doubleclutchinweasel

I have heard of 15W-40 giving different oil pressure than SAE30. I know folks who swear by both!

Didn't all the 24V starting system trucks use the manual push button to activate the series starting circuit? Seems like all the ones I saw did. Turn on the key then push the button. All the 12V starting systems I ever saw just started with the key. Maybe that's a way to tell if it has a 12V or 24V starting system. If it IS a 24V start, then that unit would definitely be a good place to start.

Bad batteries on one side? Bad crossover cables?

That cab is nothing less than gorgeous.

Need updates! What's going on now?

Matt, I'm due for some more updates. I need a "fix"!

If it's like the 13, you can. But, it may not be exactly the same ratio. Might have to go in a little sooner or a little later. Understand about the not wanting to risk it thing, though!

Saw it at lunchtime today...

Yeah, that sounds like something i would have said before!

To be honest, I rarely used all the splits in a Quad...even when loaded. Used no more than 6 w/empty trailer. Could get by with 7-8 with most loads. Even when heavy and needing to split the main, it was common to skip a gear in the compound. By the time you got into that hole, it was time to go to the next one anyway. So, just skip part of a split and keep going. I only recall a time or two that I actually used all 13-14 progressive shifts in that thing. Bobtailing in my R600 w/15-speed, I normally only used 4 or 5 gears. We had one driver who did just what you said, though. He really wanted everybody to know how good he was with 2 sticks. It really WAS impressive...until he missed a shift and had to stop and start over! Then it was REALLY impressive! LOL!

I love it when there are multiple answers, and they are all potentially right! LOL! Like the man said, the INTENTION is that that lo-lo switch is ONLY used in lo gear (or reverse) and lo range. Then, it is SUPPOSED to be disengaged...and you are back in lo gear, lo range. Basically, it is an 8-speed, plus a lo, plus a lo-lo...kinda like it says on the shift plate onyx posted. Imagine that! BUT, like jojo said, there are other possibilities. If you know what the effective "steps" are, you can use them. It's similar to the old 15-speed RoadRanger I had. You were SUPPOSED to use the deep reduction to go from 1st through 5th, then disengage the deep reduction and go back to 4th, at which point you would resume your regular "10 speed" pattern. It gave 12 forward speeds. BUT, you COULD disengage the deep reduction in an earlier gear and downshift 1 step in the main box. Worked out about the same. Their intention was to gather as much road speed as possible before making that air shift. I have done something similar in a 13-speed RoadRanger, using the "nothing" and "double nothing" gears in hi range while downshifting...to keep from going back into lo range. But, using "lo" gear in hi range resulted in uneven steps between gears. IIRC, I had to lug hi 1st (5th gear) down a little lower before going into lo gear on the main. And, if I still had to go back to lo range, I had to short shift that one (not drag it down as far). Used some of the "unused" combos on the Mack Quadruplex, as well. Like Direct and Lo-Split 5th. They are there, they are just essentially duplicates of other gears. Like I said, you got a lot of different answers, and they are all potentially right! Love it!

I was just watching the 1977 movie “Citizen’s Band”. In addition to a pretty cool cast, I just noticed that one of the guys had a really cool handle. Roberts Blossom played Paul Lemat’s dad, under the handle of “Papa Thermodyne”. Gotta love that handle!

You're in the right place! Lots of B-model owners on here. Lots of good technical people to lean on, too. Welcome to The Dog House.

Maybe an oil cooler? Looks like there have been some numbers superseded. Maybe if you can give these guys on here more info on what you want exactly, and the model number off the engine, someone would be able to come up with one. There are great resources on here. I saw that number listed in the verbiage on this ad, but don't know anything about what they have or don't have. Good luck! https://www.heavytruckparts.net/detailview.php?partnum=132446&vendor=7641244&store=1&ajax_dv=true&resultid=6&img_wide=

Maybe you got a point there, Mech! The older color reminded me of "school bus interior green", although it was not exactly that. Just kinda felt similar. It does not help that the first truck I drove with the darker green interior was a black truck. That whole thing just felt DARK. Dark outside, dark inside. And, it was an R700, so its nose was so long that you couldn't even see the shine off the bulldog on the front. 'Course, that dog was gold...so it was darker too. V-8 Maxidyne, 6-speed "Extended Range" Maxitorque. That thing would yank your head off your shoulders. It was quite a transition from 18-speed Quadruplexes, though. Wait...wait...wait...not yet...NOW downshift.

Yeah, the '67 I drove when the world was young, and so was I, had the lighter green. My '70 and one of the others I drove back then had the darker shade. Seemed like the lighter one was a little more glossy and slicker, and wore better. The darker one seemed to be a little more matte, and rubbed off a little faster. But, that could just be failing memory! I am having that problem more and more here lately! Regardless, I loved the layout of that old steel dash and the relative simplicity of it. Plus, no plastic panels. The needles on the tach and speedo were cool-looking, too.

Like Bob said, most of those just had the steel door panels. I still love those all-steel cabs. Green interiors forever!

I had a mud dauber problem on mine. Fuel was returning to the RH tank but the LH tank was almost dry. Pulled the vent off the top of the LH tank, and it was stopped up by the little critters. Cleaned the vent tube, and voila! Air could escape the tank and the fuel could get in. Hateful little bastards...

That B73 front end sure looks impressive. I mean, the B61 is super clean, but the B73 just looks like a hoss...which it is! Can't wait to see this thing together.

Love it...

The only thing that sucks about that truck is that it's not in my driveway! Can't wait to see the next round of updates.

There are no words to describe that interior. It is absolutely gorgeous.

VIN number on the frame will look something like this. Again, behind RF tire, ahead of the cab. VIN number plate in the door may or may not match!

A closer look...

Look carefully, and you can see the stamping on my old '70.