| Author | Message | ||
| Jerry Coombs (Jerry_c)
Registered Member Username: Jerry_c Post Number: 20 Registered: 11-2005 Posted From: 75.132.177.5  Rating: N/A |
I'm almost afraid to ask --- I've a 4106 with 730 auto xmtn. The oil in the xmtn has always been mostly clean but lately noticed it was getting black. To help find other leaks I put in a floresent dye in the engine and noticed the dye was showing up on the xmtn dip stick (you check with a UV or black light and any leaks show up brightly). About the only way I know oil can leak between the two is the flywheel oil seal -- and that is NOT going to be fun to replace... rather if that someone else will be doing that work. Any other thoughts? | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1749 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
I wonder if someone didn't install the special double lip seal that is supposed to be there instead of the single one used with manual trans. I think 4106 used a dry clutch? Hey, it could be worse. What if you had an MCI, Eagle, or Prevost? Good hard concrete surface, good heavy duty trans jack, blocking, and some care, it's not too bad. Be sure to check seal surface on crankshaft. I think there is a rub ring for that. | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 307 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Jerry It has to be the flywheel oil seal. A V730 with an 8V71 must use the double lip seal. Crankshaft double lip seal - #8927749 Wear sleeve - #5197159 Bill | ||
| Ken Barnett (Dieselbusparts)
Registered Member Username: Dieselbusparts Post Number: 12 Registered: 7-2009 Posted From: 76.26.111.30 Rating: N/A |
I don't own a 4106, I have RTS's with v731 & V730 AA trans, what is a V730 xmtn? | ||
| Bruce Henderson (Oonrahnjay)
Registered Member Username: Oonrahnjay Post Number: 480 Registered: 8-2004 Posted From: 70.60.107.113  Rating: N/A |
Ken, I'm guessing that "xmtn" is "Trans" = x and "mtn" = mission. | ||
| George M. Todd (George_mc6)
Registered Member Username: George_mc6 Post Number: 923 Registered: 8-2006 Posted From: 99.39.13.151 Rating: N/A |
I'm guessing along with Bruce. In the electrical field, a transformer is known as an xformer, and a transmitter as an xmitter. One other thought on the oil contamination however, is the oil cooler. If this bus has a "dual" engine-mounted oil cooler, (one path for the engine oil, and one path for the trans oil) mounted on the side of the block in the cooling water, then it may be the problem. Usually the failure is water contamination, as they rust from contact with the engine water, the oils don't attack their side of the cooler... G | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1751 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
most of the GM's with a V730,1 have the trans cooler separate from engine oil cooler. | ||
| Ken Barnett (Dieselbusparts)
Registered Member Username: Dieselbusparts Post Number: 13 Registered: 7-2009 Posted From: 76.26.111.30 Rating: N/A |
If that's the case than it could also be the cooler core, the oil and coolant do have a chance of contamination, the core may have frozen and cracked or the soldier on the core tubes may have failed, that would be much nicer than the alternative. Speaking of coolers if Bob Baldwin is reading, hows your cooler working out? | ||
| Jerry Coombs (Jerry_c)
Registered Member Username: Jerry_c Post Number: 22 Registered: 11-2005 Posted From: 71.52.110.125 Rating: N/A |
In my case no other chance of engine to transmission (yes -- xmtn) crossover as I have ONLY a seperate xmtn oil / air radiator mounted in front of my engine radiator. It's gonna be that seal I'm sure but I WILL NOT be replacing it (nor hopefully it gets so bad) on this snowbird trip through Florida. | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1765 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
I noticed on one of the DDA part sites that they listed right and left hand seals, and also multi directional ones. |