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John Deere Tractors Discussion Forum
Show Parts for Model:

Model A head bolt washers

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Tim [GA]

05-10-2014 10:38:07
205.144.218.234



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Rebuilding General Purpose "A" with serial number 427506. The tech manual calls for lead washers to be used with the head bolts [studs]. The overhaul kit has no lead washers and only shipped 7 copper washers and there is 9 head studs. Can regular steel flat washers be used in place of the lead washers? Or where can you purchased 9/16 copper washers? Thanks in advanced for any and all help.




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Mike(NEOhio)

05-10-2014 19:42:00
162.40.57.21



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
There's been a lot of discussion on these lead washers lately. You got 7 because there are two studs outside of the tappet cover. Leads me to think they're for oil sealing, not lube.



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forty40

05-10-2014 16:39:23
74.77.12.246



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
Quoting Removed, click Modern View to see

5 years ago I contacted ARP tech assistance about tensioning lubrication. They had qualified engine fasteners with two types of lubrication, 10W30 oil and assembly lube, both with hardened steel washers under the nuts. The assembly lube is not exotic, basically nothing more than commonly available anti-seize in paste or stick form. It is available from a number of suppliers, including most auto parts, and will provide more uniform tensioning than straight oil. If lead or copper washers are being used solely for lubrication, a throwback from 60 years ago, there certainly have been improvements in tensioning since that time. All performance engine suppliers use an assembly anti-seize lubricant for stud or bolt tensioning. As an engine builder recently told me...it does make a difference. For what its worth, probably not be much, for both racing engines and my old tractors, I use assembly lube with hardened washers.



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MT RON

05-10-2014 14:23:43
70.57.200.234



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
As Lee B said the solder works good,I've used it ona couple including a 720 3 years ago.Seems like 1.80 each for the lead is outrageous anyway.Ron



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Tim [GA]

05-10-2014 12:24:48
205.144.218.234



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
Thank you for the information. I have also found that Davenport Tractor .com also sells the washers and other 2 cylinder parts. Thanks again for the help.



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Bob

05-10-2014 11:52:03
64.255.159.192



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
Parts catalog calls for 9 K2080R lead washers.

About $1.80 each from the local DEERE dealer, who likely has them in stock.


>http://jdpc.deere.com/jdpc/JDPC/attachments.jsp?associatedPc=PC0674.pdf


This post was edited by Bob at 11:57:30 05/10/14.

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Lee B

05-10-2014 11:26:28
64.37.29.150



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 Re: Model A head bolt washers in reply to Tim [GA], 05-10-2014 10:38:07  
No substitutes please, if at the last resort you haven't located the real thing, you may roll up a single coil of 1/8 inch diameter solder around the stud and use that. Soft metal lubrication is required to reach proper torque on the nut. A steel or copper washer will interfere with achievable stud stretch and static fastener holding force. A good idea to retorque after a few thermal cycles to insure against leaks for a good long time to come as well. They do still make them, and there are posts with links to them in here as well, I just don't have it on file to hand out, sorry.

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