Good_Ole_JR Posted June 1, 2000 Share Posted June 1, 2000 I am having to switch out engines on my 3212v. I need to know what the torque setting is for the 3/8 inch bolts that connect the driveshaft to the flywheel. I want to get these bolts tight, I don't want to strip out the threads and too much damage would result if I didn't get them tight enough. This is where the fiber disc goes between the driveshaft and the flywheel. Link to comment Share on other sites More sharing options...
AGCO918 Posted June 2, 2000 Share Posted June 2, 2000 The spec is what we call "snug". You know - just before the breaking point >. I guess the standard torque rule would apply but sorry I don't know it. Any engineers......? MSDs?...... Link to comment Share on other sites More sharing options...
Guest Posted June 2, 2000 Share Posted June 2, 2000 From the Safety and General Information of the Kohler OHC engine manual the specifications for 3/8" bolts are: 3/8 -16 Grade 2: 260 in-lbs. (21.6 ft-lbs.) Grade 2 has no hardness marking on the bolt head. 3/8--24 Grade 2: 300 in-lbs. (25 ft-lbs.) 3/8-16 Grade 5: 35 ft-lbs. Grade 5 has 3 hardness hash marks on the head. 3/8-24 Grade 5: 40 ft-lbs. 3/8-16 Grade 8: 50 ft-lbs. Grade 8 has 6 hardness hash marks on the head. 3/8-24 Grade 8: 60 ft-lbs. In all likelyhood the bolts are 3./8-16, Grade 5. But, if you are not sure use the Grade 2 torque specification. If I recall my B-1, with fiberglass disk coupling, has lock washers on the coupling bolts. At the very least make sure the lock washers are flattened completely. Hope this helps, Roy Link to comment Share on other sites More sharing options...
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