[AT] John Deere Head Lead Washers

[Brian VanDragt]

The lead washers seal against any coolant that might leak by the head studs
where they thread into the water jacket.  They also act as a lubricant when
torqueing the head nuts so you get the proper tension on the head studs.
Brian

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of John Hall
Sent: Thursday, September 01, 2016 8:47 PM
To: Antique tractor email discussion group
Subject: Re: [AT] John Deere Head Lead Washers

I was thinking a seal as well. Long time ago the SEL guys taught me to use a
solder to make a seal for head bolts where the bolt cavity was in the water
jacket.

John Hall

On 9/1/2016 7:42 PM, Robert wrote:
> Long time since I rebuilt my 1948 B.  The lead washers form a seal -- 
> hence the crush you noted.  Also the pistons don't come to the deck.  
> I think the drain valves under the engine tap into the top of the bore.
> Sorry can't be of more help.  Might try John Boehm on this net.  He is 
> a JD guru.
>
> Bob Holtzer
>
>
> On 9/1/2016 11:43 AM, Ray Trimble wrote:
>>       I Just completed installing the cyl head on my 1940 B using the
lead washers. I am no mechanic but I rememberJR Hobbs being adamant that
they must be used. What is the purpose of these washers? I noticed as I came
to the required torque they started to crush and surround the nut.
>>       This tractor was stuck, I got it freed by attaching a come-a-long
to the front of the frame and the flywheel and a lot of penetrating oil
reversing the pressure on the flywheel. There was a discussion on the list
here on how to get a engine unstuck. What I saw after I got the head off I
would never run a engine after it was stuck without cleaning the cylinders.
I pulled handfuls of crap out of them, and this tractor had not been stuck
all that long.
>>       What I thought was interesting was the low compression enging. All
engines I have seen the piston comes at lest even with the deck, this engine
they came about a inch below the deck.
>>       On EBAY I ordered all three gauges for 24.00. They are new and new
(white face) from India shipment takes about a monththe last I checked the
tracking they are in Dallas. We'll see when they get here if they are worth
the money.
>>       One thing I can laugh at now. When I installed one of the pistons
in I puched it too far and the oil ring came out of the cylinder. I am lucky
that I have small hands and could get a ring compressor on it and push it
forward. Very small space and and awkward angle.
>>       Also I have never before set the clearance of the rod bearings
using shims.
>> Looking fowards to get it running.
>> RayJD 1940 bJD 1950 MTFarmall 1947 HFarmall 1949 CubAllis 1958 D10 Or 
>> D12 don't know which MF 1958 65 Propane my goto tractor
>> PS: there was a discussion about a JD 430 V, I had one and sold it about
12 years ago, put  ad in Green Mag. I had People fighting over it to buy
it.Did not make friends with the people who didn't get it.
>>
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