Torque specs

brentb · Jan 19, 2022

Can anyone tell me where I can find the torque specs for the flywheel and also the specs for the pressure plate to flywheel for a David brown 1390. I have the shop manual and cant find nothing there. Thanks

chuck machinist · Jan 19, 2022

What is the diameter of the fastener [bolt] and threads per inch TPI? Then I can answer your Inquiry. CM

DKase · Jan 20, 2022

Also need to know the hardness of the bolt.

brentb · Jan 20, 2022

I dont have the tractor here

RGMartin · Jan 21, 2022

I haven't seen it published anywhere. The flywheel nuts are 7/16 fine, I usually go to 50 foot pounds, then make sure the locking tabs are bent over well.

The clutch cover bolts are 3/8 NC, 30ftpds is probably fine, I never torqued them, just a bump from the impact then check for tightness. I always use new grade 8 lock washers on them.

joestewart · Jan 21, 2022

I found the reference for the flywheel at least. Click on the following link and go to section 2135. Then scroll down to the second to the last page of the manual. It says 50 ft-lbs for the flywheel nuts.
Crankshaft, Main Bearings, Flywheel & Oil Seals Four Cylinder Engines

Torque specs

brentb

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chuck machinist

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DKase

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brentb

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RGMartin

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joestewart

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