C609T Posted August 17, 2014 Share Posted August 17, 2014 We have a B67 that we converted to 12v and replaced the generator with an alternator, but the alternator keeps breaking the ear off that the long bolt goes through in the bottom of alternater . Everything it tight and belts are straight, does anybody have any idea what the problem could be ? Bracket not strong enough ? Any help would be appreciated. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/36717-alternator-problems/ Share on other sites More sharing options...
gearhead204 Posted August 17, 2014 Share Posted August 17, 2014 is the pully side or the rear mount failing ? also is the adjustable bushing bottomed out against the the ears? a picture or two would help ! Quote Link to comment https://www.bigmacktrucks.com/topic/36717-alternator-problems/#findComment-256256 Share on other sites More sharing options...
85snowdog Posted August 17, 2014 Share Posted August 17, 2014 I think gearhead has you pointed in the right direction. If the alternator has a SAE J-180 mount, two bottom legs and one top bolt. It is important there is movement in the bottom bushing (bottom leg farthest from fan). When installing or adjusting always tighten it last. Pics would help though, in case you have something different.Keith Quote Keith Link to comment https://www.bigmacktrucks.com/topic/36717-alternator-problems/#findComment-256289 Share on other sites More sharing options...
chief doug Posted August 17, 2014 Share Posted August 17, 2014 it shouldn't have a long bolt , two separate bolts. tighten the pulley side bolt first then the back, the adjusting bushing should slide and bottom out before it hits the ear. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36717-alternator-problems/#findComment-256317 Share on other sites More sharing options...
Freightrain Posted August 17, 2014 Share Posted August 17, 2014 A picture would help of your set up. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/36717-alternator-problems/#findComment-256330 Share on other sites More sharing options...
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