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(2) broken distributor caps

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working the 8n

03-28-2001 15:47:48

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OK, first I'll admit that I'm an accountant and not very experienced when it comes to mechanics, though I do give it my best. I've got a 49' 8N that I purchased primarily to grade my mile long private road. I decided to be brave and give it a tune up, which was actually quite successful. When I removed the distributor cap the #2 position basically crumbled into the spark plug wire leaving plastic in the wire. Having replaced the cap and having the tractor running like a champ I was quite pleased. Yesterday, just after 20 tons of limerock were dumped in my road, the tractor seemed to loose power. I looked down to see the #2 wire dangling with plastic from the dist. cap. I was able to get the job done (the wire would hold for about 5 minutes at a time) but I am wondering why the same part of the cap would fail again. This board, and its archives, have helped me tremendously, but his one seems to stump me. The tractor has been converted to 12V and the alternator belt runs quite close to the #2 wire, but I can't figure out why it could actually cause the cap to break. Any ideas would be most appreciated. Thanks to everyone for their posts. Accountants like me appreciate it.

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ZANE

03-29-2001 17:34:15

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

The axle is hitting the dist cap because the center pin bushing is worn.

The fastest way to fix it so it won't break the dist cap is to jack up the left side of the front axle as far as it will go and then look at the impression in the front axle support bracket where the axle strikes when it is this position with the right side all the way up. Weld a 2X2 inch piece of flat iron bar stock at the spot where it strikes the support. It will not be able to travel enough to hit the distributor cap then.

I did one just last week. After wards the axle lacked about an inch and a half hitting the dist cap.

Or you can take a week and a lot of trouble and pull the axle and the radius rod pins and wrestle that awarkward thing around and try to get a new bushing in the axle which will have to be reamed after it is installed because they don't come to fit the pin because they are usually damaged when installed in the hole in the axle. It is also possible that the hole is already so over worn that even a new bushing will just flop around in the hole. Then you will have to hunt up another center part of the axle and hope it isn't in the same shape and the one you have.

Just weld in a piece of bar stock and get on with it!

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Hawk (TN)

03-30-2001 03:41:59

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Re: Re: (2) broken distributor caps in reply to ZANE, 03-29-2001 17:34:15

I had to fix the same problem last month. The center hole was egg shaped. The local bone yard wanted $100.00 for used center and $400.00 for new. I took the center piece to a local machine shop where they filled in the hole, rebored it, and pressed the bushing in. All this took less than 20 min and cost me $25.00. The shop owner said he had fixed lots of them like this and knew what to do. It works fine now.
Hawk (TN)

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Larry 8N75381

03-29-2001 13:13:19

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

If you want to see how the axle will hit the distributer, get a jack and jack up the right side of the axle. BE CAREFUL, as you get near the top, no point in causing further damage. With the axle at the maximum "tilt" it will be in the right place to "get" the #2 distributer socket. Did on mine, too.

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Dell (WA)

03-28-2001 19:52:00

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

less see, debits is on the window side (grin).

And broken frontmount distributor caps are caused by worn front axle kingpin.

There have been some reports of a temporary fix by wide-ing out the front axle one or two holes both sides the same. Reset your toe-in back to the witness marks. This is a cheep and eazy fix and if'n it don't you'll still have to replace your kingpin..... .Dell

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Dennis 9N/2N

03-28-2001 18:19:04

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

While checking around, try to determine if the radius rods are loose where they pivot on the sides of the tractor. Excessive play here will let the axle move back against the distributor, which will be even worse when the right front wheel is raised. Several "fixes" for loose radius rods can be found in the archives. Hope this helps!

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Pitch

03-28-2001 17:09:46

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

Jim(MO) is right the king pin is located in the center of the front axle assembly, when it becomes worn the axle will bump the distributor cap and breaks the #2. I need to replace mine also but have been procrastinating. The parts to do the job run about $40.00. From what I have read here and elswhere the job is technically simple but 50 years of wear and tear can make things difficult. There was just a post yesterday or the day before on this very subject. Good Luck.

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Jim (MO)

03-28-2001 16:39:31

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Re: (2) broken distributor caps in reply to working the 8n hard, 03-28-2001 15:47:48

Sounds like the pin, king pin I think its called,and the associated bushings that the two front axel halves rotate on are worn. This allows the right axel to swing back enough to break the distributor cap. Might do a search on "pin" or "king pin" for more professional advice.

LOL
Jim

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