rear brake cam question

Greetings,

As I continue to work on my friends 750, more anomalies appear. Thank
you to those that responded to my questions about Combat
gearbox removal. Successful removal and re installation after the rebuild!
The current problem involves the actuating arm on the rear brake plate.
A previous owner has swapped out the rear wheel and brake drum to the
earlier style. No cush drive, just three studs through the wheel hub.
Despite having plenty of material on the brake shoes, I can not
adequately adjust the rear brake with out excessive travel of the foot
brake lever. I have adjusted the cable to the limit and I still have a
good three inches of brake lever travel. On my 850, I can lock the rear
wheel (on center stand) with about an inch and a half of brake lever
travel. I'm not sure if it is an accurate comparison (1973 850 vs 1972
750) but I have disconnected both rear brake cables and am now viewing
the actuating levers at rest. The 850's lever is further back from the
rear axle than the 750. On the 750 the lever is at rest at about the
5:00 position. The 850's lever is at about the 4:00 position. The lever
mount itself has an oblong hole and can only go on one way. My question
is about the cam it connects to. Are the lobes equal or does it have a
correct or incorrect way to install it? Kinda stumped here and curious
as to why someone would opt for the earlier set up.
Many thanks,
Glenn in NY

Do you have those little extra pads installed on the ends of the brake shoes? Just a crap shoot.

I will have to open it up and take a look later today DogT. I do not see any reference to them in the parts list . Thank you.

You can make your own "slippers" for the shoes, like I do, I posted on this website how to do this.

Sport75073 said:

I do not see any reference to them in the parts list

Click to expand...

You might not find them in a pre-73 parts book, as prior to that, the slippers were supplied with the shoes. From '73 they were separate parts.

https://andover-norton.co.uk/en/shop-drawing/75/rear-wheel-drum-bearings
'17A'
https://andover-norton.co.uk/en/shop-details/15183/brake-shoe-slipper

One of the shoes had a slipper the other one did not. Also, the torque pin wasn't horizontally mounted. I'm getting it sorted slowly. New shoes and assorted sundries on order. Thank you for the tips and advice.