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Old 08-16-2010, 05:49 PM   #21
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Originally Posted by blkmagikca View Post

As for the Jake brake (or extarder, also called an exhaust brake)
Probably a typo, but the word is "retarder".

It's 30+ years since I drove anything with air brakes, but what I remember is do not dump all your air! That means not to keep hitting the brake pedal over and over.

Gene
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Old 08-21-2010, 12:42 AM   #22
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Actually, the metal plate on the dash which has the switch for the Jake says "Extarder".

You still have to keep an eye on the air pressure, and watch that it doesn't drop below 90 psi - max, as you know, is 128 psi. Properly using the Jake when going downhill will definitely prevent your dumping your air.
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Old 08-21-2010, 06:10 AM   #23
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Got it and drove for a day now around highway and surface streets. Got the hang of it pretty quickly. The steering does seem wobbly so the steersafe is something i may look into.

It's got a Pacbrake, which is the exhaust brake. It's automatic. No separate pedal or switch. I suppose the only way to tell its working is to release the gas pedal and the speed drops? PO says it doesn't activate until going at least 30mph.

Took it for an alignment and the tech said I had hydraulic brakes. So what's with the knob I use to set the brake and the swoosh that goes along with it?

Lots to learn, found out today about different sewer hose fittings sizes...after i bought a kit. Back to Camping World.

Thanks for the replies, it's been great preparation.

Gary
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Old 08-21-2010, 07:26 PM   #24
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Quote:
Originally Posted by blkmagikca View Post
Actually, the metal plate on the dash which has the switch for the Jake says "Extarder".
Sounds like Extarder is a name used by the manufacturer for an exhaust brake. Retarder is more inclusive name for a variety of braking systems: http://en.wikipedia.org/wiki/Retarde...al_engineering)

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Old 08-21-2010, 09:43 PM   #25
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Wow, all good advice!
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Old 08-22-2010, 10:47 AM   #26
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Originally Posted by Pomfritz View Post
It's got a Pacbrake, which is the exhaust brake. It's automatic. No separate pedal or switch. I suppose the only way to tell its working is to release the gas pedal and the speed drops? PO says it doesn't activate until going at least 30mph.

Took it for an alignment and the tech said I had hydraulic brakes. So what's with the knob I use to set the brake and the swoosh that goes along with it?
Gary
Your brakes are air over hydraulic - the actual brake mechanism is hydraulic (master cylinders and wheel cylinders, but instead of having the brakes mechanically activated by a brake pedal with vacuum assist as in most cars, your master cylinders are activated by air pressure. So your brake pedal is an air valve (mine is a treadle that looks just like the accelerator) that allows air to activate the master brake cylinders. Your parking brake is spring activated and is inboard either on the drive shaft or the axles. The parking brake is released by air pressure, and cannot be released unless there is a minimum of 50 psi of air. One way to test this is to stop on a level place, place the transmission in neutral and turn off the ignition. Then, without pulling out the parking brake (the yellow square-shaped valve on your dash) pump your brakes to dump the air. Watch the air pressure gauges, and you should see that about 50 psi, the yellow parking valve will pop out. So the whoosh you hear when you pull out the parking brake knob is the air used to release the parking brake being let out so that the spring can set that brake.

There is an air compressor attached to your engine which supplies air pressure to both the brakes and the turbo charger. The air for the brakes is pumped into a 3-chamber tank - the first is the input tank, followed by a primary and secondary tanks. There are one way valves that allow the air to flow from the input to the primary and then to the secondary. The primary tank is the place where any moisture in the air is precipitated. The spitter valve of that tank is the one you hear when 128 psi of air pressure has been attained - it spits out any precipitated moisture.

The primary tank and the secondary tank activate the front and rear brakes - the secondary one (I believe) also provides air to release the parking brake.

The PAC brake (AKA Jake brake) is an air activated valve that partially blocks the engine exhaust where it leaves the manifold to provide back pressure to use as an engine brake. When the PAC brake is engaged, the accelerator is disabled (in my rig) - in your rig, the PAC brake will disable when the accelerator is enabled.

I know that this sounds a bit complicated - it did to me when I first got my LY, but having taken the air brake course for my drivers license, I now understand how it all works. One mechanic told me that the Pac brake was a "use it or lose it" issue - if it is not used at all, the mechanism will seize. I use it whenever I am slowing down or coming to a stop. In your case, having the newer Allison transmission that is automatic.

Enjoy your LY - they're well built to last a long time with proper maintenance.
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Old 08-30-2010, 08:50 PM   #27
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Thanks for the info. Now i know what the front and rear air pressure guages are for! I thought it was for air bags or?

So we are nearing the completion of our trip back, nearly 2,000 miles. Wife and I have split the driving and man does that help. She loves driving it and is learning fast on the manuevering. Aside from the fact that we damaged the steps when they deployed while driving, bentsome lower panels while getting into a tight camp space, had an aux fan on the radiator bust a flimsy plastic mount and punture it, lost a starter due to massive oil collecting in the flywheel housing, needing to replace the rear main seal which cuased the oil biildup it, it's been a great anf uneventful first shakedown cruise.

After the repairs the rig handled crossing the mojave nicely and the trip up and down the grapevine outside of LA went smoothly. Engine temp kept in the 180 (mostly) to 200 range. Oil pressure right about 58 psi
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Old 08-31-2010, 12:30 AM   #28
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Uh, the auxiliary fan you're talking about is to cool the condenser for the air conditioner - the radiator is in the back. A word of warning, if the fan to cool the condenser doesn't function, your dash a/c will stop working.

Sounds like quite the shakedown. Reminds me of my first trip from Ontario to Arizona 2 years ago - mega bucks because proper maintenance had not been done. "Proper" is the operative word - until I found competent techs to do the work.

I, too, had the rear engine seal replaced a couple of months ago. However, the only hassle I had was that Cummins initially didn't supply the correct gasket between the exhaust manifold and the jake brake.
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Old 09-01-2010, 08:32 PM   #29
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Driving and enjoying your AS Classic Pusher 36

So, how was your drive home after all? I am currently on my way back from Florida with my newly purchased 1995 Classic Pusher 36 and am loving everything about it! Here is a picture of it parked amongst some boats at the marina I stopped at to visit with relatives. The term "Land Yacht" would fit it don't you think so?
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