A Search for New Front Brake Drums

[mattb73lt 897]

40 minutes ago, Vladislav said:

Hmm... I will try to check it out tomorrow. The issue is the drums were rusty I suppose they're original to 1988 truck and the hubs were not separated.

No problem, I was just curious.

[Vladislav 2,992]

On 2/15/2021 at 1:51 AM, mattb73lt said:

No problem, I was just curious.

Got lucky today getting to the drums. Also could scratch away some rust with a wire brush and find Mack part#. It's 17QJ480. Also there was a script of something like 27V 176 but difficult to judge for sure and MAX DIA 15120. I will upload a few photos I made a bit later.

 

[Vladislav 2,992]

Forgot to mention I measured the width of the track the shoes traced on the inside and it was nearly 120 mm.

[mattb73lt 897]

That’s still a good part number. The specs are off for my application. They’re for 15”X4” brakes and the pilot hole is a lot smaller, although they looked very similar in the pics you posted. I was hoping that maybe that might be a good drum. I’ll see what the ones I found look like when they arrive.

[Vladislav 2,992]

Here are some pics of 17QJ480 as promised.

Just needed time to upload them from phone to mail box and than download to 'puter, resize and put on here.

Measuring the shoe trace it seemed to me as 120mm of the flat spot but the trace itself was nearly 100mm (4") indeed. I just didn't focuse on the actual trace expecting anything installed on the truck during long service in Russia. No matter, in fact it seemed like 5" wide shoes could work with those drums or 20mm (3/4") cut could be done over the edge.