I can verify that at least on our coach, the parking brakes locked the rear wheels -- it was weird to watch the coach move and the rear wheels skid. The front wheels were turning -- I think -- as I did not stand and observe as the coach slid by (I was moving to fast to get to the door!).
Today we continue to head south!
Cody47
2008 Winnebago Tour 40TD
http://fulltime-rv.blogspot.com/
The spring bakes known as maxy,s on all trucks or air equiped motor homes only work on the rear axles.
THINK WHAT WOULD HAPPEN IF YOU LOST AIR PRESSURE AT 60 MILES PER HOUR? AND YOUR FRONT WHEELS LOCKED "UP"
rebel462 wrote: The spring bakes known as maxy,s on all trucks or air equiped motor homes only work on the rear axles.
THINK WHAT WOULD HAPPEN IF YOU LOST AIR PRESSURE AT 60 MILES PER HOUR? AND YOUR FRONT WHEELS LOCKED "UP"
And thats why spring brakes (parking brakes) are only on the rear wheels. Seems to me it was a question on our Air brake course exam. It probably is on most air brake courses.
KOG wrote: Air parking brake does lock all wheels. This was a gas coach or one with hydraulic brakes and parking brake only on the rear.
All diesels I've driven only have spring brakes in the rear which apply when you release the air.
Then you haven't driven MH's much!
Service brakes are applied by air pressure on front and rear, the spring driven parking brake sets when pressure is released and only on the rear. Look it up in your owners manual.
Deen,
It appears your post was pointed toward mckee ?? Please tell us what was wrong with his post ??
As I read mckee's post and your post, I see nothing incorrect with either.
Having driven the Big rigs that GO shh shhh and bend in the middle, I can tell you with certainty all the Air Brake systems I have observed only lock up the drive wheels and by using a separate button the trailer brakes. I have chased down a few rigs in my life but never from sliding on ice. Get out of the Cold and Good Luck.
rv2go wrote: Correct me if I am wrong, when you apply the air parking brake, does it not just operate the rear barkes?
That's probably why it rolled.You only have parking brakes on the axles with a maxi brake chamber. He might have also had one of those out of adjustment if it doesn't have automatic slack adjusters.Probably was the ice and only one axle parking brakes that cause the unit to move thou.
2005 MONACO DIPLOMAT 40DST
2005 Dodge Ram Quad Cab 1500 4X4
2006 Club Car
WIFE,DAUGHTER, SON,AND MAX THE AIREDALE WWW.GrandmasChristmas.com
rv2go wrote: Correct me if I am wrong, when you apply the air parking brake, does it not just operate the rear barkes?
Sorry double post.The reason that you have a maxi brake is that years ago, air was used to park trailers and trucks. This worked well until you had an air leak, and your vehicle rolled away. They changed this so now a big spring holds the brakes for parking and you need air to release the parking brake and air to apply the brakes to stop.Hope this clears it up for those that are confused.Jerry
* This post was
edited 12/23/07 03:58pm by ntagnizr *
Cody47 wrote: Good comment about leaving earlier -- we just started fulltiming yesterday and I had to work until last Friday for retirement. So far, we have had an exciting fulltime start -- we are really looking forward to warmer weather!
Congratulations on retiring and fulltiming. Wish it were us!
Safe Travels
Tony & Maria
2007 Tiffin Phaeton 40 QSH
Cat C7 360
Freightliner Chassis
Allison 3000
Good Sam, KOA, Passport America
Towing a Jeep Liberty
Chasing down a moving vehicle can be VERY dangerous.
I have a very good friend who tried to climb up on a semi-truck that was slowly rolling away. A little oil slick or fuel slick on the pavement, left his shoes just slippery enough for his feet to slip off the saddle tank and under the tandems. Seventeen major operations, more than a year in a body cast and/or traction later, he lives with the pain and discomfort of his error in judgement. He's lucky, I guess, he's alive to tell about it. I won't repeat his description of the noises he heard as the tandems rolled over his pelvis. The terrible irony was that the truck only rolled another 10 yards and came to a stop on it's own.
Try to think it through at least a little before you try to jump on or in a moving vehicle.
I'm really glad this worked out OK for you, and it gives us all a few more things to consider as we operate our RVs.
On another note, I'm really jealous that you can leave this cold weather crap.........
Me, the DW, 2 dogs and more.
1998 Overland Larado, 41', one slide, 325 Cummins, '02 Jeep Liberty Upgrades we've done: SMI-Air Force 1 towed brake system, replaced all 3 TVs with new hiDef LCDs, inst. Xantrex 2Kw Inverter, Prog. Ind. HW50 surge protector
I would have done the same thing, run out and try to stop my coach from running away. But on the same subject, when I was working on this particular interstate road job, the grease monkey was greasing a rig when his grease truck starting rolling away. He ran to stop it, jumping on the running board but slipped and fell with his one leg going under the wheel. Needless to say, it put a hurt on him. He spent many months healing, then decided to retire. I think old arther has came to take up residence in that leg. You never know what is going to happen, remember what Forest Gumps mother told him: "Life is like a box of chocolates, you never know what your going to get!"
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'94 Bounder 31K
