yolner
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Most pinion brake kits I see online come with a little 12" rotor and a tiny toyota caliper. Would something like that really stop an M35 going 50mph?
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Hydraulic fuses for brakes
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The pinion brakes are very effective because they benefit from the axle gearing. The drawback is they get very hot very quickly. Premium racing style brake pads are able to handle significant heating and are not that expensive.
I did not suggest this setup for use as regular braking. It would be only for emergency service and would stop a deuce just as effectively as a dual circuit setup with one of the two circuits failed. Many monster trucks use pinion brakes exclusively. Having an emergency braking system is far better than no brakes at all.
I did not suggest this setup for use as regular braking. It would be only for emergency service and would stop a deuce just as effectively as a dual circuit setup with one of the two circuits failed. Many monster trucks use pinion brakes exclusively. Having an emergency braking system is far better than no brakes at all.
yolner
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Yeah that does sound like a good emergency backup. Just so I'm clear... Are pinion brakes supposed to be installed on each axle or just one of the rears?
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Having an emergency braking system is far better than no brakes at all.[/QUOTE]
I wholeheartedly agree. Set them up as part of the park brake system perhaps. Then if the primary brakes fail, pulling the park brake lever becomes an option.
I'd like to see it done once at 50mph as proof of concept.
I wholeheartedly agree. Set them up as part of the park brake system perhaps. Then if the primary brakes fail, pulling the park brake lever becomes an option.
I'd like to see it done once at 50mph as proof of concept.
yolner
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That would make for a good youtube video. Will the truck stop? Will the driver manage to maintain sphincter control?
rustystud
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rustystud
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I wholeheartedly agree. Set them up as part of the park brake system perhaps. Then if the primary brakes fail, pulling the park brake lever becomes an option.
I'd like to see it done once at 50mph as proof of concept.[/QUOTE]
That's the only thing I would ever use them for.
rustystud
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With more pinion brakes you have sharing of the load. A monster truck at a four wheel center here in El Paso has one for the rear axle set and one on the front. All of the original brake drum components have been removed. I have seen that truck make quick stops without issue.
As an emergency only brake system, only one installed on the rears. It may result in giving up after one stop as the pads may become glazed and the rotor warped, all from excessive heat. It would all depend on the particulars of the emergency stop such as speed and truck load.
rustystud
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Of course the whole thing with "Monster trucks" is they are not going 50 mph down the freeway. I have never seen one go over 30 mph in the arena. They usually are just crushing cars and such and maybe jumping over some dirt mounds.
Yeah, but they do stop repeatedly when they have to because they are surrounded by spectators. Again, this would be a system for use in an emergency.
rustystud
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Yes, emergency use only.
rtadams89
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I see you can get a pinion brake kit designed for the 2.5 ton Rockwell axles for about $300. Add to that a hydraulic handbrake lever and stand alone fluid reservoir ($60) and for $360 you have an emergency pinion brake. As has been mentioned, I don't know if it would last more than one high-speed stop, but combined with the stock parking brake, seems that you might have a chance of at least significantly slowing a deuce. So who's up to test it!?
winfred
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i was looking at a pinion brake but its unlikely to clear oil pan so it'll need to go on rear (fine by me as i have a detroit locker in front and need to unlock the hubs to drive on pavement) but if ya could run two in the back that could be amusing, i like this kit for the 4 pot caliper and big rotor https://patparts.com/products/pinion-brake-kit