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Author Topic: Old TJ brakes / Disc conversion  (Read 515 times)

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Offline mf40diesel

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Old TJ brakes / Disc conversion
« on: January 27, 2019, 08:50:54 AM »
I run an old TJ 225, selective cut work, view lots, firewood etc...  machine is pretty darn straight. But like many it seems, she’s has practically no brakes. (The band brake works, but foot brake doesn’t, or very little.)

Currently I am working on a pretty steep side hill, trying to regain a view for some people. Had a few little scares...  brakes have moved up on the “to do,” list. 

I believe I can rebuild the current drum brakes fairly easily..  however I know others have converted to a disk brake. Does anyone have any info on how that was done?  What parts/brackets to get?

Seems I heard it was pretty easy, but don’t want to go into NAPA completely uneducated. 
John Deere 5055e, mfwd. Farmi JL306 Winch. Timberjack 225 Skidder. Splitfire splitter & Stihl saws.

Offline 47sawdust

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Re: Old TJ brakes / Disc conversion
« Reply #1 on: January 27, 2019, 08:58:18 AM »
Seems the quickest is a rebuild.Harold's should be able to fix you up or point you in the right direction.
Also a forum search will show you how others have done the conversion on Tjacks.It was a topic recently.Good luck.
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Offline Firewoodjoe

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Re: Old TJ brakes / Disc conversion
« Reply #2 on: January 27, 2019, 09:48:34 AM »
I’d just google caliper and rotor kits and modifie it to your drive line.

Offline Firewoodjoe

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Re: Old TJ brakes / Disc conversion
« Reply #3 on: January 27, 2019, 09:55:58 AM »
You’d also need a master cylinder which is not a big deal either. But I bet you’d have $300+/- into it and a fair amount of labor to build modifie. But after it was done man it would be cheap and easy to put new pads on.

Offline mike_belben

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Re: Old TJ brakes / Disc conversion
« Reply #4 on: January 27, 2019, 12:44:52 PM »
Personally i dont think loss of brakes when the engine stalls should be acceptable, which is what my forkloader has and it is only by the grace of god the thing has killed anyone.

You want to build a system that does not need a fluid or vacuum assist.  So thats old manual master cylinder disc brake systems.  You want a SMALL master cylinder piston, not a large one.  The large one has too much area and requires too much input force.  

I recommend a 79 thunderbird master cylinder, cadillac eldorado calipers with a manual ebrake lever and whatever rotors u need to adapt onto your driveline.  Its not hard to transfer a hub pattern onto a plate, cut out, weld it onto the shaft, bolt up the plate and caliper to lathe turn them back true while bolted to the driveshaft.  Or you could probably incorporate the rotor mount to some pinion yokes, though welding onto cast takes some procedure.  If replacement yokes were unobtanium i wouldnt risk it.

AA-mfg makes all the cheap GM caliper brackets u can imagine to mount them.  


With approx 3:1 planetary axle ends, even a motorcycle hydraulic hand brake may suffice.  Long periods of braking require mass to dissipate heat, but parking just takes force. Depends on your needs. 
Revelation 3:20

Offline 47sawdust

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Re: Old TJ brakes / Disc conversion
« Reply #5 on: January 27, 2019, 03:21:48 PM »

Forestry and Logging / Re: timberjack brake
« by skolvek on November 06, 2018, 06:12:50 PM »
This thread has more info.which might lead to more info.
Mick
1997 WM Lt30 1999 WM twin blade edger Kubota L3750 Tajfun winchGood Health Work is my hobby.

Offline mf40diesel

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Re: Old TJ brakes / Disc conversion
« Reply #6 on: January 27, 2019, 08:13:37 PM »
Thanks so much for the info. Prolly should have called Randy first...  surely he’ll have everything

When working of flat ground, it hasn’t really bothered much...  but a couple times recently, I stomped hard on the binders and barely got anything. 

I’m not telling the wife anything about that!
John Deere 5055e, mfwd. Farmi JL306 Winch. Timberjack 225 Skidder. Splitfire splitter & Stihl saws.

Offline Stoneyacrefarm

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Re: Old TJ brakes / Disc conversion
« Reply #7 on: January 28, 2019, 10:23:04 AM »
You’ve got Davco up your way as well. 
Their great to talk to on the phone as well. 
Give them a call. 
They may be able to walk you thru setting everything up. 
Work hard. Be rewarded.

Offline mf40diesel

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Re: Old TJ brakes / Disc conversion
« Reply #8 on: January 28, 2019, 06:52:23 PM »
Funny enough, planning on a trip to Farmington to run to Labonville for some supplies anyways. Was looking for a reason to go to Davco. That place is awesome. Although, more into the treefarmers then TJ’s. Which aren’t nearly as good. ;)   Lol 
John Deere 5055e, mfwd. Farmi JL306 Winch. Timberjack 225 Skidder. Splitfire splitter & Stihl saws.


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