Gear Oil Leak - Possible Yoke Seal

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

Ok thanks, seems like a bearing separator will be the tool of choice to back it off slightly.

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

Yeah, that's the way I do them. Just slip the one closest to the unis off a little (only needs to be a few millimetres) and make sure the other one stays down with the gear, right on the shoulder....

Chris....

Can I use the aluminum bearing spacer/housing as the base surface to push against to slide the bearing off a little, or will it be too much force and possibly damage the spacer? This way I won't have to touch the bearing closest to the gear and can just press down on the center of the gear shaft using the flange of the spacer as my bearing surface.

 

[achris]

Re: Gear Oil Leak - Possible Yoke Seal

Can I use the aluminum bearing spacer/housing as the base surface to push against to slide the bearing off a little, or will it be too much force and possibly damage the spacer? This way I won't have to touch the bearing closest to the gear and can just press down on the center of the gear shaft using the flange of the spacer as my bearing surface.

View attachment 145810

Yes.

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

Checked my rolling torque prior to disassemble at the highest reading I had was about 2.5-3 in-lbs. I know the recommended for used bearings is 3-7.5 in-lbs, but since I didn't have any trouble with the bearings previously, is it safe to shoot for 3 in-lbs for the reassemble or should I go for the middle at 5 in-lbs?

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

Couple more questions:

Below is my yoke and the surface which the seal rides on. The seal and oring themselves were pretty hard so I know they weren't providing the right compression they needed to seal the drive. But take a look at my yoke seal surface. I cleaned it up with some emery cloth and you can notice some micro pitting. I can see where a groove may be starting to form but it's nothing that I can feel.

So question is, should I replace or install a speedi sleeve?

If I install a speedi sleeve is there one specific for this yoke that you guys...Chris....have used in the past? The O.D. of the seal surface is about 2.249 and the width is slightly under 7/16".

One additional question. I don't see it in the manual but I've read it in other posts that people recommended marking the drive gear and the driven gear to make sure they are mated back in the same gear tooth.....is that absolutely necessary?

Edit: I found an SKF brand, model 99227.......looks like it will work......anybody used this one?

 

[achris]

Re: Gear Oil Leak - Possible Yoke Seal

Couple more questions:

Below is my yoke and the surface which the seal rides on. The seal and oring themselves were pretty hard so I know they weren't providing the right compression they needed to seal the drive. But take a look at my yoke seal surface. I cleaned it up with some emery cloth and you can notice some micro pitting. I can see where a groove may be starting to form but it's nothing that I can feel.

So question is, should I replace or install a speedi sleeve?

I would speedi-sleeve..

If I install a speedi sleeve is there one specific for this yoke that you guys...Chris....have used in the past? The O.D. of the seal surface is about 2.249 and the width is slightly under 7/16".

Yes.

One additional question. I don't see it in the manual but I've read it in other posts that people recommended marking the drive gear and the driven gear to make sure they are mated back in the same gear tooth.....is that absolutely necessary?

No.

Edit: I found an SKF brand, model 99227.......looks like it will work......anybody used this one?

That's the one I use, and I've done a few dozen.... Never had a come-back. Just use a SMALL amount of sealer (like Loctite 518) on the inside of the sleeve.

Chris.....

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

Chris,
Got my speedi sleeve in today. Question for you. did you precut the sleeve to remove the radius side? The length of my sleeve is .448 and the yoke surface is .430, leaving me 0.018 extending passed the yoke surface. I can push that back down using the bearing inner race surface to get it flush, but then I still have some area of the speedi sleeve sitting on the chamfered edge of the yoke, which according to SKF is a no-no.

Just wondering what method you used.

Keith

 

[achris]

Re: Gear Oil Leak - Possible Yoke Seal

That radius is for the installation. Once the sleeve is on, you cut the radius part off. Then push the sleeve further to get it flush..

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

I just installed the sleeve and after setting it with a few good whacks, it ended up being flush with the surface. Have a look.

I pre-cut it just in case I needed to remove the installation ring. Should I worry about removing and risk damaging the sleeve or could I just leave the installation ring in place?

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

I cut the radius installtion sleeve off, wasn't as bad as what I thought it would be. Put everything back together and started checking the rolling torque after incrementally turning the lock nut. I noticed before I disassembled to repair that the bearing races were tight together like they should be so I made sure to back the yoke end bearing off a little before reassemble so the bearing races would move independent of one another. Initially without any tension on the bearings my rolling torque was already 2.5 in-lbs. So I slowly turned the nut and kept checking, still 2.5 in-lbs and the bearing races were still independent of one another. Then on one small adjustment of the nut I could feel the belleville washer getting tight on the nut, and then I could hear the bearings and races pop together and they were tight with one another. Checked the rolling torque then and I was at 5 in-lbs. Rechecked and rechecked and still at 5 in-lbs.

Am I good to go or should I give it another small incremental turn of the nut and recheck?

 

[kwoolard]

Re: Gear Oil Leak - Possible Yoke Seal

I rechecked the rolling torque again and it seemed to settle in around 3 in-lbs, so I tightened it up to 5 in-lbs. Slapped everything back together and pressure checked. Held 15 psi for a couple of hours so I installed the drive and filled with gear lube.

Ran it yesterday for a couple of hours at cruising speed. Everything seemed fine, no gear whining or bearing noise from the upper gear case. So far so good.

One question I have is how long does it take to get the air pocket out of the upper case? I filled the reservoir with oil and noticed after my trip yesterday the oil dropped about 1/4". I haven't removed the outdrive to see if oil is leaking into the bellows again because I assumed it was just the air pocket filling up with oil

 

[achris]

Re: Gear Oil Leak - Possible Yoke Seal

...One question I have is how long does it take to get the air pocket out of the upper case? I filled the reservoir with oil and noticed after my trip yesterday the oil dropped about 1/4". I haven't removed the outdrive to see if oil is leaking into the bellows again because I assumed it was just the air pocket filling up with oil

Yeah, it can take a while... I cheat... I fill the drive normally (before putting it on the boat), then lay it on the side with the vent screw up. Take the vent screw out and fill the cavity up with as much oil as I can get in there... That removes almost all the air... Then the monitor bottle never goes down.

Chris......