Lancer Boss forklift help needed

Hi,

I know this is not a tractor, but I can't seem to find any active forums for forklifts. Please direct me to one if this discussion is not welcome here...

So, we recently acquired an old Lancer Boss MD6 (think that is the model number) forklift with a 4.203 Perkins engine and the Borg Warner T12 transmission. It was standing for a decade or so but we managed to rebuild the CAV DPA pump and get the engine running. Also worked on the transmission valve body and it seems to have forward + reverse now. One wheel is still off so haven't driven it yet. Busy with the brakes:

Hydraulic brake part seems very basic and rebuilt one slave and the master. The handbrake is a bit of a mystery.

There seems to be no transmission/differential hand brake nor is there enough components inside the brake drum to make it work. The wheel hub back plate(as well as the cast iron bit in front of it) only has a slot above the slave cylinder, about 1/2" high and about 1 1/2" long, the cast iron is quite thick there so it is about 1" deep, the hole looks a bit taper with rounded corners, draft angle for casting maybe?. It also has the small slot for manual adjustment at the bottom of the back plate.

The left shoe has a small boss/pin with a nut and the right shoe has a square (about 1/2") pin almost in the same location (mirrored) as the left shoe. All of this is on the right wheel. These things are located slightly below the big slot center line.

There are no other holes in the plate like on a car where the hand brake cable can enter. The handbrake cable dangling loose has a threaded boss on the outer cable, about 3/4" diameter, with a threaded rod, about 3/8" dia and about 2" long on the inner cable.

We have searched high and low and can not seem to find where the cable was attached to. The transmission has an inching valve that was jury rigged with some springs and washers and a homemade bracket. From pictures on the net, it seems the inching valve linkage bracket was bolted on top of the valve body(this was on some other forklift). Currently there is no OEM bracket on there and I'm inclined to think the handbrake cable might have attached to this plate also, but where did it go to from there??? There are no visible signs of holes/mountings of any kind on the chassis/frame/floor where a bracket or linkage system could have been mounted. so the valve body bolts is the only plausible explanation.

Any pictures, advice or manuals will be greatly appreciated!!!!

Welcome crystallattice !

Can't help with specifics on that brand forklift, sorry.

But I suspect the park brake, since there is no provision for it to go to the wheel brake assemblies, was somehow attached to the transmission. Probably a drum and shoe somewhere inside the bell housing. Those things are so compacted into the frame it is impossible to see where everything goes!

Is there a dealer or repair shop near by? Sometimes you can luck into the right person that will be willing to share their experience, or let you look at one that is intact.

Thanks for the warm welcome Steve, I actually thought I was registered already, since I've been reading stuff on here so long, but turns out I wasn't!

We took the other wheel off and same setup on the shoes. This back plate had a rubber boot over the big slot at the top. Makes me think a cable/rod could have gone through it.

Already chatted to a local forklift guy and he said there were only about 3 of these forklifts in town. Remember it is a '70s era forklift. He said it will either be a splined shaft coming out with a lever arm attached, a cable or a rod from the one wheel to the other with a lever arm attached to it. Problem is the diff is in the way, and there is not enough support in the back plate for a rod, a round hole with a bush/sleeve would make sense, but we have an un-machined slot.

The diff is very small so it would have needed to be an external drum, except that there is not enough space between the yoke and the housing. The other side of the universal is also not very spacious. Also, the universal needs to be assembled in place, which can not be done if a drum is obscuring it. Also no mounting holes in proximity for the other needed brake hardware.

It would seem if we can get a contraption that can expand the shoes, like the cylinder would have done, but working with a cable it should work. Problem is the only clues is the small (about 1/4") stud/boss on the one shoe and the square pin on the other. Left/Right wheel shoes are the same so this contraption must work in either direction, if that makes sense...

The link may help.
Lancer boss

From what you describe it sounds like you are missing many hard to find parts.

Would installing a line lock work for what you need?
They used to be available in electric or manual.
Install in the line from the master cylinder, engage and press on brake pedal and it will hold hydraulic pressure in the system until you press om the brake pedal again to release it.