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Old 09-28-2016, 02:02 PM   #15
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Here are a couple of Air Brake manuals, one US and one for Canada.

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Attached Files
File Type: pdf Air Brake Manual.pdf (2.13 MB, 17 views)
File Type: pdf Air Brake Manual Canada.pdf (2.37 MB, 17 views)
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Old 09-28-2016, 06:55 PM   #16
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Quote:
Originally Posted by slickest1 View Post
Not to beat a dead horse or be nasty, you would be well advised to get an air BRAKE manual and read up on how these things work. Knowledge is safety!!!
x2, x100! Some of the responses in this thread make me extremely nervous to be within 100 yards of some of these rigs. If you truly don't know how your air brakes work, how to check brake clearance, test leak-down, then you have no business behind the wheel of an air brake-equipped vehicle, whether or not the law says you can or not.
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Old 09-28-2016, 07:36 PM   #17
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Quote:
Originally Posted by stevegster View Post
A question popped into my head about my RV and I thought I'd post here to see what people say. I own a 2014 Itasca Solei. It has air breaks, anti-locks etc.
Forum is a great place for these questions. Hope it helps.. The manuals go into a lot of detail on the Air brakes..
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Old 09-29-2016, 09:18 AM   #18
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Forum is a great place for these questions. Hope it helps.. The manuals go into a lot of detail on the Air brakes..
Thanks again. The air brake manuals were extremely helpful.
I concur with your comment as well. If you can't ask questions and continue learning here where can you do it? I'm not sure why others insist on just being mean vs trying to be helpful.

"If you don't have something nice to say, don't say anything at all"
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Old 09-29-2016, 09:34 AM   #19
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So what does one do when they overheat their brakes? Besides lots of smoke coming out.
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Old 09-29-2016, 09:45 AM   #20
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This is one of the reasons I do not like the simple Class C License for motorhome with air brakes. There should be an endorsement on your license for air brakes.

It is scary the number of times I have asked a Diesel Pusher driver about the alarm from the Yellow valve. Too often the answer is "what alarm".

Just from this thread, the Emergency Brakes come on from 15 to 60 psi. The alarm comes on at 60 psi, the Yellow knob pops on at 45 and that is when the spring brakes take over. Since the spring brakes are only on the rear axle, your stopping won't be like hitting your regular brakes, but you will come to a halt.

If you have air brakes, you should study the manuals. You really son't need to do the air brake test as defined in the CDL manual, few truck drivers do. But on startup, you should observe the alarm goes away at 60 psi brake pressure and you should watch your brake pressure climb to about 120 psi where the compressor cuts out. There should be a little pst from the air dryer. The air should not drop below 100 pi where the compressor should cut in again.

Brake air below 100 psi start planning to find a place to have your Air Brakes checked. If the alarm come on, find a place to park, now. It is a lot easier to pull to the side of the road with the rear brakes not locked up.
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Old 09-29-2016, 12:31 PM   #21
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Quote:
Originally Posted by YC1 View Post

So what does one do when they overheat their brakes? Besides lots of smoke coming out.
Myron,

First off I have never & will never overheat my brakes!

But to answer your question for someone that has, I'd be looking for the first runaway truck ramp to get me stopped.

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Old 09-29-2016, 02:37 PM   #22
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A couple of additional items to add to the excellent post by Dale & Mark Bruss.

The compressor must be able to build reservoir air pressure from 50 to 90 psi within three minutes. If unable to do so the compressor requires servicing. A compressor may not be able to build air pressure from 50 to 90 psi within three minutes if the air filter is plugged.

It would also be good to know about "caging" the rear brakes and where the caging bolts are stored. BTW, I would purchase a couple of new caging bolts and store them inside someplace out of the weather, road grime etc. Sometimes once the caging bolt is removed if it can be removed at all it will be useless due to the rust and junk caked onto the bolt.

Caging the rear brakes will be required if the tow vehicle cannot hook up the airline to your air brake system or your engine is not functional.

Last year I had a 200+ mile tow in northern British Columbia where the tow truck had the wrong fitting to get air to my rear brakes and one side of the dually wheels could be caged but the other side could not as the mechanism was out of alignment. We had to stop every 2 hours to run the engine for a few minutes to pump the air system back up to 120 psi.

I had the repair shop replace that spring brake system on that side of the coach.

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Old 09-29-2016, 03:24 PM   #23
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It seems that your reading from a pretty old guide.

The 90 psi in 3 minutes is still current info, but belt driven air compressors are real old school stuff. Last one I saw was on a gas engine, 10 wheel dump truck, from the late 60s. Adjusting the belt was a nightmare.

Back then, they used small intake filters snapped into the compressor intake, but nowdays, the compressor air intake is piped into the engine air filter system. If the engine runs the filter isn't blocked enough to effect the compressor.

As far as carrying extra, brake chamber caging bolts, when we couldn't use them, we backed off the slack adjuster until the rod reached the end of it's travel. Not sure why your tow truck driver didn't do that.

You should never use the cage bolts on your brake chambers, without blocking your wheels. You can run yourself over. IMO, that should be left to the pros.
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Old 09-29-2016, 03:54 PM   #24
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Quote:
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It seems that your reading from a pretty old guide.
Yes that Air Bake Manual IS very old.

I revised my post to eliminate the reference to the compressor belt.

I searched for a more current one and have attached the link below. It is dated 2009.

Air Brake Handbook

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Old 09-29-2016, 04:01 PM   #25
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Here is another document that I had found in my collection that I have on my PC.

It has some Air Brake testing procedures.

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Attached Files
File Type: pdf Air Brake System Test.pdf (237.5 KB, 11 views)
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Old 10-02-2016, 01:15 PM   #26
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Steve, you may want to avail yourself, and wife, of the Freightliner Service "School" course give at their Gaffney SC location. Found it well worth our time detailing the aspects of your diesel coach. They also feed you very well!

While their you can schedule the maintenance required performed by factory techs. It was surprising how much maintenance needed to be done on a "new" coach. We had our 2014 Forza there last summer.
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