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| Re: A bent bogie problem [message #152982 is a reply to message #152974] |
Wed, 14 December 2011 19:56   |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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My first question is:
Is that wheel parked in the neutral position? Meaning is was not parked while turning the coach. If you move the coach forward and backwards 2 meters or so will the wheel still sit the same position?
Assuming those pictures are with the wheels in the neutral position then you have one heck of a bend. I'm wondering how it got that way. It is usually the leading wheel that get bent from hitting curbs.
I have never done this but I saw where someone welded a piece of steel box tubing or unistrut to the back side of a GMC wheel. With the wheel mounted (reversed) you now have a long lever that you can push or pull on the tube to get the bogie back in position.
The toe is definitely off and I would fix that first.
Looking at the camber, it could be fixed the same way except you are probably going to need to put it on a 4 post hoist to get it up in the air to have room to pry on it.
I have fixed bent in bogies but never fixed one that is bent out like yours.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] A bent bogie problem [message #152984 is a reply to message #152974] |
Wed, 14 December 2011 20:25 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Jay,
On the way to Alaska in 2000, I bent the RR arm out about 3/4". After
finding no one in Alaska who could help, I called Alex Sirum. He advised
that they have an old hub (or maybe wheel) with an 8' steel pipe welded to
it which they use to bend arms. Having no access to the materials for that
option, I calculated that the rate of wear would let me get back to GA if I
rotated all 6 new tires through that position,
Then, at a USAF campground I found a 6" OD guard pole buried down into the
permafrost and filled with concrete. I removed the hub cap and grease cap,
pulled up beside the post with just room for my 6-ton bottle jack to fit
between it and the end of the spindle. After several "try it and measure"
cycles, which wound up sliding the other 3 rear wheels about 2" through the
gravel, the subject arm held its position. And still does.
When I made it back to Orlando, FL, Jim Bounds and I corrected the R middle
arm: With the coach parked in the doorway of his concrete block garage, we
put a 2x4 between the frame and the door casing on the opposite side, then
used a Port-a-Power to push the arm back into position, again by repeated
"try a little, measure, then try a little more" cycles. That one's still
set too.
Hope some of these ideas will help, but your situation sure looks extreme
-- be sure none of it is due to bad bushings or rusted frame before trying
any of them.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Wed, Dec 14, 2011 at 7:49 PM, Jay Fox wrote:
>
>
> I have a severe bent back bogie that needs to be corrected, Can I do that
> while it's still on the unit?
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: A bent bogie problem [message #152987 is a reply to message #152974] |
Wed, 14 December 2011 20:52 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Are you sure the frame is solid where the saddle mounts to the frame> Common rust point with trapped moisture. I'd look at that first to be sure.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: A bent bogie problem [message #152992 is a reply to message #152987] |
Wed, 14 December 2011 21:37 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
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John,
Weather the frame is rusted or not, that arm has to be adjusted to save the tire and road handling.
Would true-track have prevented that from happening?
Thinking out loud.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
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| Re: A bent bogie problem [message #153006 is a reply to message #152974] |
Wed, 14 December 2011 23:13 |
seven
Messages: 322
Registered: July 2008
Location: Calgary Canada
Karma: 0
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I bought the unit this way and when it is finally a trailer it will have to be straight, Thank you for the ideas know what I know now I should be able to fix it up,I think just pull it up by a telephone poll and try the jack first.
Jay Fox
Calgary AB
73 Painted Desert (Turtle)
78 Transmode (Trailer Donor)
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| Re: A bent bogie problem [message #153049 is a reply to message #153037] |
Thu, 15 December 2011 11:45 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Larry wrote on Thu, 15 December 2011 09:17 |
No matter how you accomplish the task of bending it back into place, you are going to be amazed at how much you have to bend it so that it springs back into it's proper spot. My 3rd axle passenger side arm was bent out of alignment 5/8"" toward the frame. Using a portapower between the frame (actually the shock mount bolt) and the arm, I powered it out first to 1". No change in alignment. Then 1 1/4" ...no change....1 1/2" each time using a ball pein hammer on it...still no movement. By now I'm wondering if I'm going to break it. It took a full 2" of bend to get it to spring back to where it should have been before it was bent in. JWID.
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That's the nice thing about nodular iron. I suspect a grey iron casting would crack easily.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: A bent bogie problem [message #153064 is a reply to message #152974] |
Thu, 15 December 2011 13:42 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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On this:
'John,
Weather the frame is rusted or not, that arm has to be adjusted to save the tire and road handling.'
I'd say trying to allign it if the frame is rusted and soft swiss cheese is like trying to set the front alignment with bad tie rod ends. You can set it, but it means absolutely nothing. So just saying.... to do a visual frame inspection and a play test on the bushings first. I understand that if the frame was shot the whole assy would yaw, not just the leading wheel, but you can't really see in the pic.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: A bent bogie problem [message #153078 is a reply to message #152974] |
Thu, 15 December 2011 15:31 |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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I wonder how loose the bogie pins are?
It might require more than straightening.
Regards,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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