Borg Warner C72 Operating Pressure ?
 

I just rebuilt my Borg warner C72's...and I want to add trans oil pressure gauges..(reccomended by Marc @ Bam)...whats the range ?? 0-80..0-100 ?? :cool: :rolleyes:

Re: Borg Warner C72 Operating Pressure ?
 

I have them on my Huber 1450's and they run 155 lbs.

Re: Borg Warner C72 Operating Pressure ?
 

Interesting... I put temp sensors on mine because I fear over-temp condition. is it more important to watch pressure??

Re: Borg Warner C72 Operating Pressure ?
 

Pressure is more important...thats what Bam told me...

Re: Borg Warner C72 Operating Pressure ?
 

Use a 200 PSI gauge. Yes, pressure is more important. If you have enough cooler (we recommend 2x8 bundle) if they get hot they are already dead. Fluctuating pressure (#1 cause of failure) can indicate low fluid level before any damage is done.

Re: Borg Warner C72 Operating Pressure ?
 

Thanks Marc... :cool:

Re: Borg Warner C72 Operating Pressure ?
 

what is normal operating pressure ??...at idle I have 50-60 psi running its 110-125...is that OK ??

Re: Borg Warner C72 Operating Pressure ?
 

anyone ???

Re: Borg Warner C72 Operating Pressure ?
 

That's low. We won't ship one that won't hold 80 PSI @500 rpm hot. Pull the regulator apart and see what color spring is in it. Should be black. There is a white spring that was used for a while in an effort to drop the pressure (therefore less power used to turn the pump) but experience has shown that you do need more preesure.

Re: Borg Warner C72 Operating Pressure ?
 

More headachs..Marc...reverse on both trans won't engauge after I run awhile....on a cold start they shift fine...but its tough trying to manouver around without reverse...linkage is set to forward and reverse detents...I have to shift into reverse then netural then back to reverse...sometime they engauge...sometime they don't..pressure still a issue ??..what should I read when in forward @2500 rpm...always @100 psi..now...I wish I would have sent them to you...any ideas about reverse ??...do you think the power valves are bad ??THANKS FOR ALL THE HELP.....Dave.. :( :cool: :drink:

Re: Borg Warner C72 Operating Pressure ?
 

That is the reason for our 8o psi spec, under that they don't engage. I bet the pressure is over 80 psi when you first fire it up. Take the regulators apart, many times there is some crap or a burr keeping the regulator valve off the seat that will drop the pressure at idle.

Re: Borg Warner C72 Operating Pressure ?
 

what about running pressure ?? what should it be ??does the trans have to come out to pull the regulators?.....MY MERC MECH. SAID I SHOULD HAVE CLOSE TO 190 PSI @ 3000 rpm under load..??

Re: Borg Warner C72 Operating Pressure ?
 

Yes, should be up around 190. THe regulator comes out by removing the shift arm and then pulling the cover where the neutral switch is. I't about the only thing you can check without pulling it.

Re: Borg Warner C72 Operating Pressure ?
 

THANKS AGAIN MARC...!!...anything else that can cause the low pressure ??

Re: Borg Warner C72 Operating Pressure ?
 

Yes, but then you have to pull them. Pump, housing, reverse adapter, missing/cracked seal ring, worn bushings in planatary.

Re: Borg Warner C72 Operating Pressure ?
 

are the regulators rebuildable..?? replacement cost ??...worst case senario...how much for rebuilts exchange ?? (trade in my two complete units for rebuilts..or totaly rebuild existing ?)...

Re: Borg Warner C72 Operating Pressure ?
 

Marc...I pulled the regulators...what should I look for ??..how do you test them ??...should I send them to you ?

Re: Borg Warner C72 Operating Pressure ?
 

We can take a look, there really is no way to test them without being in the transmission. Figure $90 each to dis-assemble, change spring, re-assemble.

Re: Borg Warner C72 Operating Pressure ?
 

What kind of trans fluid are you running?

I was running regular tans fluid once and didn't have much reverse after a long run. As per Mark I switched over to type F and my problems went away.

Re: Borg Warner C72 Operating Pressure ?
 

using Valvoline type FA as Marc recomended..

where do buy a 200psi sending unit???

I got mine with gauges @Trick Marine...