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M38 Clutch pressure plate to flywheel
Posted: Wed Jun 06, 2018 4:21 am
by Brumbach
What are the torque specs for the six connecting bolts? Can't seem to locate them. 12-17? Thanks in advance.
Posted: Wed Jun 06, 2018 8:31 pm
by wesk
As a general rule in maintenance, anytime a procedure does not list a torque for a fastener and the fastener is not listed in the manuals torque listing then proceed to a "Standard Torque Chart for the grade fastener being torqued and use that figure. You must know the grade (IE grade 5 or grade
and the size/thread pitch of the fastener. Go to the ORD 9 SNL G-740 page 52 and you find the bolt (Or screw if you believe the parts list) is a Screw, cap, hex-hd, 5/16-18NC-2x1 1/16.
You can google up a "Standard Torque chart for a Grade 5 bolt or use one from my photo album. I would suggest you go to my album on torque and print the 5 pages shown there. Study them and then select an appropriate torque from the page 5 chart.
http://www.willysmjeeps.com/v2/modules. ... _album.php
I know these WWII series manuals up thru the 50's lack a general torque chart but the Army finally got their act together in the late 60's and started including them.
Posted: Thu Jun 07, 2018 10:24 am
by rgmutchler
According to the Willys service manual SM1002-R6 the clutch pressure plate to fly wheel torque is 12-17 and the flywheel to crank torque is 35-41
Posted: Thu Jun 07, 2018 12:53 pm
by wesk
Good catch RG. I missed that when I looked in SM 1002 torque list page 285. For some reason they list the flywheel under the "Engine" section and the pressure p[late under the "Chassis" section.
Brumbach,
I have that chart in my photo album under SM-1002:
http://www.willysmjeeps.com/v2/modules. ... _album.php
Chapter U Misc.:
http://www.willysmjeeps.com/v2/modules. ... _album.php
