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#47780 07/17/2005 8:39 AM | Joined: Oct 2004 Posts: 235 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2004 Posts: 235 | Ok guys. I have a 41 half ton. I've just finished the king pins. I had to replace the spindles as one was too badly worn and the other had a slight twist in the shaft. I've put everything back together and noticed that on the side which had the twisted spindle, the brake drum is not an even fit to the backing plate. One side of the drum fits in flush inside the backing plate lip but the other sits out a little. I've still got the truck on axle stands. Ther brakes seem to work ok although I haven't taken it out for a road test yet. Just wondering what your thoughts are on this and whether it would be ok to take the truck back on the road.
Cheers
Bob | | |
#47781 07/17/2005 2:15 PM | Joined: Sep 2003 Posts: 343 Member | | Member Joined: Sep 2003 Posts: 343 | I would check to see if the drum is warped by placing it on a flat surface (mark the suspected high spot before you pull the drum). Also make sure the mounting surfaces are clean.
1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport
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#47782 07/17/2005 4:41 PM | Joined: Feb 2004 Posts: 29,763 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,763 | It sounds to me like you've got a bent backing plate. If the drum was warped, the tight spot would rotate with the drum. Pull the drum and the brake shoes back off, down to a bare spindle and backing plate, and do some measuring from the end of the spindle to various points around the edge of the backing plate. If it's bent, straightening it might be a real challenge. I'd expect uneven brake shoe wear if it's allowed to stay out of alignment.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#47783 07/17/2005 6:48 PM | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Is it possible one of the spacers between the spindle and backing plate fell out?
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#47784 07/18/2005 2:42 AM | Joined: Oct 2004 Posts: 235 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2004 Posts: 235 | Thanks for the suggestions guys. I had a look at it this morning and Jerry you were on the money mate. There is a wee bend in the backing plate. I'll see about sourcing another. Allowing for some uneven shoe wear would it be ok to use as is for a short time?
Thanks again fellas
Bob | | |
#47785 07/18/2005 12:37 PM | Joined: Apr 2005 Posts: 196 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2005 Posts: 196 | Bob,
I'm guessing that you probably did NOT bend it in the things YOU have done. Take a look at the old shoes you removed to check for uneven wear on them. You still may want to replace the back plate but this should give you an answer as to whether it would be ok to use it as is for a short while.
Rance
66 C10 FS/LB 292/4-spd manual (I also enjoy Hang Gliding)
I'm too sexy for my hair, that's why it isn't there
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#47786 07/18/2005 4:12 PM | Joined: Feb 2004 Posts: 29,763 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,763 | It might be possible to remove the backing plate, and do a little hammer-and-anvil work to straighten it. There's nothing fancy about it, it's just a steel stamping with no heat-treatment or special hardening. Try a little blacksmithing before you scrap it.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#47787 07/19/2005 12:47 AM | Joined: Oct 2004 Posts: 235 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2004 Posts: 235 | Rance. It would have been like that since I've had the truck. Just hadn't noticed before.
Jerry. I'll give it a go and try and straighten it. I did a pretty good job of remodelling my thumb when I was doing the king pins so the backing plate should be a breeze.
Cheers guys
Bob | | |
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