A pinion brake is a driveline brake and will brake the vehicle via the differential. This means that if you are on slippery ground only the wheel with less traction will brake. A side slope will give you braking problems also.
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
Good point cranetruck! That's one of the reasons that we use them with fully locked axles and the new Deuce air lockers are not really an option for us.
__________________
1977 USMC M813-A1
M796A1 Trailer
MKT-95 Field kitchen
Same reason an engine brake has to be used with some associated brain activity.
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
I knew of the problem with the open diff, but since I had lockers, thats why I thought of it possibly, but due to added heat, and I do drive some distance from point a to b normally, i'll stick to the set-up known to work, the stock setup!
what about a air pullback release, no pad to disk contract at release, the pinion brake would be used as a Ebrake only (more for holding at a standstill), no air pressure, it applies, the standard ebrake leaves a lot to be desired, the brake would set eather by dumping the air from a valve on the dash, no air at startup, or a broken air line, the standard 5t ebrake just about holds the truck, let a lone a emergency stop. ive seen a bunch of newer big trucks as well as heavy equipment that use a disk brake setup as the ebrake, some of these you can not power though
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Ron
Gainesville, Ga. vietnam-1/66-8/68
"Technical Manuals are the path to Illumination...
Download, Study Learn"---rlwm211
42 5t? autocar tractor, gone
43m20, 12t, converted to tractor, gone
52m52, tractor, gone
73m819, tractor/wrecker AKA Wrecked Wrecker
77xm977 10t 8x8, to be a xm 983 sold
What ever else that can be drug home Use CUCVs, a small step below BOBBERS as wheel chocks
GOD help the MV world if i win the LOTTERY
LONG LIVE BIG GREEN IRON
73M19,
You pose a very interesting idea, one that I think would benefit Deuce and Five ton owners alike. If you could have one (or two) pinion brake(s) to use as a parking brake AND have the ability to fully retract the caliper pistons to eliminate ANY contact between the pad and the rotor you would have a very strong parking/emergency brake that would actually work!
Let me take this one step further. If you could use the existing parking brake handle and link it to a small bore remote master cylinder the product would be basically invisible to the untrained eye as most pinion brakes can also be mounted on the driveline side too. This would also give another system to brake the truck (and I believe it would stop it!) in the event of a failure in the single line brake system in the trucks now. I do not think that a mechanical system would be powerful enough so it must be hydraulic.
So what about it SS? Can we bring our vast experience and know-how to bear on this subject? Let's start putting out some ideas, rip them apart and put out some more!
Git-R-Done!
__________________
1977 USMC M813-A1
M796A1 Trailer
MKT-95 Field kitchen
What I stated about driving with a pinion brake, side slopes and slippery pavement, applys to a parked vehicle as well.
If you use the "driveline" parking brake (including the current one) on a side slope it will not keep it from rolling.
When the traction is not equal and the drive shaft locked, the two wheels will still be free to spin in opposite directions.
There may even be a law in some states making a driveline parking brake illegal.....
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
Forgive my ignorance, isn't the stock ebrake a driveline brake?
yup! as are most medium duty trucks and 1 tonners from yrs past.
I don't understand why the pinion brake setup you have drags so much and creates heat when your not using it. is it somehow different from a normal disc brake? I know disc brakes do drag some when not in use but it's not an issue bc everything produced today has them.
