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Old 04-28-2014, 05:10 PM   #29
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Quote:
Originally Posted by Fl_Richard View Post
Cooler air at night vs when it was parked and chocked hot. Pressure goes down tire gets a tad flatter and the chocks get tighter. The vehicles arnt moving

Makes perfect sense. Thanks.
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Old 04-29-2014, 07:13 AM   #30
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Originally Posted by Hikerdogs View Post
We use chocks more often than not. About the only place we don't use them is a perfectly level concrete pad. Our motorhome is built on a Ford chassis. The parking brake consists of a single drum and shoe arrangement on the driveshaft. I'm not sure how successful 30 square inches of friction material would be when trying to hold back 22,000 lbs.
That drive shaft brake has incredible braking force as the gearing of the differential works in is favor.
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Old 04-29-2014, 07:44 AM   #31
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Never use chocks, don't even have any.
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Old 04-29-2014, 07:49 AM   #32
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most of my experience is with fire trucks starting in the early seventies. We always had to chock because the rear drum brakes were so hot and faded they would frequently roll as if they weren't even applied. This led to many embarrassing moments until years later when disc brakes came in.
Say you just came down a long steep grade and used your brakes to the fade stage ; which is easy to do. You get out towards the bottom to take a brake and your mh starts to roll ; run forest run. The one downside to drum brakes on the rear is they are the parking brake. I dont carry a chock because I am a charter member of the dumb and tough club.
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Old 04-29-2014, 08:57 PM   #33
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Wheel chocks make sense with any kind of trailer, or if you have hydraulic brakes utilizing the driveshaft e-brake, and no jacks. In my old gasser class A's, 1 with and 1 without jacks, I used chocks with no jacks but never felt any need for them with the jacks down. When jacks were extended, that thing wasn't going anyplace. Even if the jacks sunk into the ground, it would have taken a bulldozer to move it.

With air e-brake and jacks, the use of chocks doesn't compute at all with me. Would you chock prior to setting the jacks? Seems to me that the coach may need to move a bit and reposition itself as the jacks level things up. If you chock after setting the e-brake and jacks, seems you'd be in a big bind when leaving if you forgot to remove the chocks before retracting the jacks. Nope, makes no sense to me...! YMMV

If you are worried that the coach will shift when up on the jacks, it seems that you already flunked "Camping 101" when choosing that site to set up on.
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Old 05-07-2014, 09:38 PM   #34
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Always carry Chocks....because they are required when inspecting and adjusting the Air Brakes!
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Old 05-09-2014, 02:38 PM   #35
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Quote:
Originally Posted by NorthernDriv View Post
Always carry Chocks....because they are required when inspecting and adjusting the Air Brakes!
x2 your comment, NorthernDriv! Also prudent when working under coach even with Jack Stands, etc, in place.
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