Reinstall head on 620

DanH · Posted: Fri Jan 11, 2013 5:09 pm Post subject: Reinstall head on 620

Going to reinstall the head on my 620. What is the proper torque on the head bolts and what is the proper torque pattern.

buickanddeere · Posted: Fri Jan 11, 2013 5:22 pm Post subject: Re: Reinstall head on 620

Nothing beats having a real service manual in hand for these and many other specs.
1-800-522-7448 .

tractorbafoon · Guest Report to Moderator

175lbs of torque, start from the center and work your way out clockwise, then do it again, run the tractor and get it warmed up for a good hour or so, then retorque them,

Pete in MD · Posted: Fri Jan 11, 2013 7:03 pm Post subject: Re: Reinstall head on 620

Mr. Thinker's Almanac says 150# for the heads on 620/630s.

jdman(MO) · Posted: Fri Jan 11, 2013 7:46 pm Post subject: Re: Reinstall head on 620

I wish they would made one for the 70 gas.

wilamayb · Posted: Sat Jan 12, 2013 5:58 am Post subject: Re: Reinstall head on 620

There was never a SM produced for the 620/630. The substitute would be the 60 which is fairly different, or the 720 which is also pretty different.

I'm totally agree that a guy needs a set of manuals for every piece of equipment that he owns, but in this instant it is not possible.

The only way this info could be gathered would be from service bulletins. You can't get those @ 800-522-7448.

Btw. The quality of Deere manuals leaves much to be desired. The paper is thin, printing is smudged and the price is silly. Why not suggest these two cylinder and new gen guys to buy their manuals from an aftermarket place that actually strives for quality? Some how these aftermarket folks are able to make clearly printed manuals on thick paper for half the cost of Deere. It's a no-brainer.

Gene Hillman · Regular Joined: 30 Jul 2009 Posts: 42 Report to Moderator

It's always a good idea to do the torquing three times by thirds. If the final torque is 150 ft. lbs. then do 50 all around, 100 all around and 150 final. This brings the casting down gradually

Handsome Jim · Posted: Sat Jan 12, 2013 9:48 am Post subject: Re: Reinstall head on 620

I bought one of those re-production IT manuals for a MT from the dealer. Had more info on Bs & As than vertical engines.

wilamayb · Posted: Sat Jan 12, 2013 10:10 am Post subject: Re: Reinstall head on 620

I'm not speaking of IT manuals but, rather of better reprints of the original manuals than Deere is willing to provide.

I am in no way and advocate for IT manuals.

buickanddeere · Posted: Sat Jan 12, 2013 11:45 am Post subject: Re: Reinstall head on 620

The IT makes a fine wrapper to keep grease off the JD service manual. Or to prop doors or windows open.
The IT manual has just enough info to get some folk into trouble.

kj@junction · Guest Report to Moderator

B & D I had a 620 for a short time and mother deere had no manuals for it. I wanted mine for light work but it had some issues that IT didn't address I asked for some advice one here got blown off guess what I found a guy that wanted one to retore and actually made 50 bucks off it.

55deere70 · Posted: Sat Jan 12, 2013 5:25 pm Post subject: Re: Reinstall head on 620

I can't find a JD service manual for 70 gas. To my knowledge, none were printed.

buickanddeere · Posted: Sat Jan 12, 2013 5:41 pm Post subject: Re: Reinstall head on 620

I doubt if anybody intended to blow you off.
There are some mooches that want all the info free and easy, won't purchase a service manual. Don't have a whole lot of time for them.
The 60 service manual will be sufficient.

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