The first time that I ever removed those large axle nut. A big truck service center had messed with them for the PO. Got the cotter key out. Ended up using a big 3/4" drive ratchet. Put a 6 ft pipe over the ratchet. Put me at 195 lbs. Standing on the end of the pipe. Next I had to jump on that pipe to get each nut loose. I didn't reuse the axles, or nuts. How did they get them that tight. And how did the axle, and nut take that? Bob Dunahugh 78 Royale.
Front Axle Rplacement ( times two )
- Thread starter Bob Dunahugh
- Start date
Sounds about right. I have broken two 1/2" breaker bars trying to loosen
that nut.
> The first time that I ever removed those large axle nut. A big truck
> service center had messed with them for the PO. Got the cotter key out.
> Ended up using a big 3/4" drive ratchet. Put a 6 ft pipe over the
> ratchet. Put me at 195 lbs. Standing on the end of the pipe. Next I had to
> jump on that pipe to get each nut loose. I didn't reuse the axles, or nuts.
> How did they get them that tight. And how did the axle, and nut take that?
> Bob Dunahugh 78 Royale.
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--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
that nut.
> The first time that I ever removed those large axle nut. A big truck
> service center had messed with them for the PO. Got the cotter key out.
> Ended up using a big 3/4" drive ratchet. Put a 6 ft pipe over the
> ratchet. Put me at 195 lbs. Standing on the end of the pipe. Next I had to
> jump on that pipe to get each nut loose. I didn't reuse the axles, or nuts.
> How did they get them that tight. And how did the axle, and nut take that?
> Bob Dunahugh 78 Royale.
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--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
The last one of those I worked on, my daughter set up a 3/4" breaker bar with a 5 feet cheater extension pipe. At 120 pounds she could not break them
loose. I had to jump on it with my 200 pounds to get them loose.
A side note.
I do not like putting all of that torque on the trans parking pawl. So when we do it, I have someone inside on the brakes while the other person
jumps on the cheater.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
loose. I had to jump on it with my 200 pounds to get them loose.
A side note.
I do not like putting all of that torque on the trans parking pawl. So when we do it, I have someone inside on the brakes while the other person
jumps on the cheater.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
> The first time that I ever removed those large axle nut. A big truck service center had messed with them for the PO. Got the cotter key out. Ended
> up using a big 3/4" drive ratchet. Put a 6 ft pipe over the ratchet. Put me at 195 lbs. Standing on the end of the pipe. Next I had to jump on
> that pipe to get each nut loose. I didn't reuse the axles, or nuts. How did they get them that tight. And how did the axle, and nut take that?
> Bob Dunahugh
> 78 Royale.
Bob,
When I let my compressor turn off at 150psi, my good CP air impact will probably get them that tight.
If you run the numbers on the nut and knuckle stub, the load it can take is WAY UP THERE. (That means he forgot what he did figure out years ago.)
The book says something like: Twist it to X-lbft and then go to the next place you can get the cotter in. Well, if you just missed one, that means
you need another 27° and that may be a lot.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
> up using a big 3/4" drive ratchet. Put a 6 ft pipe over the ratchet. Put me at 195 lbs. Standing on the end of the pipe. Next I had to jump on
> that pipe to get each nut loose. I didn't reuse the axles, or nuts. How did they get them that tight. And how did the axle, and nut take that?
> Bob Dunahugh
> 78 Royale.
Bob,
When I let my compressor turn off at 150psi, my good CP air impact will probably get them that tight.
If you run the numbers on the nut and knuckle stub, the load it can take is WAY UP THERE. (That means he forgot what he did figure out years ago.)
The book says something like: Twist it to X-lbft and then go to the next place you can get the cotter in. Well, if you just missed one, that means
you need another 27° and that may be a lot.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
A lot of that is caused by idiots with 3/4 " air ratchets. Mine will easily
do 500 foot pounds. On several occasions, it had to struggle to remove
those nuts someone else tightened.
Jim Hupy
> > The first time that I ever removed those large axle nut. A big truck
> service center had messed with them for the PO. Got the cotter key out.
> Ended
> > up using a big 3/4" drive ratchet. Put a 6 ft pipe over the ratchet.
> Put me at 195 lbs. Standing on the end of the pipe. Next I had to jump on
> > that pipe to get each nut loose. I didn't reuse the axles, or nuts. How
> did they get them that tight. And how did the axle, and nut take that?
> > Bob Dunahugh
> > 78 Royale.
>
> Bob,
>
> When I let my compressor turn off at 150psi, my good CP air impact will
> probably get them that tight.
>
> If you run the numbers on the nut and knuckle stub, the load it can take
> is WAY UP THERE. (That means he forgot what he did figure out years ago.)
>
> The book says something like: Twist it to X-lbft and then go to the next
> place you can get the cotter in. Well, if you just missed one, that means
> you need another 27° and that may be a lot.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
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>
do 500 foot pounds. On several occasions, it had to struggle to remove
those nuts someone else tightened.
Jim Hupy
> > The first time that I ever removed those large axle nut. A big truck
> service center had messed with them for the PO. Got the cotter key out.
> Ended
> > up using a big 3/4" drive ratchet. Put a 6 ft pipe over the ratchet.
> Put me at 195 lbs. Standing on the end of the pipe. Next I had to jump on
> > that pipe to get each nut loose. I didn't reuse the axles, or nuts. How
> did they get them that tight. And how did the axle, and nut take that?
> > Bob Dunahugh
> > 78 Royale.
>
> Bob,
>
> When I let my compressor turn off at 150psi, my good CP air impact will
> probably get them that tight.
>
> If you run the numbers on the nut and knuckle stub, the load it can take
> is WAY UP THERE. (That means he forgot what he did figure out years ago.)
>
> The book says something like: Twist it to X-lbft and then go to the next
> place you can get the cotter in. Well, if you just missed one, that means
> you need another 27° and that may be a lot.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
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>
When Chuck Boyd was installing new bearings in my front wheels, he discovered both axle nuts to be torqued to 0 ft/lbs! Only the cotter pins were
keeping the nuts from falling off. PO had front end work done by a big Truck Repair joint in Jackson, MS according to receipts he left with me. So
keep those nuts torqued to spec, it actually helps the coach to drive and steer better, and keeps people safe.
Jerry
--
Jerry Sitzlar..... 77 Eleganza II, Twin bed, dry bath......
Lenoir City, TN (near Knoxville)
keeping the nuts from falling off. PO had front end work done by a big Truck Repair joint in Jackson, MS according to receipts he left with me. So
keep those nuts torqued to spec, it actually helps the coach to drive and steer better, and keeps people safe.
Jerry
--
Jerry Sitzlar..... 77 Eleganza II, Twin bed, dry bath......
Lenoir City, TN (near Knoxville)
I have zirk fittings on my front knuckles. To grease the front bearings, once a year, I pull the axle nut off, shove the axle in about an inch or so
and apply grease to the dirk until I see new grease come out around the seal. I have always felt (JMHO) while you need enough torque to hold it
together, that the torque called for was excessive for what that nut has to do. So, I torque it up to 100ftlbs, and then torque to the nearest spot
that the cotter pin will go in. Been doing that since 1995 with no issues. Comes off relatively easy for greasing next year. Just what I do.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
and apply grease to the dirk until I see new grease come out around the seal. I have always felt (JMHO) while you need enough torque to hold it
together, that the torque called for was excessive for what that nut has to do. So, I torque it up to 100ftlbs, and then torque to the nearest spot
that the cotter pin will go in. Been doing that since 1995 with no issues. Comes off relatively easy for greasing next year. Just what I do.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
Nothing wrong with following the official service manual recommended
procedure. Tighten to recommended torque, if the cotter pin holes don't
line up, then tighten the nut until a new cotter pin can be fitted.
Jim Hupy
> The drive shaft axle nut torque on a 2007 Dodge caravan
> is 180 lbs/ft. I'd be leary about anything less
> on a GMC HH.
> --
> DAVE KING
> lurker, wannabe
> Toronto, Ontario, Canada
>
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procedure. Tighten to recommended torque, if the cotter pin holes don't
line up, then tighten the nut until a new cotter pin can be fitted.
Jim Hupy
> The drive shaft axle nut torque on a 2007 Dodge caravan
> is 180 lbs/ft. I'd be leary about anything less
> on a GMC HH.
> --
> DAVE KING
> lurker, wannabe
> Toronto, Ontario, Canada
>
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