Zendar Posted August 11, 2013 Report Share Posted August 11, 2013 FSM says to torque the upper link screw bushing to 35-55 kg-m (253-398 ft-lb) and lower link screw bushing to 20-30 kg-m (145-217 ft-lb). Are these specs correct? I tried to torque one of the upper link screw bushings and the threads on the link just gave out... :mad: Quote Link to comment
datzenmike Posted August 11, 2013 Report Share Posted August 11, 2013 My '73 620 FSM shows a similar amount, wow that's a lot of torque.... 253 to almost 400 pounds!!! To be sure there is one on each side screwing inward with a grease nipple in the middle? correct? Quote Link to comment
Zendar Posted August 11, 2013 Author Report Share Posted August 11, 2013 Yup, one on each side, you have to screw it first to the link and torque, then screw it to the spindle. I guess I'll just have to spot weld the link to the screw bushing so it won't come loose. Quote Link to comment
Dawa Posted August 12, 2013 Report Share Posted August 12, 2013 hahaha holy shit that is a lot of torque! just checked my 73 fsm and it says the same. i cant help but feel its a typo. when did the 620s convert to ball joint? is 77 ball joint? are you referencing a 77 fsm? 720 fsm tq specs are considerably lower: upper link: 80-108 ft lb to frame, 12-16 ft lb to upper ball link lower link 80-108 ft lb to frame, 28-38 ft lb to lower ball joint Quote Link to comment
Zendar Posted August 12, 2013 Author Report Share Posted August 12, 2013 Mine is a early 77, it has kingpins. Quote Link to comment
Dawa Posted August 12, 2013 Report Share Posted August 12, 2013 ah ok. so kingpin for sure. gotcha. i think one would need a torque multiplier to get those numbers. that or convert to ball joint :) Quote Link to comment
Zendar Posted August 12, 2013 Author Report Share Posted August 12, 2013 I torque'd the other upper bushings to 210 ft-lb. Should be enough to keep them from unscrewing imo. Ball joints would be nice but the ball joint lca are a bitch to find here in Finland :p Quote Link to comment
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