Alright, this isn't critical per say, but it is something that's been bothering me.
TWO different things to discuss in this topic:
A: When I picked up my '76 620, I noticed the parking brake was a little soft. Obviously, the first thing I did was adjusted the parking brake cable. I tightened up the tension on it to where it would begin to engage as soon as you start to pull the handle.
Now the handles softened and I have about 3 inches of free play in the parking brake handle. The parking brake won't hold the truck on a small incline without me first pushing the pedal down hard with the parking brake set, and even at that sometimes it doesn't work.
What I've done so far to troubleshoot:
1. I've done a basic brake inspection. I was told the brakes were replaced recently before I got the truck. Since I know you guys are going to say "that doesn't mean anything," I went ahead and pulled the drums before making this thread, and can vouch for that. The shoes are new (looking) with 100% material. Hardware looks brand new on top of that. Also with that, the left rear wheel cylinder IS leaking a bit, and is on my to-do list.
2. I've re-adjusted the brakes on both sides, and were not off adjustment more then a notch.
3. I've adjusted the parking brake cable, but there literally isn't ANY more room for adjustment, so obviously something's not right.
B: When I step on the brakes after releasing the parking brake (I think this is just coincidental) there is a somewhat loud 'pop' from what sounds like the front right wheel. During the brake inspection noted above, I found the brakes @ that wheel were mis-adjusted and tightened up a few notches. I have more braking strength, however the noise did not go away. When I had the drums off, I saw nothing out of the ordinary on this wheel. All hardware/springs were in the right place and none looked fatigued. I also noticed after getting a 'pop' out of the brakes, I have less braking strength, although I know this is partially due to the rear cylinder listed above.