BARD8868 Posted October 23, 2012 Share Posted October 23, 2012 Hi new to the forum and was looking for some tips and guidence for a 1965 Mack I'm getting started back up.It's a 65 C-609T Mack. My question is to do with the battery setup. It had 2 battery trays with two 6volt batteries run in a series to make up 12volts from each tray that runs into a series parallel switch. The starter is a 24 volt starter and all other components run on 12 volt. My question is since the 6volts batteries need replaced can I use two 12 volt batteries one in each tray to replace the two 6volts that were once in both trays ? I'm not certain this will work but wanted to get some opinons or if someone has done this. If the two six volts in series are producting 12v from each battery tray wouldn't one 12 volt work in both trays and be the same setup? thanks, JR Quote Link to comment Share on other sites More sharing options...
220cummins Posted October 23, 2012 Share Posted October 23, 2012 Do yourself a favor and get rid of the series parallel switch. Convert to a 12v started and alternator setup. You will like it way better. Quote Link to comment Share on other sites More sharing options...
220cummins Posted October 23, 2012 Share Posted October 23, 2012 BTW that's a nice looking truck you have there! It must be C-Model season. They keep popping up right and left on BTM! Quote Link to comment Share on other sites More sharing options...
Apple dog Posted October 23, 2012 Share Posted October 23, 2012 I used to have a truck with a series parallel switch and they are junk. Covert it to a 12 volt system and do away with that parallel switch. You will be alot happier with the truck. Quote This is Mack country. On a quiet night you can hear a peterbilt rust away. Link to comment Share on other sites More sharing options...
Freightrain Posted October 23, 2012 Share Posted October 23, 2012 Welcome aboard. Pretty nice looking C.Yes, you could just stick a 12v battery in each side and likely will start without too much issue. Plenty of guys still have 12/24 starting, but if you plan on using it regularly, then swapping it to 12v is a better deal. Install an alternator and change it over to NEG. ground so regular accy's are usable.I fought with my truck the first summer with original series/parallel switch, then switched it over to 12v starter and run two 12v batteries. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
Vladislav Posted October 23, 2012 Share Posted October 23, 2012 It isn't really matter to use 2 of 6V or 1 of 12V. At the moment I easily start my R with 673 E6-350 with only one 12V battery and also start from time to time the army truck with 707 gasser with only one 12V car capacity battery. During a summer. Although it's better to have a pair of 12V parallel truck size boxes.Vlad Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment Share on other sites More sharing options...
BARD8868 Posted October 23, 2012 Author Share Posted October 23, 2012 Thanks for all the responses, I may just go with the 12v on each side for now the truck is stored in a heat controlled warehouse and isn't used anymore. Its my grandfathers and I'm just fixing some odds and ends as well as changing fluids getting her ready to fire up again. Its been about 15yrs since it has fired. Reason I was wondering about batteries I have 12v at hand for our fleet rather then going out and buying four new 6volts. But I totoally agree if this was a regularly started truck I would ditch the series parallel switch. I just wanted to make certain the two 12v batteries would crank her over instead of the 4 6v in series. Quote Link to comment Share on other sites More sharing options...
daveigou Posted October 23, 2012 Share Posted October 23, 2012 JR, I'm just up route 23 from you. I had heard about that truck but I never saw it. I have a rebuilt SP switch if you wanted to try it. (2) 12V batteries should work just fine. If you need a hand, send me an email d.igou@gerhartmachinery.com and I'll give you a cell phone #.Dave Quote See my Flickr photostream page http://www.flickr.com/photos/96692978@N05/ Link to comment Share on other sites More sharing options...
mowerman Posted October 23, 2012 Share Posted October 23, 2012 Thanks for all the responses, I may just go with the 12v on each side for now the truck is stored in a heat controlled warehouse and isn't used anymore. Its my grandfathers and I'm just fixing some odds and ends as well as changing fluids getting her ready to fire up again. Its been about 15yrs since it has fired. Reason I was wondering about batteries I have 12v at hand for our fleet rather then going out and buying four new 6volts. But I totoally agree if this was a regularly started truck I would ditch the series parallel switch. I just wanted to make certain the two 12v batteries would crank her over instead of the 4 6v in series.hey man welcome aboard,,,and good luck with it,,,looks pretty good...bob Quote Link to comment Share on other sites More sharing options...
Superdog Posted October 23, 2012 Share Posted October 23, 2012 looks like a really nice old C,good luck getting it fired up Quote Link to comment Share on other sites More sharing options...
umodelnut Posted October 23, 2012 Share Posted October 23, 2012 Very nice C model. Quote Link to comment Share on other sites More sharing options...
C609T Posted October 23, 2012 Share Posted October 23, 2012 Cool truck looks like its in nice shape Quote Link to comment Share on other sites More sharing options...
tkobes43 Posted October 23, 2012 Share Posted October 23, 2012 Sweet truck! Ive always wanted one!Tom Quote "Nothing Breaks Wind Like A Bulldog" Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.