Freightrain Posted August 20, 2010 Share Posted August 20, 2010 Hey Larry, I need a breast plate and brackets also for one of my B models.Thanks,RobI'll go look at see what I got laying in the garage. I know there is one complete one, maybe two? Don't know the origin, just got them with the truck. I don't have a stock bumper on mine, so have no use for them. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-61964 Share on other sites More sharing options...
Jocko Posted August 22, 2010 Author Share Posted August 22, 2010 i got it back to jersey and i took some picsmack2.bmpmack 1.bmpmack3.bmpmack4.bmp Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62064 Share on other sites More sharing options...
Jocko Posted August 22, 2010 Author Share Posted August 22, 2010 also about the grill guard im not in a rush to get that but i will contact you when i need one thank you Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62066 Share on other sites More sharing options...
Jocko Posted August 25, 2010 Author Share Posted August 25, 2010 does anybody know how i can tell if my truck is a positive or negative ground Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62305 Share on other sites More sharing options...
Rob Posted August 25, 2010 Share Posted August 25, 2010 does anybody know how i can tell if my truck is a positive or negative groundOriginally positive ground. If it still has a generator, prolly still is. Look at the positive battery terminal and where it runs to. If going to the frame it is positive ground. If there are no batteries in the truck, the positive battery post terminal is physically larger, (hole size) than the negative. 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/15227-1959-mack-b-61/page/2/#findComment-62309 Share on other sites More sharing options...
Jocko Posted August 28, 2010 Author Share Posted August 28, 2010 ok rob i have 4 battery cables 3 of them go to the parralel switch (2 on top 1 on the bottom)and the 1 cable left goes to the starter(24volt),also we got the truck running and she ran good we push stareted it Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62515 Share on other sites More sharing options...
Rob Posted August 28, 2010 Share Posted August 28, 2010 ok rob i have 4 battery cables 3 of them go to the parralel switch (2 on top 1 on the bottom)and the 1 cable left goes to the starter(24volt),also we got the truck running and she ran good we push stareted itI have a diagram at the shop that is easy to follow. I will scan and post it over the weekend.Does the truck have a generator, or alternator? The voltage regulator will have one of the mounting tabs for the wiring marked for pos, or neg. This will be indicative of ground polarity also. The series/parallel switch will work with either polarity depending on how it is wired.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/15227-1959-mack-b-61/page/2/#findComment-62518 Share on other sites More sharing options...
Jocko Posted August 28, 2010 Author Share Posted August 28, 2010 yea it has an alternator and on the tag where it says ground it is blank and im not sure where the voltage regulator is,if you could tell me that would be great,also i would really appreiciate it if you could post that diagram Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62521 Share on other sites More sharing options...
Rob Posted August 28, 2010 Share Posted August 28, 2010 yea it has an alternator and on the tag where it says ground it is blank and im not sure where the voltage regulator is,if you could tell me that would be great,also i would really appreiciate it if you could post that diagramSounds like someone has installed an internally regulated alternator on the engine. This would eliminate the need for the firewall mounted voltage regulator. The truck is likely switched over to negative ground as I've seen several reman alternators that are not polarity marked when negative ground, but marked with either a "P", or "positive", if positive ground. 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/15227-1959-mack-b-61/page/2/#findComment-62522 Share on other sites More sharing options...
Jocko Posted August 28, 2010 Author Share Posted August 28, 2010 how can i be sure what ground it has Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62523 Share on other sites More sharing options...
HK Trucking Posted August 28, 2010 Share Posted August 28, 2010 how can i be sure what ground it hasUsing a "test light", clamp the test light cround clamp to the truck frame (clean the paint & rust off where the clamp is placed to insure a good connection).Touch the test light probe to the positive bat. cable connection, if the light comes on, then your system is negative ground. If the light comes on when you touch the test light probe to the neg. bat. cable connection, then your system is positive ground.No batteries in it? Then as Rob said, you can tell which cable was positive because the terminal hole is larger, and the negative cable has a smaller terminal hole. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62527 Share on other sites More sharing options...
Jocko Posted August 28, 2010 Author Share Posted August 28, 2010 thank you(rob,HKtrucking),i forgot about test lights ,thanks for the help Quote Link to comment https://www.bigmacktrucks.com/topic/15227-1959-mack-b-61/page/2/#findComment-62540 Share on other sites More sharing options...
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