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| Pinging El Pescador.. Steel sliding s... |
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Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 380
Registered: 03-2009
| | Posted on Friday, July 10, 2009 - 12:45 am: | 
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Eduardo, I receieve a call from a man in Virginia who I helped convert a 460 OMC KC over to a AQ series DP-C drive a few years back.
Turns out that his DPC is one that Volvo used the Steel Sliding Sleeve and Special Coated gear cups......
Well, he is stuck in FWD gear (lower driven gear/cup).
Typically, we'd take a unit like this apart... assess it.... maybe replace the brass sleeve.... lap the cups...... and say goodbye to it!
With this dang coating, we don't have that option!
He may be sending the transmission to me to look at..... Or, I may be walking him through the tear down procedure... not sure yet!
Now, here is my question: (and thanks to anyone who may know the answer to this)
This steel sliding sleeeve/coated gear cup caused some issues in some models.
What I am curious about, is if a brass sliding sleeve can replace the steel sleeve if the cups were to be polished and lapped, as to get rid of the coating!!!!!
The angles appear to be the same on each sliding sleeve. (I had one on the bench today, and all looks very much the same)..... but of course, Volvo makes no referrence to this being done. I'm sure that they want you to do a complete gear/sleeve set replacement. Cha Ching! $$$$$
Well, I like to think outside of the box sometimes but I don't believe that we can make any changes to the surface of the cups, yet stay with the steel sliding sleeve!
Do you, or any of you guys, have some thoughts or experience with an issue like this?????
I want to help him out!
Rick |
El Pescador
Senior Member
Username: el_pescador
Post Number: 4625
Registered: 02-2006
| | Posted on Friday, July 10, 2009 - 05:37 am: |
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Ricardo, I'm afraid I cannot help on this one. Consider shooting an e-mail to Morten, somehow I think he may know the right answer. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3918
Registered: 04-2006
| | Posted on Friday, July 10, 2009 - 06:27 am: |
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If You by 'sliding sleeve' mean the cone, the brass one is to soft to handle the torque of the 460. It will be deformed and damaged rather quick. The problem is likely related to the shimming of the shift fork in the V-notch, and/or use of wrong type gear oil. Had some incidents when people hooked that engine to the old 290 drives, and it was a constant problem. They all went to Mercruiser after a while!
PS: Then they got new problems!!!! |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 382
Registered: 03-2009
| | Posted on Friday, July 10, 2009 - 07:51 am: |
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Thanks, Morten..... I should have included you in my "Ping".
The man's name is Wayne, and I'll ask him again what oil he has been using in it. It calls for GL 5.
Wayne did tell me that the shift shoe is free, but the sliding sleeve is stuck in the lower driven gear "cup"...... (in his case, the FWD gear).
And yes..... I agree that the brass sleeve may not take the torque...... but I do know of some 290's that have BB power in front of them and are working.
I guess my main concern is what do you do with the steel sleeve & cups when you need to correct this? I don't think these can be lapped as we could with the brass unit!
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Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3919
Registered: 04-2006
| | Posted on Friday, July 10, 2009 - 08:48 am: |
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GL 5 is one thing, but not all. Running anything but the Volvo Synthetic (Mobil 1?), You are in trouble on that combo. I always used the OMC Ultra HPF in the Volvo drives when combined with V8 and the diesel engines.
As for the Steel cone and coated cups, You have to check for damage of the coating. The coating itself I think is the same they use in break drums on lorries to make them handle the friction and heat. If damaged nothing to do but to change the gears. If ok, check the cone and shift fork. My guess might be that You will find a 'blued out' cone. In that case change the cone, check the shift stroke of the remote control at cable end, and fork adjustment. |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 390
Registered: 03-2009
| | Posted on Sunday, July 12, 2009 - 08:34 pm: |
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Slight update....
Wayne pulled the transmission and started taking it apart after a phone call to me.
The shift mech is out of the way and he says that the shift shoe is OK, and it looks as though the sliding sleeve is stuck in the lower gear cup.
That is as far as he got to date as he was not sure how the two driven gears came out.
I gave him some more instructions on how to remove the bearing box!
I expect to hear from him soon.
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