Locking Tag Axle Tire
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06-09-2005, 13:32
Post: #17
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Locking Tag Axle Tire
its all about timing jeff! uneven length hoses can cause a brake to pull.
hydraulic brakes can have unequal length lines with no problem..but have you ever noticed on a 3208 diesel engine the injector lines are all bent and twisted and seem too long? they are realy equal length,all 8 lines the same,thats so the timing is right on all cyl's..but,you know all that stuff already! randydupree93wb ----- Original Message ----- From: Jeff Miller To: WanderlodgeForum@yahoogroups.com Sent: Thursday, June 09, 2005 9:05 PM Subject: [WanderlodgeForum] Re: Locking Tag Axle Tire That's funny Randy, you knew he'd bite didn't you? The laws of physics haven't changed Tom, you've obviously just never understood them. The length of air-line doesn't affect ultimate pressure, but it does affect timing which is important in air-brake design. If one brake is supplied pressure before another brake you can get pulling or lockup. As far as one brake locking without the other, several factors can cause asymmetrical braking and traction: Check shock absorbers and suspension links, a binding or broken link can cause asymmetrical downforce and thus traction. A pinched air-bag supply line can cause the pressure to vary between air-bags, a SEVERELY out-of-level condition can cause asymmetrical pressure/traction, brake supply lines can affect braking and cause asymmetrical brake pressure, possibly even a restriction in the tag- axle's R-12 brake relay valve. Mechanical brake problems can cause asymmetrical braking as one brake might have a bad cam or rollers, contaminated brake shoes or incorrect friction material (FF is original, softer can cause locking), incorrectly installed (wrong angle) slack adjusters. Coach loading shouldn't affect tag-axle braking as the tag-axle airbags are tied together and supplied by/at the same pressure, same pressure between airbags will mean same downforce/weight on both sides (or very close). Coach loading affects the side-side weight of the drive axle mostly. If betting, I'd start with: contaminated brakes, wrong brake friction material, incorrectly adjusted or assembled slack adjuster, suspension problem, and move on if those are not the problems. An air pressure gauge comparing brake application pressure between the two sides might also be an interesting test. - Jeff Miller --- In WanderlodgeForum@yahoogroups.com, Tom Warner wrote: > Randy unless the law of physics has changed since I retired 10 years ago a > difference in 1/4" air line lengths of a few feet will not make a > difference in the force that the brake chamber applies to the slack > adjuster.. I would suspect that if one tire is locking up then I would > suspect contaminated brake shoes on that axel or a misadjusted slack adjuster. > > Tom > 1982 FC35 > Vernon Center,NY > > At 12:02 PM 6/9/2005 -0400, you wrote: > >check to make sure that both air lines are the same length.if one has been > >replaced it may be shorter or longer.it does matter..Tom? randydupree93wb ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: http://groups.yahoo.com/group/WanderlodgeForum/ b.. To unsubscribe from this group, send an email to: WanderlodgeForum-unsubscribe@yahoogroups.com c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. [Non-text portions of this message have been removed] |
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Messages In This Thread |
Locking Tag Axle Tire - DAY8293A@... - 06-08-2005, 23:45
Locking Tag Axle Tire - Rex - 06-09-2005, 03:38
Locking Tag Axle Tire - Bob & Carol Howald` - 06-09-2005, 03:54
Locking Tag Axle Tire - randydupree - 06-09-2005, 04:02
Locking Tag Axle Tire - ronmarabito2002 - 06-09-2005, 06:20
Locking Tag Axle Tire - ronmarabito2002 - 06-09-2005, 06:24
Locking Tag Axle Tire - Tom Warner - 06-09-2005, 07:56
Locking Tag Axle Tire - John Suter - 06-09-2005, 08:38
Locking Tag Axle Tire - bobloomas - 06-09-2005, 09:09
Locking Tag Axle Tire - DAY8293A@... - 06-09-2005, 09:51
Locking Tag Axle Tire - randydupree - 06-09-2005, 10:04
Locking Tag Axle Tire - erniecarpet@... - 06-09-2005, 10:48
Locking Tag Axle Tire - Richard Sevey & Carolyn Sevey - 06-09-2005, 10:50
Locking Tag Axle Tire - DAY8293A@... - 06-09-2005, 11:33
Locking Tag Axle Tire - Jeff Miller - 06-09-2005, 13:05
Locking Tag Axle Tire - Jeff Miller - 06-09-2005, 13:16
Locking Tag Axle Tire - randydupree - 06-09-2005 13:32
Locking Tag Axle Tire - randydupree - 06-09-2005, 13:40
Locking Tag Axle Tire - Jeff Miller - 06-09-2005, 13:51
Locking Tag Axle Tire - Jeff Miller - 06-09-2005, 13:54
Locking Tag Axle Tire - randydupree - 06-09-2005, 14:08
Locking Tag Axle Tire - randydupree - 06-09-2005, 14:10
Locking Tag Axle Tire - Jeff Miller - 06-09-2005, 15:06
Locking Tag Axle Tire - Dennis Nichols - 06-09-2005, 15:39
Locking Tag Axle Tire - randydupree - 06-09-2005, 23:17
Locking Tag Axle Tire - randydupree - 06-09-2005, 23:21
Locking Tag Axle Tire - randydupree - 06-09-2005, 23:28
Locking Tag Axle Tire - Stephen Birtles - 06-10-2005, 01:07
Locking Tag Axle Tire - Jeff Miller - 06-10-2005, 01:08
Locking Tag Axle Tire - DAY8293A@... - 06-10-2005, 12:41
Locking Tag Axle Tire - tracyt3 - 06-11-2005, 08:47
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