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John Deere Tractors Discussion Forum

JD B tourque specs.

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B Man

06-25-2007 06:37:05

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1944 JD "B" I need the tourqe specs for the head and the "rocker arm" asembly.

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johnlobb

06-25-2007 16:40:44

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Re: JD B tourque specs. in reply to B Man, 06-25-2007 06:37:05

When I did my '50 B last year the JD dealer I bought a lot of stuff off of said, "Oh, by the way, there is a new torque setting on the head nuts on the B's now. It is 105 ft lbs instead of the 96 ft lbs." Maybe its because of the type of head gaskets used now. Also do not forget to put the lead washers under the head nuts before you torque it all down. John Lobb

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P Browning

06-28-2007 13:01:18

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Re: JD B torque specs. in reply to johnlobb, 06-25-2007 16:40:44

B Man -- I meant to point out that the torque setting you describe as NEW -- was new back in August 1949 -- when it was announced by Deere & Company to JD service men in Field Service Bulletin 163-S. Now - that's nearly six decades back! Your post reads (to me) as if this fact was just discovered.

I also point out to all that torque specifications are written probably more to protect from over-tightening than anything else, and that regardless of heat-treated studs, the old, lower torque specification should work out just fine.

Clean & lubricated stud (and stud nut) threads plus flat surfaces are far more important than a few more foot-pounds of torque, and you can take that to the bank! (PatB)

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P Browning

06-25-2007 16:59:59

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Re: JD B tourque specs. in reply to johnlobb, 06-25-2007 16:40:44

The head bolt torque difference comes with new & improved heat-treated studs which started at 628889 for series "A" tractors, and 248284 for series "B" tractors. (PatB)

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P Browning

06-25-2007 11:09:28

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Re: JD B tourque specs. in reply to B Man, 06-25-2007 06:37:05

B Man -- To read torque spec's (a Deere Release) for all Waterloo tractors, go to the John Deere Model H Restoration Site (Below). Once there, look left -- scroll down to TORQUE VALUES.

As for setting tappets to 0.020 HOT, set them (rather) to 0.022 while at ROOM TEMPERATURE and they will come in at 0.020 when at 190 �F. This is an old rule many JD service men used over the years -- and it still works. (PatB)

Restoration Site, JD-H

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CLW

06-25-2007 08:52:31

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Re: JD B tourque specs. in reply to B Man, 06-25-2007 06:37:05

The I&T manual says 96 ft-lbs for the head but I can't find anything on the rocker arms other than overhaul and setting the tappets to 0.020 (hot).

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B Bob

06-25-2007 10:51:09

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Re: JD B tourque specs. in reply to CLW, 06-25-2007 08:52:31

Thanks

The rocker arms is a cast piece that connects on the ends of bolts from the head. Maybe there is no setting. I guess I'll make them tight and set the gaps to .020 and see what happens.

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