume. Also, what pressure are you guys running your Bruno at? I can't seem to get more than 180 lbs. Would this caterpillar oil help? I think if I could get the pressure up I would have less convertor slippage which would equal less heat.
Thanks,
Gary

 

I have the same questions as SLAYER post

Thanks for the replay

Claude

 

When you talk about overheat in convertor oil , what is temp it goes?
on my Donovan unit with systetic oil , after the run ,the temp is at 240
is it too high ?
Claude

 

Hi Mike,
The Bruno doesn't use clutch packs or a valve body at all. There is a band around a drum which is on the input / output shaft for the trans break. This is co2 activated. There is a pump like any automatic trans but this is for the convertor. You may be right about the heat getting so high at the end of a run because when the motor is shut off the trans pump stops rotating. The problem is to not get so hot. I have checked my pump gear end clearence and it is too high (.007) so I'm going to grind the pump housing to get .003 to .004. I believe this is a correct amount? Just wondering why trans fluid has to be used. Why not use a good hydraulic fluid?
Thanks,
Gary

 

Mike, no disrespect but just to give an opposing example; I use to work for a crane company and I use to operate the very large cranes and do the maintenance . We had a few large cranes and the largest being a 450 ton capacity Krupp crane that weighed in a 100 tons going down the road . The large cranes all had automatic transmissions with retarders that worked in place of an engine or "Jake" brake to slow the cranes down coming down hills. The transmission retarders would build EXTREME heat when used, all of those cranes all use hydraulic oil in the transmissions and we never had a transmission failure.
P.S. With your fighter plane example; Don't things boil a lower point at a high altitude with less atmospheric pressure? Kind of the opposite of the reason that we cap a radiator to increase the pressure and raise the boiling point.

 

What is the name or p/n of the cat oil

 

i don't believe you will get the answer you want from a message board - but - you might get the direction to find your answer. (1) you need to talk with your converter person to make sure you can run cat hydraulic oil. (2) you will need to test, test, test. (3) cat makes different visocisities of their hydraulic oils that might help solve converter lock up problems - for example they might go from 40 weight to 100 weight hydraulic oils but each combination is different - hence no one answer for all combinations. the 10.5 racers found that by using cat hydraulic oils they can change their converter rpms on both the leave rpm and the top end rpm - again no one answer for all. you will either need to get real close to a 10.5 racer who uses cat hydraulic oils who is willing to give you his secrets or you will have to test, test, test. gains from .04 et in the 1/4 to over 400 rpm less slippage in the 1/4 have been reported. heat is not a factor if you run a quality bruno/converter cooler. this trick will not work on lencodrives due to them using the same fluids in the drive and the tranny.

 

Sooooo, would you say a high viscocity oil would give you the 400 more rpm? What is the advantage of a trans cooler on a 6 second dragster that is shut down at the end of the run other than increased amount of fluid (taking longer to heat up)? That can be achieved by a deeper pan, can't it? You have almost no air going through the cooler durring the burn out and staging unless you add a fan ( add weight?). Just curious of every ones opinion. Thanks.