Can anyone identify this? please

[Colinl]

Hi everyone

I have just bought a second-hand engine and it came with this coupling(Aquadrive like). The rubber gasket is open and I would like to get it serviced. So knowing the make it will help me find someone that is able to service it.
http://www.iol.ie/~colinl/drive/

Thanks in advance


Colin

 

[duncanmack]

Hi Colinl,
I can't identify the make, BUT I do know what it is. It's a constant velocity joint siimilar to what's found on FWD cars.

Find out from your local small garage who local to you services c/v joints and take it there. They'll identify it, will have the bits and the expertise to service and repair it.

If your local garage can't/won't tell you then ask around/use the yellow pages - tho many of the folks who do it don't have any need of paid advertising. I could point you at several in the W of Scotland.

I have some contacts in Ulster. I'll ask them. There is bound to be at least one in the Dublin area.

Happy hunting!

 

[scottie]

gkn aqudrive halyard marine I think

 

[William_H]

Constant Velocity joints on cars can't be "serviced" they are replaced if they have too much play in the drive direction and other wise are maintenance free. That assumes that the rubber boot remains intact and the grease stays in.
They get drive from a balls rolling in curved tracks. The curved track allowing drive even with angular displacement. The track tends to wear in the centre where the shock of drive is mostly felt. This means that when the CV is driving at an angle (steering wheel turned in a car) the balls drop into the worn section of the track giving a characteristic clatter as the wheels rotate.
The wear can be so much in a car that the balls escape from the track and you have no drive.
A car axle gets a great deal of abuse especially in a manual gearbox every time you drop the clutch or decelerate it hammers the tracks.

By comparison I would suspect that a CV in a boat drive would get almost no wear with little shock loading. Also if there is any angular displacement this would stretch the wear damage over a larger area.

So to test the CV for wear check for any free play between the input and output drive connections. You should not be able to detect any play but if there is it may still be fine.

The rubber boot is attached by stainless teel straps to clamp the rubber into a groove or you could use cable ties (I think). If the boot is damaged it is probably possible to find a car boot that will fit.
good luck I reckon you have an excellent device there. olewill
PS I have no experience wiuth CVs on boats.

 

[jfkal]

Halyard marine aquadrive

 

[Aja]

An example of a Halyard Marine Aquadrive:

Donald

 

[VicS]

[ QUOTE ]
The rubber boot is attached by stainless teel straps to clamp the rubber into a groove or you could use cable ties (I think). If the boot is damaged it is probably possible to find a car boot that will fit.


[/ QUOTE ] Yep quite normal to use cable ties BUT i dont think a car type boot will do in this case as all the car ones I have seen are a small diameter at one end where it fits around the shaft itself. They are all different anyway.

BTW I have never have had to replace any CV joint although I have had to replace the odd boot. (A garage even repaired a slightly damaged one in situ for me by gluing up a little cut with a heavy duty "Super Glue" .... has stood the test of time too)

 

[misterg]

Just to add to previous advice:

It looks like you would have to take one of the joints off the intermediate shaft to change the gaiter (if it needs it). I had to do the same thing with the CV joints on my VW camper a few times (this uses discrete CV joint units which look very similar to the Halyard ones, rather than proprietary driveshafts). The first time I did it, I was playing with the removed CV joint, waggling the centre around and marvelling at the engineering as the balls moved up and down the tracks in the housing, when the thing just fell apart. Suddenly I had the inner with 6 balls stuck in a cage around it in one hand, and an outer ring in the other! Then the balls all dropped on the floor!

It was a high stess moment, and it only got worse after I'd cleaned all the parts up and tried to get them to go back together - there seemed to be no way of getting everything back inside the outer ring - it was all just too big /forums/images/graemlins/blush.gif

After ages jiggling the middle, the balls and the cage around on the outer with a rising sense of anger at having been so silly to get into this position, just as suddenly, there was a click, and the whole lot fell back into place! Phew!

The moral of the story is that there is a particular angle for all the bits where the inner and outer parts of the CV joint can be slid apart. Normally the presence of the shaft through the centre stops the joint getting to this angle. If you ever *do* take the shaft out of the joint (e.g. to change the gaiter), don't waggle the middle too much!

Andy

 

[billskip]

I think identification has been confirmed by the other posters.

But I dont think it can be a standard CV, It must be a special design for marine use
because standard CV's as fitted to cars are (IMHO) not subjected to high "end thrust" and they dont like a lot of this.

To quote from "olewill" (whom I have great respect for ) Quote "a CV drive in a boat would get almost no wear with little shock loading" I feel I cant agree as there is heavy shock loading in the "end thrust" motion as the boat is put into Fwd or Rev gear trying to push the engine out of the front of the boat or pull it out of the blunt end.

To use a standard CV the thrust would have to be transmitted to the hull via a thrust bearing mounted on the prop shaft instead of the thrust being transmitted thro the gearbox-engine-engine mounts-hull...all IMHO

 

[rickp]

[ QUOTE ]
To use a standard CV the thrust would have to be transmitted to the hull via a thrust bearing mounted on the prop shaft instead of the thrust being transmitted thro the gearbox-engine-engine mounts-hull...all IMHO

[/ QUOTE ]

I think thats part of what the Aquadrive does - it transmits the thrust into a solid beam on the boat rather than through the engine mounts.

Rick

 

[billskip]

I agree with you Rick.

 

[srp]

[ QUOTE ]
I think thats part of what the Aquadrive does - it transmits the thrust into a solid beam on the boat rather than through the engine mounts.

Rick

[/ QUOTE ]
A picture of one installed here if I've done the link correctly.

Otherwise go to this page
Coincidentally, I've just emailed Halyard with a question about maintenance, and I'll post again if they have anything relevant to say.

 

[Colinl]

Thanks everyone for all the info, and Rick enjoyed your site. Thats all ahead of me.


Colin

 

[misterg]

[ QUOTE ]
But I dont think it can be a standard CV, It must be a special design for marine use because standard CV's as fitted to cars are (IMHO) not subjected to high "end thrust" and they dont like a lot of this.

[/ QUOTE ]

There is a separate thrust bearing, before the rearmost CV joint. Cars (AFAIK) don't usually use 'seperate' CV joints, but have proprietary drive-shafts which have the CV joint in them. My VW camper did use separate joints (made by GKN), which look very much like the Halyard ones (FWIW).

I agree about the need to avoid end thrust on the CV joints.

Andy