HeavyGunner Posted January 31, 2016 Share Posted January 31, 2016 My delco switch crapped out on my truck last time I tried to start it. Does anyone have a direct fit 12 volt starter part number for my ENDT673? Are there any other changes that I need to make if I convert the starter to 12v? I've heard it's easier to convert to 12v rather than find a delco switch to replace mine with. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/ Share on other sites More sharing options...
phildirt Posted January 31, 2016 Share Posted January 31, 2016 40MT 12 volt starter. I used the upper solenoid of the 12-14 switch to engage the starter. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322444 Share on other sites More sharing options...
eddeere Posted January 31, 2016 Share Posted January 31, 2016 A 42MT or 39MT starter should work. Be sure it is a 11 tooth. I used a 42 MT it fit but was close to every thing and had to bend the vent pipe slightly. A 39 might have worked better. The starter shop where I got mine had both. They said the 39 was a gear reduction and had more torque and the 42 would spin faster. With a used engine I did not think torque was an issue. They also gave me a solenoid to mount on the firewall to be sure there was ample voltage to the starter solenoid. There was a post on this dated 14 Nov 2014 which has a lot of good information. The electrical part is straight forward. Just by pass the series parallel stuff in short. Quote Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322445 Share on other sites More sharing options...
HeavyGunner Posted January 31, 2016 Author Share Posted January 31, 2016 Thanks for the info guys. With parts stores being 60+ miles from me and my Mack 3.5 hrs away I want to be sure and get the right parts the first time before I head over the mountains to work on it. 40MT 12 volt starter. I used the upper solenoid of the 12-14 switch to engage the starter.So I can use my existing delco switch, but just the upper 12v solenoid even though the 24v switch crapped out? Thanks again for the help. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322481 Share on other sites More sharing options...
eddeere Posted January 31, 2016 Share Posted January 31, 2016 Not sure what the Delco switch is. Is this the series parallel switch/solenoid ? If your starter is good Watt's has them for $150. My starter was bad so I just went to a 12 volt starter. Quote Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322516 Share on other sites More sharing options...
phildirt Posted February 1, 2016 Share Posted February 1, 2016 Yes-- you can use the solenoid on the 12/24. You still use the existing wiring to the starter switch and eliminate the 24v side. Quote Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322519 Share on other sites More sharing options...
HeavyGunner Posted February 2, 2016 Author Share Posted February 2, 2016 Not sure what the Delco switch is. Is this the series parallel switch/solenoid ? If your starter is good Watt's has them for $150. My starter was bad so I just went to a 12 volt starter.Yes the parallel switch. It's not much more for a 12v starter. Found one for $167+ free shipping. So I'm leaning towards going 12 volt. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322753 Share on other sites More sharing options...
Vladislav Posted February 2, 2016 Share Posted February 2, 2016 As far as I realized a series parallel switch has two groups of contacts.Those ones it connects to make 24 volts are heavy ones.The other pair are smaller and designed to hold a battery charge current only.So as I figured out the said above you can use the big set of contacts in relay to switch on your starter. As just a switch, no series function.The other set of contacts shows no need. Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322754 Share on other sites More sharing options...
HeavyGunner Posted February 2, 2016 Author Share Posted February 2, 2016 Thanks Vlad Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322755 Share on other sites More sharing options...
41chevy Posted February 2, 2016 Share Posted February 2, 2016 Yes the parallel switch. It's not much more for a 12v starter. Found one for $167+ free shipping. So I'm leaning towards going 12 volt.With the modern battery technology the 24 volt system is not really needed. A cheapo 12 Volt battery has more CCA and reserve than what the truck originally came with. 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/43796-looking-for-a-starter-pn/#findComment-322760 Share on other sites More sharing options...
HeavyGunner Posted February 2, 2016 Author Share Posted February 2, 2016 With the modern battery technology the 24 volt system is not really needed. A cheapo 12 Volt battery has more CCA and reserve than what the truck originally came with. PaulGood to know. So converting to a 12 volt starter will save me from having to buy 2 batteries as well. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322769 Share on other sites More sharing options...
HeavyGunner Posted February 3, 2016 Author Share Posted February 3, 2016 One more question about the starter. One of the 12volt starters is clockwise only and the other can be bought to turn in either direction so I assume I want an 11 tooth clockwise turning starter. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-322872 Share on other sites More sharing options...
eddeere Posted February 4, 2016 Share Posted February 4, 2016 Clockwise I think. Look at your fan blades to see which way your engine turns and figure it from there. Quote Link to comment https://www.bigmacktrucks.com/topic/43796-looking-for-a-starter-pn/#findComment-323030 Share on other sites More sharing options...
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