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John Deere Tractors Discussion Forum

lead washers?

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bandit

11-10-2003 14:31:29

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i am currerntly rebuilding the engine on my G and when i put the head on all those stupid little lead washer just started to dissentigrate as i tightened the nuts. is this supposed to happen or did I do something wrong? the old ones didnt look wrecked like mine. thanks

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11-10-2003 17:34:06

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Re: lead washers? in reply to bandit, 11-10-2003 14:31:29

I asked the same question because the JD gasket kit for my "D" had 18 washers, twice as many as I have studs. Some responses on this BB said to use two washers per stud, and others said to use one washer per stud and keep the rest.
I asked the 2 cylinder technical committee and was told to use one per stud and keep the others.

Caution - Carefully remove the excess lead that squeezes out around the nuts. The stringy bits could come loose and circulate in the oil and block up an oil passage.

Good suggestion on cleaning the back-sides of the nuts if they are burred. The head stud nuts on the "D" are different from the other nuts used on the tractor in that they have a very nicely finished mating surface.

I also use a tap and die to clean up the threads on the studs and the nuts so that I will get an accurate torque reading.

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11-10-2003 17:31:29

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Re: lead washers? in reply to bandit, 11-10-2003 14:31:29

I asked the same question because the JD gasket kit for my "D" had 18 washers, twice as many as I have studs. Some responses on this BB said to use two per stud, and others said to use one washer per stud and keep the rest.
I asked the 2 cylinder technical committee and was told to use one per stud and keep the others.

Caution - they recommend carefully removing the excess lead that squeezes out around the nuts. The stringy bits could come loose and circulate in the oil and block up an oil passage.

I also use a tap and die to clean up the threads on the studs and the nuts so that I will get an accurate torque reading.

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Glen in TX

11-11-2003 16:00:59

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Re: Re: lead washers? in reply to JC, 11-10-2003 17:31:29

Just what I found. A late 1920's or early '30s reprint of Service Manual For JD Tractors D & GP says on p.28 "Use lead washers under each nut and draw nuts up uniformly and tighten thoroughly". That is all it tells. I&T manuals says "use a new lead washer under each nut". Using 2 washers lets them turn against each other and you don't always get so much squeezed out and may not have to trim any off. Just my experience on Ds.

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Ralph

11-10-2003 15:20:50

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Re: lead washers? in reply to bandit, 11-10-2003 14:31:29

The local mechanic who has been working on the two bangers since he mustered out of the Army after the Korean War, slices off the excess lead with his jack-knife. Most of the lead is supposed to squeeze out. I'm not sure why two washers are used, maybe pack more lead alongside the stud.

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Glen in TX

11-10-2003 14:51:59

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Re: lead washers? in reply to bandit, 11-10-2003 14:31:29

Use 2 lead washers under each nut. Parts books will show needing twice as many washers as bolts but doesn't explain why. File or grind burs off back side of nuts if needed too. Be careful if you order more washers or they will send you a box of 100 or more. I have extras if you need them.

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