609albert Posted February 5, 2013 Share Posted February 5, 2013 I have a 54 mack LS85 ,during restoration lost the main cartridge fuse that was on the firewall in the porclian holder ,which I still have, just need to know size rating of the fuse and where to purchase, I;ve tried a 30 amp fuse and it blows, probably need a 50 or 60 amp but can't find one in the small diameter to fit into the holder. Quote Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/ Share on other sites More sharing options...
farmer52 Posted February 5, 2013 Share Posted February 5, 2013 Just guessing here...could it be a "slow blow" fuse? Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-161958 Share on other sites More sharing options...
fxfymn Posted February 5, 2013 Share Posted February 5, 2013 That fuse is probably for the radio, not the truck. You really don't need it, so any fuse that fits will work. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162075 Share on other sites More sharing options...
41chevy Posted February 5, 2013 Share Posted February 5, 2013 Just out of curiosity, but where does the wire go to in the cab? Is it for a piece of electronics that was removed? If there was no demand the 30 amp should not have blown. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162138 Share on other sites More sharing options...
609albert Posted February 6, 2013 Author Share Posted February 6, 2013 the incoming cable comes from the cole/harst selector switch (either a or b set of batteries), then other side of fuse to the starter,I have to check that for sure tomorrow. Quote Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162254 Share on other sites More sharing options...
609albert Posted February 8, 2013 Author Share Posted February 8, 2013 actually it goes to the soleonoid and then the starter..... Quote Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162765 Share on other sites More sharing options...
fxfymn Posted February 8, 2013 Share Posted February 8, 2013 It was probably added after the truck was built. You may want to consider using a hidden circuit breaker somewhere in the circuit to maintain the authenticity. If you still want to retain the original holder I would make a "dummy" fuse and still use the circuit breaker. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162830 Share on other sites More sharing options...
609albert Posted February 9, 2013 Author Share Posted February 9, 2013 fxfymn , I also was thinking of the same thing that you suggested ,a circuit breaker in line before the one on the firewall. thanks to ALL Quote Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-162987 Share on other sites More sharing options...
41chevy Posted February 9, 2013 Share Posted February 9, 2013 It was probably added after the truck was built. You may want to consider using a hidden circuit breaker somewhere in the circuit to maintain the authenticity. If you still want to retain the original holder I would make a "dummy" fuse and still use the circuit breaker.I was going to suggest that, I have more faith in high draw systems for breakers. Keep us posted. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/29796-main-fuse/#findComment-163062 Share on other sites More sharing options...
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