Vladislav

My personal experience figuring air brake issues was of that way I mentioned above. Read basic system, looked over what I had on a truck, found a valve I couldn't figure a matter of, googled "Bendix air brake valve" and idi'ed my one looking Google pictures. Passed that route for two trucks. Met unclear cases 2 or 3 times and got answers or advices on here. But had to explain what I was against of and my basic knowledges allowed me to do that clear enough. Good luck on troubleshooting!

The rears are Mack rears and they look original to a L-model excepting the carriers. To a heavy L-model I would say, LJ or LM. I can't tell the capacity, no less than 44000 or heavier. Original differentials had less bolt holes (10 if the memory serves good) and there were two studs which went through the banjo from underside and attached the diff housing. The studs take their place but I never had idea CRD92/93 may fit into those old banjo's. I used top gear sets off 92/93 and installed them into old carriers keeping original bull gear sets when "accelerated" my stuff (my original diffs were stamped CRD32/33). The power divider is in its place on the photo's. Has long housing as they all were up to a certain year (60-something?). You can see them in B-models normally. The principal is almost similar to the later style in a short housing, even the inner cam and peanuts are interchengeable (if I'm not wrong). Those long dividers were both used in carriers with 10 mounting holes and later ones with 18 (or how many?) holes as CRD92/93 are. I'm not sure if a CRD92 wouldn't be called different with long divider though but besides of that it's identical. But the top (bewel) gear set is special for the long divider carriers, the later style pinion can not be used since it's not long enough for that. The front axle is also well looks like a heavy L-model axle. As for the chassis number it may be found at the left (driver's side) frame rail above the front axle beam near the top of the rail. Some L's had it there. Some had at the rear of the chassis I heard many times but never saw in person. And not sure that works for tandems, I heard of single axle trucks. Vlad

It's not an easy deal and definitely time consuming to explain all principal of air brake system on here. The matter is there are plenty of articles on the net describing it down to a last nut. Some trucks may have some components and some don't. But basically they're all the same. Sure you may find trouble figuring out a certain special situation, how it was in the beginning of this thread since that rotochamber acrtivating hydraulic front brakes are not a common design. But in the case you put your question at the moment it seems you need to pass a basic stydy (which normaly takes an evening or two of reading). Than look over the brake stuff you have on your truck figuring what is what and than start disconnecting or capping different lines figuring if the air goes to where it should to and doesn't to where it shouldn't. Sure the site crew is always of help. But you may have answers for particular questions. Not much possible to investigate and fix a whole brake system of a truck which is unseen and you are in a few hundreds of thousands miles away.

Great! And thanks for sharing those old days' pictures.

Looks like a cool toy to play with and she's already yellow! Happy upcoming New Year!

Upps, Lanova indeed. I thought of END673 at first. And a tandem A-model. Cool rusty thing!

Merry X-mass to everyone on here!

Merry Christmass BMT!

If I'm not wrong Magnadynes were flat head engines, before Thermodynes.

When Mack introduced new family of OHV engines it called it Thermodyne. For both gas and diesels. In November of 1938 Nice looking animal BTW, thanks for sharing!

Two thumbs up! Merry Christmass!

Me too. But it's a printed copy. If you're looking for any tolerances or schemes/photos from it PM me.

This is FP of Gary Mahan's collection as it looked in 2013 when I took these pics. Very interesting vehicle on my taste combining classic look of 40's-40's with early 20th century's mechanics. The photo's are heavy since I can't downsize any at the moment so I may be needing to delete them in the future.

That looks like Lanova engine by the location of the injectors and Buda's were Lanova's in those days. Doesn't look like Mack Lanova it's worth to point out. Great find, very rare as it seems to me.

Wow! Greal truck and great project! And welcome to the group! Also very nice to learn such a vehicle showed up in Poland. I keep my eye for different Mack trucks over Europe for more than a decade and doubtly remember any L-model firetrucks besides your example. And L-models are rare in Europe at all. As you see both of your initial questions were answered immediately. This is an example of kindness of folks of here no doubt but also result of your approach putting questions in a correct manner and what was more important (as it seems to me) first representing your project and your needs with pictures and the story. People enjoy spending time on here communicating with persons of the same interests. And this goes better when info exchanges, not a one gate game. Speaking a bit more about the rev governer I can say I have one Mack truck with similar 707 engine and similar (or nearly similar) governor. First when I found it taking place there I was surprized seeing such part on a gasoline engine. Since I used to see them on diesels. Probably the matter is huge size of a truck's engine and risk of collapsing it due to high revs which is not a common problem with cars. A governor in my diesel Mack provides two functions - limits maximum revs and keeps idle. But this gasolin unit only limits overevving if I'm not wrong. Better to refresh this point checking out a manual. P.S. I very like your country and people. Used to drive there alot during many years, visited the most of big cities such as Warsaw, Krakow, Poznan, Gdansk etc. Unfortunately it's difficult or impossible for me to do that in the recent times, you know. Ok, let's hope for better times and better discuss Mack trucks. Vlad

Thank you! Almost as you said.

All I can say is I add my opinion to what said above. And I too like Mack trucks of 40's years (and own two). My preference is originality of a rig but your toy means your rules. Vlad

So is this the time to say Congrats??!!

Sounds like the valves are in the steering box with power cylinder put separately. You can only remove the lines from everywhere including steering pump and get a mechanical steering. What is I guess way far from what you want. The joint can be repaired in a machine shop. But that would be a headach and the truck must be parked for that time.

I don't know is that an assist cylinder or the only power cylinder. Which I would also call a power assist cylinder. Just depending on what it assists to - to the main cylinder or to a steering system.

Easterns usually had integrated steering boxes. That Western setup we talk about was born as an upgrate of mechanical steering. Mechanical gear in its place at the left rail with drag link attached to a Pitman arm. But the link has a valve assembly incorporated in it so when you apply force to it by steering wheel one or another valve opens (depending on the direction) and supplys pressure to a power cylinder which is fitted in parallel to the drag link. It may be fitted at the other side of the chassis (at the right) or right near the drag link. As soon as the cylinder has made his job moving the wheels the valve closes. If you continue forceing it by your hands cylinder continues turning the wheels further more. Actually this setup can be hydraulic or air and power cylinder can be attached to a tie rod too since there's no matter which point of the steering system you move. And may be arranged as an add on kit.

Weeping Willows? A kind of this? They grow here, not very common. I don't know why. Usually you see them near a river or a pond. Those in the picture were catched in Belorussia. It's 1000km to the West from my place and a little souther. But in general the same environment.

I've got mostly maples in my yard, planted them myself many years ago. Also a couple of oaks. Had a few birch trees too but mostly swapped them with firs which are seamless in the case of fallen leaves. The maples accompanied by oaks make a big job every authumn and I have to fill up 5 or 6 big sacks of old stuff and relocate it to a ditch along a side of my second property. This year turned out very short on time and I missed the moment. Yesterday's storm brang a few santimeters of snow onto the ground which cancelled the deal so far. The forecast promises warming back up in the next week so I foresee some gim with dirty wet stuff soon. It was fun a couple decades ago to put a hill of old leaves on fire. Fun for me and not for neighbours who built big houses close to my place so no such games anymore (but who knows?)

My guess the truck has valve assembly in the drag link and the power cylinder at the right. Doesn't it?

Does she cry of of how poor the shape of the poor old truck is and how soon are you going to bring it back to life?