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Garden Tractors and Mowers Vintage lawn and garden tractors, mowers, snow blowers, snowmobiles and other old machinery that is driven by small air cooled engines.

Garden Tractors and Mowers

David Bradley rider, tell me more about it


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  #21  
Old 12-20-2018, 03:10:52 PM
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Default Re: David Bradley rider, tell me more about it

The paint I will use is a little more green than originally used by Bradley. I have seen a Suburban with this shade of blue used and it seemed a richer looking color against the gold. Either way you can use this photo for reference. People will debate color all day long ,but I will state this important FACT. Bradley dunk painted most of their parts, this means they added paint from the cheapest paint vendor at the time to add more paint to the vat. Shades vary.
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Old 12-20-2018, 03:12:49 PM
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Default Re: David Bradley rider, tell me more about it

Last but not least, the Carb assembly. Your engine look to be a later model? I agree it isn’t the same ,but the platform dimensions will work for sure. Remember that there are I believe 1/2” spacers that are under the engine to raise it up. The engine does not bolt directly to the frame.
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Old 12-20-2018, 03:22:12 PM
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Default Re: David Bradley rider, tell me more about it

Looks like that air filter assembly will be the hardest thing to find.
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Old 12-20-2018, 03:29:15 PM
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Default Re: David Bradley rider, tell me more about it

Quote:
Originally Posted by FWurth View Post
These are really fun little tractors. We had one when I was little, First lawn mowing they let me do. The Briggs was considered quite a big engine back then, but I could manage to get it started. The trick to getting good performance from those belt drives is to use severe service belts and keep them in the correct adjustment. We had the 3pt hitch with a cultivator, sure saved me a lot of back breaking work pushing the old hand push one. That is till mom made us go back to it because of our poor driving skills that took out too many hills. We also had the front dozer blade, we put it too good use on our long road to the farm and clear the snow.
You are right about the belt adjustments. Once in order these little tractors can pull very well.

---------- Post added at 03:29:15 PM ---------- Previous post was at 03:24:21 PM ----------

I will let the one go in the picture for a good price if you pay the shipping. I don’t think I have the lower sheet metal snorkel tube though. I will pm you more information when I get back from work tonight.
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Old 12-21-2018, 03:19:10 AM
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Default Re: David Bradley rider, tell me more about it

I found the rest of the assembly!
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Old 12-21-2018, 02:43:33 PM
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Default Re: David Bradley rider, tell me more about it

Ok, the clutch removal is a little difficult on these tractors if the assembly is rusted. A puller will NOT remove the outer clutch sheave on any DB equipment!!! Your tractor is equipped with the “ball snap clutch “.

The outer sheave “pressure plate “screws clockwise onto a threaded collar with machined flats that is PINNED onto the transmission input shaft by a dowel pin “fig.18”. You can make fine adjustments of the pressure plate in or out as long as one of the two Allen set screws on the pressure sets squarely on one of the flats.

The two holes on the end of the threaded collar are used to insert a spanner wrench to aid in the removal of the outer pressure plate.

1. Loosen and completely back out both set screws on pressure plate. Failure to do so will result in damage to the treads on the threaded collar pinned onto the input transmission shaft!

2. Use your favorite penetrating oil around set screw holes and front plate assembly

3. Heat the outer hub of the pressure plate with a propane torch “add some heat not red hot heat!”.

4. Insert your spanner wrench into the two holes of the threaded collar and while holding the spanner in a fixed position try to turn the the pressure plate counterclockwise. A two foot piece of flat stock can be used as leverage across the span of the pressure plate via the lugs.

5. Repeat if necessary.


Once the pressure plate is screwed off the dowel pin that holds the threaded collar on the transmission input shaft can be tapped out so the rest of the clutching assembly can be removed. Special Note! Be careful of losing the balls located in the snap coupler!!

P.s not all pressure plates will have two set screws, but all set screws need complete removal. A spanner can be made up out of some flat metal scrap and a couple hardened bolts. The illustration below is a D.B clutch and not a exact rendering of you tractor as far as the throw out lever “fig.1”.
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Last edited by 4BadHotrodBrent; 12-21-2018 at 02:56:06 PM. Reason: Weak mind....
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  #27  
Old 12-21-2018, 10:24:44 PM
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Default Re: David Bradley rider, tell me more about it

Thanks! Info paid off and it is apart.I only have 1 ball.
That is in the clutch assembly.
So I will be looking for balls.
The plate,I got it moving back and forth and alot of travel on the lever and most of the time the clutch thing will go out but sometimes it won't.I loosened the nuts holding the plate up and give it alot of grease and worked it back and forth loose then tightened it back up.
I downloaded a manual off another site and I hope to read up on this over the weekend.
Belt that was on the reverse looks to be correct but the long belt was a 1/2 inch instead of 5/8ths so I bet it didn't work well before it was parked.
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Old 12-22-2018, 02:55:59 AM
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Default Re: David Bradley rider, tell me more about it

I’m glad that it worked out for you. More than likely someone had already been messing around with it. I believe there were 10 balls for the coupler. When I reassemble the clutch I will apply some axle grease in the collar then insert the balls so they won’t fall out. When properly assembled and adjusted that little tractor will pull till the engine stalls. The transmission is overall simple and rugged. They are simple to work on and adjust when you understand how they work.
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Old 12-22-2018, 12:09:05 PM
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Default Re: David Bradley rider, tell me more about it

As I recall, on our 725, when it first came, the belt drive worked well. After we got the motor to run correctly, we had to get the valves set correctly. After the first season we had to replace the reverse belt. Dad got a cheap belt off the rack, not the correct original part #, it lasted about the first day. Then it got to be a pain till they looked up the correct belts from the manual reference. Most over the counter small belts are what is known as fractional hp service( washing machine) and don't have any chords for strength and also tend to be too narrow as well. In our parts list manual there were numerous hand written notes as to acceptable replacements, I guess the previous owner went through that same learning process! That is the only reason these little wonders got a poor reputation back in the day. If you understand how the drive is supposed to work, you will get along just fine. One of these days I hope to find another one like we had, It was still way better than what most of the others were building at the time, and it was one of the first in the small riding garden tractors on the market, most others were only riding lawn mowers only!
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Old 12-22-2018, 12:15:43 PM
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Default Re: David Bradley rider, tell me more about it

just a off the cuff observation. I learned about these variable speed belts when working on MTD lawn tractors about the width,angle and depth in the groove and all that.
I am reading 5/8ths belts but not a particular sears number or anything? So if you get the correct lenght and 5/8ths for the drive belts it works?

Here is the reason for my question and observation.

https://www.smokstak.com/forum/showthread.php?t=168045
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Old 12-22-2018, 01:32:12 PM
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Default Re: David Bradley rider, tell me more about it

You are right about those MTD belts, we went through that as well with one of those here. But I don't think the Sears is that way, they just require the correct length and width and a really strong one that will stand the side wear in those variable speed pulleys. Lesser belts with the only chord strength being the outer welt wrapper won't last long. We have those same issues on belts for farm use on combines, they have those variable speed pulleys and are for severe service. The right belts will last for a long time if kept out of the weather and in adjustment.
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Old 12-22-2018, 06:19:56 PM
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Default Re: David Bradley rider, tell me more about it

Yes, FWurth is right about the belts. Make sure you get something simulair to A Dayco 5/8" GPL Premium Utility Belt. As mentioned a plain Jain drive belt might not even get you past a couple uses before they shred to pieces. Don’t ask me how I know that.... The premium belts cost more but they will make that tractor pull. No other special belt designs are needed.

FWurth is also right about these being great tractors. I’m not being partial ,but compared to the tractors of the same era they were far ahead of their time as far as design and implement configurations and not to mention good looks. Bradley and Sears catered to the masses and couldn’t get away with pawning off rubbish.

Once your belts and clutch are dialed in they will need little attention.
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Old 12-22-2018, 07:03:08 PM
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Default Re: David Bradley rider, tell me more about it

Ok, something like these maby?

https://www.ebay.com/itm/REPLACEMENT...w8zX:rk:1:pf:1


https://www.ebay.com/itm/SunBelt-B70...6AM:rk:10:pf:0

https://www.ebay.com/itm/Vbelt-1-2-x...b9On:rk:1:pf:1
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Old 12-22-2018, 07:26:35 PM
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Default Re: David Bradley rider, tell me more about it

Not the green or blue or brown wrapped ones. The type in the lower sub listing for the transmission drive for the Toro ZTR. Not that exact size but that type chord construction, their made for that service.

---------- Post added at 05:26:35 PM ---------- Previous post was at 05:12:37 PM ----------

My dad traded ours for an antique full size tractor back in the 70s. At the time we were more interested in that endeavor. But sometimes I think maybe we should have just bought the antique outright and kept the little sears. The antique was a model similar to the one dad had back when he got out of the Army after WW II. The little Sears was cool when it was first here, It was a easy on the posture unit to use compared to some of the others that have since ended up here. It was one of the first ones that had a genuine 3 pt hitch that really worked and had a whole lineup of handy rear mounted implements.
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Old 12-23-2018, 12:11:53 PM
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Default Re: David Bradley rider, tell me more about it

Do you have the long belt guard that covers those drive belts? It is a fairly simple design, but very important as to keep your important body parts from getting wrapped up in your work! As I recall that reverse drive is a two step process. When you pull the clutch lever back, it releases the clutch first then as you pull it further back it pulls that odd looking idler on the rear axle drive down into contact with the outside/ back side of that drive belt. I think there was a cable that connected the lever to that rear pulley assembly. That causes the axle drive pulley to turn the opposite direction and move the vehicle to back up.

Last edited by FWurth; 12-23-2018 at 01:52:23 PM.
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Old 12-23-2018, 12:47:07 PM
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Default Re: David Bradley rider, tell me more about it

No I do not have the belt guard but a freind has a machine a year or 2 newer and has the gaurd and I will be borrowing it to make a copy.
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Old 01-03-2019, 10:41:14 PM
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Default Re: David Bradley rider, tell me more about it

The local Ace hardware has a drawer of steel balls and some were the same size or just a hair bigger around than the 1 I pulled from the clutch.So I will be working on that issue some later in the week.I have a bigger ,long term project I am getting close to finishing.so the tractors have been something to give me a mental break from that other much bigger project
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Old 01-04-2019, 03:04:27 PM
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Default Re: David Bradley rider, tell me more about it

I bought a 61 DB in about the same condition where everything was seized up. Started oiling up the clutch assembly and it started to free up. With a new set of rear tires it rolls smoothly though the clutch won't disengage.
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Old 02-05-2019, 01:52:50 PM
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Default Re: David Bradley rider, tell me more about it

Well how is this for a belt guard?
I still have 1 sorda of a slot to cut in the bottom of it and I am not comfortable with the looks of the clutch lever bracket on the 1 I copied,so I left metal there for grinding and cutting off to be correct.If someone has a pic of that angle iron bracket that holds the clutch lever,I would like to see the slot that holds the lever..I am thinking this 1 I borrowed is broke off on 1 end.
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Old 02-05-2019, 04:08:17 PM
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Default Re: David Bradley rider, tell me more about it

I think there was a notch in that clutch lever bracket that held the lever in the neutral position. The lever itself had a bit of spring pressure that held it against the bracket. The one you copied isn't broken off, just worn down from the lever rubbing it.
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