Proud new owner of a 40c

Show us pictures of your JD crawler and attachments.
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mathpaquet
MC crawler
MC crawler
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Joined: Sun Aug 28, 2016 6:50 pm
Location: Quebec, Canada

Proud new owner of a 40c

Post by mathpaquet » Mon Sep 19, 2016 7:05 pm

Hi there! Just got arround to buy me a 40c...thought it'd be useful for skidding lumber on my land. Here are a few pics, let me know what you think:

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It's my first experience with such a thing so I'll probably have a bunch of questions for you oldtimers. Why not start now!

I got the PDF file for the parts manual here (thanks jtrichard), anybody's got service and/or operatormanual? On the short term, I'm mostly interested about fluid type and capacity for tranny, engine, radiator, etc...

Also, I can't find the serial number on the little guy, where is it?

Now, I don't know if you can see on the pictures above, but the sprocket assembly isn't the same on both sides. One's got a big nut and the other is just a concave cap. Could it be from different models (ex. 420c or 1010)?

Speaking of which, can I use steering clutch steel and fiber discs from a 420, 1010, or else on the 40c? These seem more easily available arround here.

Ok, enough for now. Thanks!

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Lavoy
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Post by Lavoy » Tue Sep 20, 2016 12:14 am

Someone has put the final drive from a 3 roller 40 or an MC on the LH side. Your crawler has 1010 rails which have a bigger bushing than a 40, so you will be really riding up on the bushings with your left side. You should look for another 420 sprocket to put on the LH side.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

mathpaquet
MC crawler
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Joined: Sun Aug 28, 2016 6:50 pm
Location: Quebec, Canada

Post by mathpaquet » Tue Sep 20, 2016 7:20 pm

Thanks for the response, Lavoy…though I’m not sure I got this 100% straight.

From my understanding, I got both chains from a 1010, LH final drive (including sprocket) from an early 40 or MC, RH assembly is 4 roller 40, right? Now how come I should only switch the LH side sprocket if the 40 sprocket doesn’t fit the 1010 chain?

Pardon my ignorance, but I’m confused here.

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jtrichard
350 crawler
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Post by jtrichard » Tue Sep 20, 2016 11:23 pm

The way I read what Lavoy said is that you have A 420 sprocket on the right side that fits the 1010 chain and a MC or 40 sprocket on the left that does NOT fit the 1010 chain so you need a 420 sprocket on the left side
2010 with 622 dozer with mod. 35 ripper and a 2010 with 622 dozer bought in 1969 and a 2010 loader with drott and mod. 36 ripper

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Lavoy
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Post by Lavoy » Wed Sep 21, 2016 8:24 am

Correct.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

mathpaquet
MC crawler
MC crawler
Posts: 3
Joined: Sun Aug 28, 2016 6:50 pm
Location: Quebec, Canada

Post by mathpaquet » Wed Sep 21, 2016 6:45 pm

Alright! I think I get it now... and it's quite obvious looking back at the pictures.

I've done my homework and looked up the MC, 40, 420, and 1010 parts catalogs. So the MC and 40 have the same sprocket, earlier 40 share the final drive assembly with MC, later ones with the 420. 1010 has got it's own final drive but same sprocket as the 420

8)

Thanks guys!

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Stan Disbrow
350 crawler
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Post by Stan Disbrow » Wed Sep 21, 2016 7:17 pm

Hi,

And, next, you can add that the 350 rails will work if you cut the teeth off the 420 sprocket and weld on a 350 rim sprocket. Might as well have all the data! ;)

Stan
There's No Such Thing As A Cheap Crawler!

Have: '58 JD 420c 5-roller w/62 inside manual blade
Have: '78 JD350C w/6310 outside manual blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Also Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)

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