T-Mack1

Messaged you a picture of the square finned thing.

When I looked over the generic wiring diagram, I noticed that Mack uses 2 pole gauges. YAY!!!!.... easy to convert. So far, it looks like the biggest hurdle will be the Leece Neville alternator (Orig equip per Mack museum info) and the square finned block thing that I think is a regulator. Need wiring pin-outs for both. As for the heater, No heater in the cab and not sure it had one as it's an open cab truck.

Hi Joe. I tried this GM HEI conversion on my ONAN house generator. I was tired of the condensers only lasting two years due to the heat from being mounted on top of the engine. In the process of doing it, I found out there are several types of HEI modules, and took buying 3 to get the right one. It worked for a while but failed. The little solid wire leads on the resistor did not like the vibration. So, just changed type of condenser from the standard electrolytic to an "Orange Drop" type of same value, which will out last me and maybe even my grandson. note: the reason the points go bad is because the condenser starts to go bad and the points start to arch. Another note, there is no reason that the condenser needs to be inside the distributor, It can be remotely mounted away from the heat, within reason. (2-3 feet).

After getting the truck running, the plan is go Electronic Ignition. Brillman sells the kits. Both Positive ground and Negative ground. I did talk to Doug at the Mack Museum yesterday and starter will work correctly, both POS ground or Neg ground. Also after I got our Federal S6B siren running and found it also didn't care about polarity, asked my friend that use to build race engines and is a electronic guru ( like breaking his Harley CAN bus data stream and making a little display to show the data), the reason is both are NOT permanent magnetic DC motors. So plan is to go negative ground so we can get new accessories.

First, thanks to the Edelbrock family/team for making an air cleaner that is sort of decent looking on an antique Mack (note the first picture in the thread, we did not get an air cleaner with the truck). I removed the Edelbrock tag and made a plate to mount a front hub emblem on. Had to make a slip sleeve to take up the difference of the air cleaner and the 4 inch cast aluminum intake piece. Hose clamp tightens the slip sleeve on the intake. Next, some may notice, some might not. Jack and I have a diesel exhaust manifold on our Gasoline engine. It came that way.

Barry, Is there going to be a update anytime soon? Tom M.

Getting it out of the left side of the B-model was interesting. Would have made a good viral video, LOL!

Trying to load after picture but having issues. Apparently I've hit my limits. Darn.

Carb before.

Ok, we took carb off to check intake for critters, and only found some dropping under the carb. As if they visited the card and left and couldn't get past the throttle butterfly plates. And we freed up the throttle linkage and most likely the dropping fell straight down. Carb has been cleaned and painted. I also figured out how the RPM limiter works and took pictures. I will post something.

Thanks!! I may go do some work on it tomorrow as the weather here on East side of Pa may get to 50 degrees.

I uploaded a fuse list in another topic (PDF fie). The folded up list under the pie-plate (triangle cover thingy) use to be almost a random listing. So my buddy and I sorted them so we could quickly correct issues on the "Cab" line when I was a line Flex-Repair person. But...... I know 2011 thru 2016 fuses were the same. Not sure about 2009.

2011 to 2011 emission should be same. Not sure about 2010 to 2011. I vaguely remember that 2012 was the year of an emission change. But, for the MP8into your truck you will need the ECU reprogrammed. If you use the ECU that came with the MP8, then you will need the rest of the truck reprogrammed as the VIN/chassis is in the different computers that run the truck.

Low pressure warning should come on at 60 psig, The valve should pop between 45 and 30 psig. The way you have a tiny bit of tine to get off the road before the brakes lock up.

No Bulldog on hood (replaced by handle) is sign of NYC -Dept of Sanitation (DOS). Not sure about the departments. The bulldog gets stolen. They still do that (without Bulldog variant). The red truck (RD?) has a handle.

Not sure if this post should go here or under engine. But, the Engine section looks like its a lot of more modern engine questions and I don't think it would get the best response there. The question I have is, what's inside the tube that comes out of the rpm limiter (cable, chain, or some kind of tube)? As you can see from the picture, we received the truck with no air cleaner. So, before we do the compression test, I would like to take the Zenith carb off and make sure there's no critter nest inside. But the tube from the limiter goes into the base of the carb, and makes getting to the bolts hard unless I disconnect it.

The numbers on the engine, that I took picture of, were on R/S lower block. Sort of down between Air brake compressor and distributors. (fire truck, gas engine, and hook & ladder so Air brakes. Distributors (2) are where the diesel fuel pump would be)

Hi Robb, Sorry I don't know the year of their B-Model that is in storage. Since I am a Mack truck employee (until Friday 1/10/25), and also a Mack, Doug the curator allowed me to climb over the truck to get some reference pictures to get our '57 B85F open cab going. There was a lot of stuff that made it a tight climb, so they might not allow someone to go into the storage area for insurance reasons. (As an employee, in a company owned facility, I would be covered.) But, maybe if you contact them, asking for a certain picture............

Here are pictures I took of the B85 enclosed cab firetruck that is in storage at the Mack Historical Museum. Taken 12/23/2024. I was looking for reference pictures for how things are laid out for our restoration of an open cab '58 B85F hook & ladder tractor.

I got chance to go to the Mack Historical Museum on December 23rd. I had some stuff to drop off (framed pictures that once hung in the old World Headquarters). I also wanted to talk to them about my brother Jack & my B85F. And to take pictures of the enclosed cab B85 firetruck that they have in storage for references. It's in original condition, but needs going over. Plus, my Mack Trucks employee badge is getting turned in Jan 10th when I retire, so I wouldn't be able to "badge" thru the front gate soon. (note: since Mack Defense has a small assembly line in the facility, the gate is now manned by a security guard). After looking at their B85, the curator Doug Maney asked if I submitted a request for info. I told him yes, back in the end of November. He said that we should be coming up soon. Then he asked if I wanted to see the build sheet...... My response was "Of Course". Yes, I held the build sheet in my hands. Our truck (B85F-1211) was third of three trucks on the order (see picture). The order sheet has engine, trans and axle serial numbers. And, if it's anything like how we run now, it's a "as planned" number. It looks like we have the axle from 1210. Not sure the number on engine is a serial number or a build date number. The number of characters in the serial number doesn't match the stamping. I haven't tried to contort myself to find the trans SN yet.

Nice, hope we can get somewhere near that HP once we get our engine running. Here is what's stamped on our engine, lower right side of the block...