| Author |
Message |
Steven D. Braud (Steve77amg)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 04, 2005 - 1:58 pm: | |
I am removing the motor from my '77 AMG. It has an 8v71 with a 730 Allison three speed trans. There are eight bolts holding the drivesaft to the transmission. The nuts have slots in them for pins but I don't see any pins in them. I have tugged and pulled but can't seem to break any of the nuts loose. This is the last thing that has to be disconnected before I unbolt the cradle. Any help would be greatly appreciated. Thanks. |
Sammy B (Sammy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 04, 2005 - 6:37 pm: | |
Burn them off with a torch, install new ones. |
john w. roan (Chessie4905)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 04, 2005 - 9:00 pm: | |
they could have been loctited...heat one good with a propane torch, let it cool some and try again. If you can get a combination wrench's box end on the nut,slip the box end of another slightly larger combination wrench into the open end of the first wrench, which will give you twice as much leverage.(combination wrench is box end at one end and open end at the other.By the way, some joints have a lot of grease build up....remove as much as you can before you start using a torch, and keep an extinguisher or a five gallon bucket of water handy. |
David Hartley (Drdave)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 04, 2005 - 9:13 pm: | |
If the driveshaft slip joint is on that end of the assembly you could pre-mark the universal joint positions and simply and carefully slide the cradle back and the driveshaft splines will pull out. If its done like the RTS setup the shaft will slide apart.
Then with the cradle out you can use an impact wrench to remove the bolts on the alignment plates.
Easy to get out that way but you have to reassemble the shaft and slip assembly before you put the cradle back in. Then put the bolts in to bolt the plates back together. |
Steven D. Braud (Steve77amg)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 05, 2005 - 12:51 am: | |
Hey Guys, Thanks for the input. I wondered if the driveshaft was made like the PTO shaft between a tractor and a bush hog. Are all bus driveshafts made like that? David your idea seems to be the best. After I slide the cradle out I will have more room to get at those bolts. Thanks again, this board has always been a great source of info and help.
Steve (77AMG) |
David Hartley (Drdave)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 05, 2005 - 5:37 pm: | |
The 55 Scenicruiser I had was even equipped with the slip-joint so it would be a pretty safe guess that most buses with rear engine have a slip-joint driveshaft. I have seen them on big trucks also.
In a car or van and pickup trucks the slip is provided usually by the transmission stub that slides into the back of the transmission.
Industrial duty stuff usually has a fixed u-joint or attach plate on the transmission so the slip-joint driveshaft is used. |
JR
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 06, 2005 - 9:55 pm: | |
I just pulled my engine and even with the bolts out, the shaft still pulled apart at the splined slip joint. You should mark the joint so that it gets back into the same location. The U joints have to be "timed" and oriented the same on both ends. In other words, the welded U joint yokes have to be on the same plane. The driveshaft will vibrate and self destruct if they are not together.
Good Luck, JR |