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Old 09-30-2012, 01:46 PM   post #1 of 29
Harryc
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Default 140 Brakes

I took a look at the brakes on the 140 today because it barely is able to hold on a hill, and unfortunately I live on a good sized one. In the pics below, the left pad/shoe is quite a bit more worn than the right, and in the 3rd pic, I am holding the brake lever in the position where the pads/shoes are just touching the rotor, and per the Service Manual that is where you adjust it to. As you can see there is no way I can adjust that clevis on the threaded rod to take up all that slack. So am I looking at new shoes? I wonder if there is a spec for the thickness of the rotor? It could be worn too I suppose.

Edit: Just checked Deere parts, both shoes and the rotor are NLA. Great ... such is life with a 43 year old machine.
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Last edited by Harryc; 09-30-2012 at 01:57 PM.
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Old 09-30-2012, 02:03 PM   post #2 of 29
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Default Re: 140 Brakes

Harry

For some reason I am thinking that I read some where about relining the shoes... Sorry can not remember where or when. Hopefully I did not dream it. But maybe it is the best option.

What do the other members think? Fellows?
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Old 09-30-2012, 02:22 PM   post #3 of 29
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Default Re: 140 Brakes

I doubt the rotors are worn.

Check the condition of the lever at the point of contact to the back of the pad. Also, check this point on the back of the pad for wear.

Pads can be relined at a reputable brake shop, by someone who knows what the heck they're doing. Check with a truck repair/srvice shop for info on who relines brakes in your area.
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Old 09-30-2012, 02:37 PM   post #4 of 29
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Default Re: 140 Brakes

Looking at your picture it appears the plate that your brake lever goes through is bent and it should be straight, it is common for those to bend on a hard brake application and these disc brakes never worked that well, that's why every tractor after the 140 and 120 had drum brakes instead of disc
.
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Old 09-30-2012, 02:44 PM   post #5 of 29
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Default Re: 140 Brakes

And see how the bolts are that hold the brake assembly together, it appears that those bolts need to be tightened down to hold the assembly tighter together to take out the excessive clearance.
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Old 09-30-2012, 02:57 PM   post #6 of 29
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Default Re: 140 Brakes

Check where the lever rubs on the back of the brake pad, its probably worn a divit in the back of the pad and the end of the lever will have some wear as well as the pin that goes through the brake lever that is the pivot point for the lever, these points will wear out before the brake pads ever would because there is not a lubrication method for these parts and they are normally left dry which accelerates the wear
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Attachments:
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2 Brinly 12" three point plows
Brinly 10" sleeve hitch plow
Briny three point cultivator
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John Deere 54" blade
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Custom built sleeve hitch 3 bottom plow
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Old 09-30-2012, 02:59 PM   post #7 of 29
Harryc
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Default Re: 140 Brakes

Quote:
Originally Posted by TRACTORMANDAN View Post
And see how the bolts are that hold the brake assembly together, it appears that those bolts need to be tightened down to hold the assembly tighter together to take out the excessive clearance.
I thought of that, but there are (2) things at play. First you need movement on those pins/bolts so that the shoes can move in and out. The second thing is that they are not threaded all the way through, and the nuts on the ends of the bolts are up against a stop and tight...I might be wrong though. I'll take another look. Thanks

Last edited by Harryc; 09-30-2012 at 03:15 PM.
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Old 09-30-2012, 03:02 PM   post #8 of 29
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Default Re: 140 Brakes

Quote:
Originally Posted by TRACTORMANDAN View Post
Looking at your picture it appears the plate that your brake lever goes through is bent and it should be straight, it is common for those to bend ...
.
Wow, really? That is VERY thick steel plate. I'll see if I can find a pic of how it should look.

Last edited by Harryc; 09-30-2012 at 04:12 PM.
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Old 09-30-2012, 03:05 PM   post #9 of 29
Harryc
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Default Re: 140 Brakes

Quote:
Originally Posted by TRACTORMANDAN View Post
Check where the lever rubs on the back of the brake pad, its probably worn a divit in the back of the pad and the end of the lever will have some wear as well as the pin that goes through the brake lever that is the pivot point for the lever...
I'll take another look. The plate and the lever are also NLA though. Worst case is I weld a 1/4 or 3/8 small square piece of plate to the back of the shoe where the lever hits on each side. That would probably take care of the problem.

Last edited by Harryc; 09-30-2012 at 04:27 PM.
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Old 09-30-2012, 03:11 PM   post #10 of 29
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Default Re: 140 Brakes

OK, take a look at this EBay picture. The plate the lever goes through is also bent over pretty well. I'd have to say that is normal.
http://www.ebay.com/itm/1968-70-JOHN...item51a12de467
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Old 09-30-2012, 05:37 PM   post #11 of 29
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Default Re: 140 Brakes

Anyone have an idea of what the pad thickness was on the original '69 140 brakes? I am guessing somewhere around 3/8"
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Old 09-30-2012, 06:36 PM   post #12 of 29
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Default Re: 140 Brakes

Gosh Harry, is that 140 falling apart on you-tell you what, just ship it down this way and I will take it off of your hands then no more brake problems.

Dick
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Old 09-30-2012, 07:12 PM   post #13 of 29
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Default Re: 140 Brakes

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Gosh Harry, is that 140 falling apart on you-tell you what, just ship it down this way and I will take it off of your hands then no more brake problems.Dick
Falling apart? . It never was together... LOL. It is a needy little guy, but no problem because progress is being made so it's all good. I'll post pics someday soon.
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Old 09-30-2012, 07:42 PM   post #14 of 29
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Default Re: 140 Brakes

I would start with taking the whole assembly apart and wire wheel the bolts,springs,spacers and clean the holes in the brake pads where it rides on the same.Also take the adj rod clevis apart and clean - lube the threaded area so it can be adjusted. I think when cleaned up so the brake shoes can slide more easily will probably help and if too much effort is needed to work the brake mechanism you might not be getting all of the range of motion on the whole system.On most disc brake systems on lawn & garden tractors the disc or rotor needs to slide back and forth on the shaft it rides on to function properly and that could be the cause of one pad being worn more than the other.I cant remember if the system you have works this way (its been awhile) but check that out also.I just did this job on Phils electrak different style same principal.
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Old 09-30-2012, 07:44 PM   post #15 of 29
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Default Re: 140 Brakes

Quote:
Originally Posted by TRACTORMANDAN View Post
Looking at your picture it appears the plate that your brake lever goes through is bent and it should be straight, it is common for those to bend on a hard brake application and these disc brakes never worked that well, that's why every tractor after the 140 and 120 had drum brakes instead of disc
.
The 140 switched to drum brakes about mid-way through the production run. Can't remember the exact date, but my '72 has drums.

Harry, no suggestions, but I hope you can find a relatively painless solution!
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