Cat C15 Jake Brake Question

Well, it’s a S60, but I’ve had issues lately too.

I should’ve left them alone, but the mechanic was in the head anyway, so I had him rebuild the PAC brakes. He wound up machining off a few parts, for some reason - messed them up, they were really weak.

So he swapped them all out with Jacobs. Which are as weak as his rebuild job on the Pac.

Now he wants to try adjusting them down further, as a last resort.

Last heard he was searching for plungers and parts for the PAC brakes to try and get them right, parts were difficult to find.

He hasn’t charged me anything - and it puzzles me because he and his Dad have extensive mechanical knowledge, he cuts counter bores round town as well. But he can’t get these darn jakes right.

Part of the problem is - the truck was in the shop for a month, and after all the back and forth, I think I’ve forgotten how good/bad they operated before - but we all agree they’re weak now.

Sorry for the ramble, but that’s all I got.

Oh - his Dad said they used to be a dealer installed option - at one point, even wiring and switches. That was his explanation to my question of why they weren’t Jacobs brand initially. It’s a Pete 379, 1995.

 

If you come across a set of 340c jakes, use them. They work better than the pac brakes. Even a set of 340A's will work also.