SuperB

I fabricated the bracket I needed. This will work and position the brake handle where it was originally, and I'll just keep an eye out for an original bracket. Thanks for the help guys

Thanks for the picture Steve. What model truck was that brake in? The shifter handle looks like it's a little longer than the one from my truck.

I agree with what you said there Larry. I kind of think Mack just finally decided at some point to use the same case covers for all transmissions, duplex, triplex and quad, since it would work for all 3. They probably just revised the brake mounting bracket for when the cover was used on a duplex. I'm pretty sure those two bolt bosses on the side of the compound shifter housing in your picture is how the handbrake is mounted on the triplex and quad. The rear bolt boss even sticks out further to create the correct mechanism angle that my original one has when it's bolted on. I feel confident now that I can go ahead and install the transmission knowing this case cover is the right one and won't have to come back off. Hopefully I'll be able to find the right brake mount for this transmission, and just make my old one work for now. Thanks guys

Thanks for the replies. The greasy thing is the early TRD-72 duplex that I have the handbrake from. It attaches with the 4 backed-out bolts. The 3rd picture is the TRDL-722 duplex. It's the exact transmission the truck originally came with, but I don't understand the difference in the case covers. This cover looks like a TRT triplex cover without the small compound shifter box installed. I think the handbrake on a triplex would attach to the side of that shifter box, but i'm not 100% positive

According to the build sheet for my '65 truck, it came with a handbrake arrangement. Also, the transmission I'm putting in had the brake drum assembly on it when I bought it. That's all I have to go on though, unfortunately. I don't have any parts diagrams for my particular truck/transmission.

Hello everyone. I'm trying to figure if there was more than one style top cover used on the duplex 10-speed transmissions, and I was hoping someone could help. I just removed the older model duplex from my truck. I think it's a late 50's and it's a TRD-72. I have the correct year and type transmission for my truck all ready to be put in, and ran into a problem. This transmission is a 1965 TRDL-722 aluminum 10-speed. The issue is that the hand brake mounting is different between the two. In trying to figure it out, it looks like my 1965 transmission actually has the triplex style top cover even though the transmission's part number is right for my '65 B61. Its has the provisions for attaching the small triplex shifter box/housing on the driver's side. I guess that doesn't necessarily mean this cover is wrong for my truck, but it would require a different hand brake mounting bracket than what the TRD hand brake has. Any help in figuring this out would be really appreciated, I don't have any info on this in any of my books or manuals, and I can't find any pics online either. Thanks in advance

I'm looking for a hand brake mechanism and mounting bracket for a 1965 B model Duplex transmission. It might have to be from an aluminum case transmission though (TRDL-722). I have a brake mech from an earlier cast iron case transmission (TRD-72), and it has a different mounting arrangement, so it does not fit on the aluminum transmission for my truck. The one I need looks like it mounts using 2 studs that are right next to the main shifter attaching bolts, and also uses 2 horizontal bolts that go into the side of the transmission cover down near the gasket surface. I'm guessing at this, because I can't find a diagram for my transmission. I can try to post a picture if my description isn't clear. Please message me if you might be able to help. Thanks

I'm rebuilding the normally aspirated 711 engine in my B61, and have found some concerning stuff. The rim around the bowl on all 6 pistons have small cracks in them, and the tops of several pistons are glazed. It looks to me that they've gotten really hot at some point. The engine is original and it's just a hobby truck now. The engine ran fairly well, but had some issues I wanted to fix. It has had one head, one connecting rod, and 2 pistons replaced at some point in the past, and the engine looks like it's been together for a long time since the last rebuild. I checked the pump initial timing before disassembly, and it was 29 deg (I think 28 is the original spec). I checked the timing and duration (full throttle) for each cylinder in the pump, and they all looked very good to me. This engine has the syncrovance. Oil pressure was always very good, and crank end play is good, so I'm not taking the crank out. I will be putting in new pistons, rings, rod bearings, and heads. Liners are good. I have not had the injectors tested yet, but I will be getting that done also. Does anyone have any thoughts on the issues with the pistons that were in it? I've heard that these engines had high cylinder temperatures when they were new that caused head and valve problems, but I don't know if those issues would be anything I would have to worry about just playing around taking it to shows. Oh, and it has the original oil bath air cleaner on it. I plan on putting a pyrometer on it just to keep an eye on things. Maybe what I've found is no big deal and was common for these things back in the day from hard use (this truck was used to pull a water tanker I believe), but if the timing needs to be changed or something, I'd appreciate any guidance or advice you guys can give me. Thanks in advance for any help!

I was able to find what I needed. Thanks

I'm in need of a rear main seal retainer for an E6 engine, the style with the rubber lip seal. Thanks in advance for any help.

Hello, I'm looking for the panel that bolts on the front of the flywheel cover (bell housing) on a B model with a 711 or 673 engine. It's about 12" long and covers the large bell housing opening near the rear of the engine oil pan. It attaches with two 3/8" bolts. Thanks in advance for any help.

Thanks guys. I'm still not quite sure what applies to my 711 though. Here's a table for 673's in my Operation and Maintenance manual.... Here's a table in the back of that same manual for 673P's specifically. It seems like there are different numbers for each pump on each engine. It's unbelievable how difficult it is to find anything specific to the mid 60's END711. My pump number has a P8 suffix, but I can't even find a 673 spec for a "P8" pump. Maybe the Mack Museum like was suggested earlier? It looks like they stopped giving this info in the Mack repair manuals, like Steve said above.

Thanks JoJo, the engine and pump info is in my first post, except that it's in a B61. Also, it's an ENDL engine, if that helps. Hopefully it'll be in your books. None of the TS442 repair manuals I have list it, but I don't have the earliest edition.

Thanks for the replies. We must have the same O&M manual, because those 673P specs are the closest ones I can find too. I didn't think that the museum might be able to help, maybe I'll reach out to them.

Would anyone happen to have the rack setting specs for the injection pump on my truck? None of the manuals I have list mine. 1965 711 engine American Bosch APE6BB-90Q-5069B8 Mack 313GC4135AP8 Thanks for any help