Trailer brakes retro fitting

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Wheelie
Posts: 67
Joined: Mon Oct 30, 2017 8:42 pm
Location: Ireland

Trailer brakes retro fitting

Post by Wheelie » Fri Dec 28, 2018 9:48 pm

Hi just wondering has anyone ever fitted trailer brakes on the 90 series models or can it be done? Thanks

Ian
Posts: 48
Joined: Wed Oct 03, 2018 12:03 pm
Location: Dumfries and Galloway

Re: Trailer brakes retro fitting

Post by Ian » Sat Dec 29, 2018 7:47 am

Yes it can be done but the biggest problem is finding the parts I believe the valve is still available but unless you can find the other parts on a bracket tractor the need making up specialy there has just been a thread about it on one of the David Brown face book pages

Wheelie
Posts: 67
Joined: Mon Oct 30, 2017 8:42 pm
Location: Ireland

Re: Trailer brakes retro fitting

Post by Wheelie » Sat Dec 29, 2018 9:31 am

Ok great,was interested in putting them on,is the valve used for transferring to the trailer coupling?don't really know much about it,but would be a good addition

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ollek
Posts: 3743
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Re: Trailer brakes retro fitting

Post by ollek » Sat Dec 29, 2018 11:11 am

The trailer brake valve is fitted in the main oil supply (original pressure pipe remove and two pipes fitted) from the front mounted hydraulic pump to the pressure filter. The brake pressure from pressing both brake pedals is fed into the trailer brake valve and the pressure to the trailer brakes are dependent on the pilot pressure from the brake pedal pressure. The pressure to the trailer brakes is therefor dependent on how hard the brake pedals are pressed and the maximum pressure to the trailer brakes is around 130 bar. The trailer brake oil pressure is taken from the main hydraulic oil stream. The quick coupler for the trailer brakes is a special coupler that prevent air from getting into the system. Normal trailer tip quick coupler must not be used for trailer brakes. The brake drums, cylinders and linings on the brakes fitted to the trailer must be constructed to be used with the pressure coming from the trailer brake valve. The brakes on the trailers are usually drum brakes and these are fitted by the trailer manufacturer. The following link shows the parts for a 1494 trailer brakes and trailer brakes for a 90-series tractors are similar https://partstore.caseih.com/us/parts-s ... 6ar1077621 All parts with a reference number are different or additions to parts for a tractor with only normal brakes.

Wheelie
Posts: 67
Joined: Mon Oct 30, 2017 8:42 pm
Location: Ireland

Re: Trailer brakes retro fitting

Post by Wheelie » Sun Dec 30, 2018 9:21 am

The main hydraulic line is used! That's good info there,well think I would be getting someone to fit them brakes if I did do it reckon,seems a good bit of setting up,thanks,and for the link too

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ollek
Posts: 3743
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Re: Trailer brakes retro fitting

Post by ollek » Sun Dec 30, 2018 12:56 pm

Do you have a trailer fitted with hydraulic brakes that meets the standard for tractor trailer brakes. ? If not, then you will have to get a trailer with brakes or change the complete trailer axle for one with hydraulic brakes before you can use the trailer brakes fitted to the tractor. The trailer brake set up on the tractor is of no use if the trailer don't have brakes.

Wheelie
Posts: 67
Joined: Mon Oct 30, 2017 8:42 pm
Location: Ireland

Re: Trailer brakes retro fitting

Post by Wheelie » Tue Jan 01, 2019 1:36 am

Yeah that's fine,no haven't got a trailer with working brakes but I would be able to get the loan of a longer bale trailer during the summer,and the trailer brakes would be a safe addition that was really it, wouldn't intend using that trailer if the trailer brakes weren't on the tractor,so yeah might look into it more,is it a big job to install them if all parts were available?I would probably get someone to do the job anyway

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