tkobes43 Posted April 15, 2011 Share Posted April 15, 2011 What is the voltage on a 59' Mack Thermodyne B61? Quote "Nothing Breaks Wind Like A Bulldog" Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/ Share on other sites More sharing options...
220cummins Posted April 15, 2011 Share Posted April 15, 2011 What is the voltage on a 59' Mack Thermodyne B61?if theres a switch under the seat its 24v. Its called the series paralell switch. A lot of guys eliminate them and covert to 12v. There are no headaches when you convert. If there is no switch under the seat then someone did you a favor and converted the truck to 12v. Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76162 Share on other sites More sharing options...
Mike Posted April 15, 2011 Share Posted April 15, 2011 if theres a switch under the seat its 24v. Its called the series paralell switch. A lot of guys eliminate them and covert to 12v. There are no headaches when you convert. If there is no switch under the seat then someone did you a favor and converted the truck to 12v. Amen and Amen on that one. I was not one of the lucky ones. The truck I bought had a bad switch and had to jump the poles with a big screwdriver to start it. Put a new switch on and almost caused a fire. Smoke was coming from inside the cab. Then had to get some wiring done and another new parallel switch. Just a little over $800.00 bucks worth. Note To Self, Buy your switch from a starter and generator shop, they will at least exchange it for yours. mike mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76163 Share on other sites More sharing options...
tkobes43 Posted April 15, 2011 Author Share Posted April 15, 2011 I'm assuming the switch is easy to spot. Its not hidden? I'm looking right now and don't see anything. Quote "Nothing Breaks Wind Like A Bulldog" Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76166 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 I'm assuming the switch is easy to spot. Its not hidden? I'm looking right now and don't see anything. Just as 220 cummins said. It is inside of a rectangle box, which have hood latches, one in front and one in back of the box. If you cannot find it then trace your battery cables toward under the cab. Some switch covers are missing on trucks thru the years. Hope this picture helps. mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76176 Share on other sites More sharing options...
Rob Posted April 16, 2011 Share Posted April 16, 2011 I'm in the minority but I like the higher voltage starting circuits. If I had my druthers, all motor vehicles would have 48VDC electical systems. Parts could be smaller to deliver the same performance and this is still low potential so it's not really dangerous to work around.Put a 42MT series starter on the truck and run 2/0 battery starting cables and you will be set. Dual group 31 series batteries provide enough cranking amperage to get the job done.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76179 Share on other sites More sharing options...
theakerstwo Posted April 16, 2011 Share Posted April 16, 2011 I'm in the minority but I like the higher voltage starting circuits. If I had my druthers, all motor vehicles would have 48VDC electical systems. Parts could be smaller to deliver the same performance and this is still low potential so it's not really dangerous to work around.Put a 42MT series starter on the truck and run 2/0 battery starting cables and you will be set. Dual group 31 series batteries provide enough cranking amperage to get the job done.Rob If i had my druthers trucks would be wired with 440 and inside of conduit piping.Wonder how many knife blades would be burnt off.Or drivers denutted. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76180 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 If i had my druthers trucks would be wired with 440 and inside of conduit piping.Wonder how many knife blades would be burnt off.Or drivers denutted. Glenn, You say DENUTTED.....are we talkin about any particular squirrel we know? mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76183 Share on other sites More sharing options...
Rob Posted April 16, 2011 Share Posted April 16, 2011 If i had my druthers trucks would be wired with 440 and inside of conduit piping.Wonder how many knife blades would be burnt off.Or drivers denutted.If you put 440 VAC against a guys testicles they don't even bleed when they explode and come apart.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76185 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 If you put 440 VAC against a guys testicles they don't even bleed when they explode and come apart.Rob If I recall, either 440 or 480 will break bones and can grab ya if too near. mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76187 Share on other sites More sharing options...
Rob Posted April 16, 2011 Share Posted April 16, 2011 If I recall, either 440 or 480 will break bones and can grab ya if too near. mikeYes it will freeze muscles into spasms almost immediately. It is not bad to work around however. Proper safety precautions need looked into prior to reaching in. Several of the equipments I work with use this, and much higher potential for operation. Above 50 VAC, or DC is capable of jumping a "gap" between conductors. This is why anything greater than 48 volts will be prohibited in automobiles. Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76188 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 Yes it will freeze muscles into spasms almost immediately. It is not bad to work around however. Proper safety precautions need looked into prior to reaching in. Several of the equipments I work with use this, and much higher potential for operation. Above 50 VAC, or DC is capable of jumping a "gap" between conductors. This is why anything greater than 48 volts will be prohibited in automobiles. Rob Yes Rob, our Chiller runs off the big power of 480 volts. It sure can get your attention when it comes on. I downloaded pictures of the chiller and air handlers at the building for ya 2 years ago, but never until now had a reason to show you. Oh yea and also the Cummins 50KW Generator with Turbo....Made In Brazil.I'll have to look for the photo's thinking my g/f has them in her computor. mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76189 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 Here is that picture of the Cummins generator at work. mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76190 Share on other sites More sharing options...
Rob Posted April 16, 2011 Share Posted April 16, 2011 Here is that picture of the Cummins generator at work. mikeM-11 series Cummins. A pretty good and stable platform to operate with. Must be an older set as since the acquisition by Cummins of D.W. Onan company, all gensets have been painted Onan green.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76201 Share on other sites More sharing options...
Mike Posted April 16, 2011 Share Posted April 16, 2011 M-11 series Cummins. A pretty good and stable platform to operate with. Must be an older set as since the acquisition by Cummins of D.W. Onan company, all gensets have been painted Onan green.Rob This unit was installed in the basement in 1985, so it may be a 1984 Cummins. The building was constructed in January 1985 and moved office furniture in by March 1985. I was running it each wednesday for several years but since the economy has gone sour ya know the answer. It has an hour meter but I have forgotten what it is. I do know, it has very little hours on it. I had the underground tank filled last year and they sent out one of their genious workers and he over ran the tank and it caused an overflow inside of the building and fuel was running down the hall. Man did I have a mess to clean up. Ya have to stand and watch every move someone makes today. I probably will be gone before it needs filling again. mike Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76207 Share on other sites More sharing options...
Rob Posted April 16, 2011 Share Posted April 16, 2011 This unit was installed in the basement in 1985, so it may be a 1984 Cummins. The building was constructed in January 1985 and moved office furniture in by March 1985. I was running it each wednesday for several years but since the economy has gone sour ya know the answer. It has an hour meter but I have forgotten what it is. I do know, it has very little hours on it. I had the underground tank filled last year and they sent out one of their genious workers and he over ran the tank and it caused an overflow inside of the building and fuel was running down the hall. Man did I have a mess to clean up. Ya have to stand and watch every move someone makes today. I probably will be gone before it needs filling again. mikeHave an oil distributor come by and dump an algacide into the fuel if stored that long. Algae grows in diesel fuel that is not consumed and plugs filters.I'm thinking Cummins acquired Onan in 1987 or so.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76216 Share on other sites More sharing options...
macktruckEd62 Posted April 23, 2011 Share Posted April 23, 2011 I'm assuming the switch is easy to spot. Its not hidden? I'm looking right now and don't see anything.if you need this too, i know where to get this its in conneticut i ended up replacing mine but like the other guy said go to 12 volts this switch is big like a gm starter. Quote SMOKEY Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-76560 Share on other sites More sharing options...
mowerman Posted May 6, 2011 Share Posted May 6, 2011 do yourself a favor,,get rid of all that wiring like i did,,and put in an air starter,,problem solved,,for around $1000 bucks.for everything,,or if your interested i can turn you on to someone that has a complete setup second hand,for sale,,bob Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-77406 Share on other sites More sharing options...
JeffNichols Posted August 28, 2011 Share Posted August 28, 2011 Does a 1966 B75 use this same setup? Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-84549 Share on other sites More sharing options...
220cummins Posted September 1, 2011 Share Posted September 1, 2011 Again look for the box under the seat or whats in the box under the seat. the pictures above are what it will look like. Quote Link to comment https://www.bigmacktrucks.com/topic/18751-59-mack-b61-starter/#findComment-84828 Share on other sites More sharing options...
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