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Old 06-17-2015, 05:21 PM   #29
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DMTTRANSPORT

A PacBrake brand/make of "exhaust brake".
Exhaust brakes are installed in the exhaust system.
There are other brands/makers of exhaust brakes including Jacobs.

"Compression brakes", (aka: engine brakes), although they accomplish similar auxiliary braking, do the braking differently.
Compression Brakes, (which are internal to the engine), are often called Jake Brakes or Jacobs Brakes.

See: Exhaust Brake Vs. Jake Brake | eHow

Mel
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Pac Brake also makes a "Valve Train" Brake/Retarder (I have one on my C15) Jacob is one Mfg. Pac Brake is another (Paccar ie Peterbilt/Kenworth), I understand how the two work differently causing some what the same effect, The Valve Train Brake/Retarder works the same Jake or Pac Brake by holding the Exhaust Valve(s) open. Like turning the key off (simplified) Cat also makes a "Flywheel" Retarder (Brake Saver) I also have this on my Truck along with the Valve Train Retarder...(Plenty brake HP)
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Old 06-17-2015, 06:42 PM   #30
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I guess I am an odd ball here. I bought the PacBrake lube a bunch of years ago and never used it. This was after talking to our local CAT/Cummins shop and they said it burns away pretty quick. I have 100,000 miles on our Alpine and no issues.
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Old 06-17-2015, 06:44 PM   #31
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Lubing the exhaust brake can't be too critical. In the eight years we owned our 03 Phaeton, not once did I lubricate it. Didn't know it needed it. In the first 3-4 years, I did the annual servicing myself and after that had a local diesel shop do it. If they lubed it, they never mentioned it on the service order. I'll bet I'm not the only one to overlook this little item. Can't be too important as it worked every time I used it.
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Old 06-18-2015, 01:54 PM   #32
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Lubing the exhaust brake can't be too critical. In the eight years we owned our 03 Phaeton, not once did I lubricate it. Didn't know it needed it. In the first 3-4 years, I did the annual servicing myself and after that had a local diesel shop do it. If they lubed it, they never mentioned it on the service order. I'll bet I'm not the only one to overlook this little item. Can't be too important as it worked every time I used it.

I think it depends on how often your use your MH. It's when it is parked for long periods that not lubricating the PacBrake can come back and bite you in the butt! JMHO!
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Old 06-18-2015, 03:01 PM   #33
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I think it depends on how often your use your MH. It's when it is parked for long periods that not lubricating the PacBrake can come back and bite you in the butt! JMHO!
MSHappyCampers
That is my understanding.

IMO, a seldom used, (and/or never lubed, aka: NOT properly maintained), PacBrake is often problematic just if/when it is needed the most.
I use mine a lot, and I also periodically lube it, and I've had NO PacBrake problem in the 14 years, (114k miles)...I've owned my coach.
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Old 06-18-2015, 06:28 PM   #34
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Ok I'am in the dark on this one just what kind of lube does one use on a piece of metal that reaches 1200 degrees ? Seams like someone is selling a new kind of snake oil 😎🌴
It works!
I don't use the PacBrake high-temp oil though. Instead I use graphite lubricant, it is a liquid when applied, the carrier quickly dries, leaving a dry film of graphite. So far so good.
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Old 06-18-2015, 07:54 PM   #35
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Oh, and I never turn mine off.....except sometimes in stop and go traffic. I also typically use the motorhome a couple of times a month.
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Old 06-18-2015, 08:15 PM   #36
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Cruise controls on some coaches will have an effect on how and when they work. Some E/brakes won't work at all with the Cruise on. All of this must be determined by YOU and YOUR COACH to determine what governs what, when things are asked for.

Some have actually had their transmissions re-programmed so the E/brake will not come on when the accelerator pedal is released like most do. They set it up so that only when the service brake pedal is touched, THEN the E/brake is applied. It's a matter of choice.
And that cost me my first speeding ticket in about 30 years! New to us Magna the 3 speed jake brake doesn't come on automatically when the pedal is released unlike the previous Dutch Star, plus it's much quieter and smoother.
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Old 06-19-2015, 04:04 PM   #37
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Oh, and I never turn mine off.....except sometimes in stop and go traffic. I also typically use the motorhome a couple of times a month.
I do turn mine off when un-needed. IMO that is likely the reason for the cracked exhaust manifolds so many ISC owners complain about.
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Old 06-19-2015, 11:34 PM   #38
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Got my reply and i also called and talked to the Pac Brake tech. My PacBrake is a transmission retarder. This was what Monaco had designed for this year and model so the tech said. Anyway...all i have to do is just press the pedal down which in turn will downshift the tranny to the desired speed to slow down.

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Old 06-29-2015, 08:50 PM   #39
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I have a 2004 CatC7 and I have a Pac Brake. The Freightliner maintenance guide says to lube it once per year with the lube for the Pac Brake. The manual shows the spots where the brake needs to be lubed. I have to remove a panel in the bedroom to get to it but once I do, it is easy to lubricate.
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Old 07-01-2015, 02:06 AM   #40
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Yes. I had mine stick closed twice on my first long camping trip. Believe me you don't go anywhere when that happens. So my advise is don't neglect that maintenance. It's easy to do.
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