| Wheel hop [message #73873] |
Sun, 14 February 2010 23:48  |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Taking the coach out on a 200 mile cruise this weekend and I noticed a tendency for the right front wheel to "hop" with relatively high frequency occasionally. It wasn't continuous like a tire out of balance and didn't seem to come or go with a certain speed.
The torsion bars are set properly and it sits level left to right. Could it be a bad shock? A- Arm bushing?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Wheel hop [message #73874 is a reply to message #73873] |
Sun, 14 February 2010 23:57  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I vote for a shock. If you are doubt that is the problem, just swap them side to side. If the bug does not move after the shock swap, swap the tires side to side.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Wheel hop [message #73882 is a reply to message #73873] |
Mon, 15 February 2010 05:04 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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in my case, it was torque-hop, and would start when starting a pull , like
going up a hill. this was caused by worn cv joints
http://www.gmcmhphotos.com/photos/showphoto.php?photo=7209
you can switch the drive axels and change the wear patterns, both axles are
the same, and sometimes the problem will go away.
In my case the PO had already done this ;>) so I had to rebuild the cv
joints.
gene
On Sun, Feb 14, 2010 at 9:48 PM, Randy <Acrosport2@hotmail.com> wrote:
>
>
> Taking the coach out on a 200 mile cruise this weekend and I noticed a
> tendency for the right front wheel to "hop" with relatively high frequency
> occasionally. It wasn't continuous like a tire out of balance and didn't
> seem to come or go with a certain speed.
>
> The torsion bars are set properly and it sits level left to right. Could it
> be a bad shock? A- Arm bushing?
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Wheel hop [message #74006 is a reply to message #73933] |
Tue, 16 February 2010 02:39 |
Chuck Garton
Messages: 54
Registered: June 2006
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Mine was not sloppy; it was destroyed, no bearings left.
Chuck
On Mon, Feb 15, 2010 at 4:51 PM, Kingsley Coach <kingsleygmc@gmail.com> wrote:
> Chuck
>
> I also had a sloppy support bearing/shaft and replaced it, only to find it
> was no better. Years ago someone said that the play there was just the way
> it is...I was told not to bother replacing but I knew better....wastted my
> time !
> My thoughts anyway..
>
> Mike in NS
>
> On Mon, Feb 15, 2010 at 7:31 PM, Chris Choffat <cchoffataz@yahoo.com> wrote:
>
>>
>>
>> Was it only on the way back? Maybe your coach isn't used to all that extra
>> weight of a working genset!!!! :lol:
>> --
>> -Chr$: Perpetual SmartAss
>> 77 Ex-Kingsley 455, Power Drive, 3:21 FD U S S Kobiashi Maru: The
>> Engineer's Motorhome
>> S T I L L - U N D E R - C O N S T R U C T I O N
>> Scottsdale, AZ
>> Photosite: Chrisc "It has Begun"
>> _______________________________________________
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>
>
>
> --
> Michael Beaton
> 1977 Kingsley 26-11
> 1977 Eleganza II 26-3
> Antigonish, NS
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| Re: Wheel hop [message #74031 is a reply to message #74023] |
Tue, 16 February 2010 09:20 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Have you ever replaced the wheel bearings?
I get some wheel hop on the local freeway, not sure if it is the expansion joints you can see through the black top or something else. I did my bearings several years ago, but they only have ~300 miles on them. I plan to check the preload again...
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Wheel hop [message #74040 is a reply to message #73873] |
Tue, 16 February 2010 11:37 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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One bolt test instead of 8 lugs. Remove the lower shock mount and exercise the shock by hand to see if has firm even resistance throughout travel. Sometimes the innards come loose and there is like and inch of dead spot in the stroke.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Wheel hop [message #74053 is a reply to message #74040] |
Tue, 16 February 2010 15:01 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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| JohnL455 wrote on Tue, 16 February 2010 12:37 |
One bolt test instead of 8 lugs. Remove the lower shock mount and exercise the shock by hand to see if has firm even resistance throughout travel. Sometimes the innards come loose and there is like and inch of dead spot in the stroke.
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Sir: I believe the stock black Delco shocks were reg shocks, however if a PO has changed to white or yellow ones, they probably are gas assist and should have a fair amount of closing resistance and should extend if not bolted up. If not they are bad.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Wheel hop [message #74067 is a reply to message #74031] |
Tue, 16 February 2010 17:19 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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[quote title=Chr$ wrote on Tue, 16 February 2010 08:20]Have you ever replaced the wheel bearings?
quote]
No, I haven't. I want to watch someone at least once or twice before I watch someone do mine. Volunteers?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Wheel hop [message #74078 is a reply to message #74067] |
Tue, 16 February 2010 18:40 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Randy, it was one of the first things I did to my coach when I bought it. We can get the tool locally and do yours.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Wheel hop [message #74093 is a reply to message #73873] |
Tue, 16 February 2010 20:44 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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Wheel hop is almost always due to bad shocks. shock absorbers have tha ability to control many different frequencies all the way from ride travel which is about 1 hz to 10-20 hz which is wheel hop frequency. Depending on the wheels an tires you have, i suspect you are feeling 13 hz wheel hop.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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