Pinion Gear preload

[johnbhite]

Ok, after reading manual #11 for setting the preload on the double bearing pack on the drive shaft, I tightened the nut down to where the washer barely touches the pinion gear, but my problem is that the rubber O ring wont allow the assembly to slide into the houseing so I can set the rolling torque... am I doing something wrong?? This is on a Bravo 2 by the way.

 

[Pete104]

Re: Pinion Gear preload

You set the rolling torque prior to installing driveshaft assembly.
What are you doing? Or trying to do?
#11 tells no lies!

 

[johnbhite]

Re: Pinion Gear preload

You set the rolling torque prior to installing driveshaft assembly.
What are you doing? Or trying to do?
#11 tells no lies!

I am setting the preload out of the drive housing on the bench, and then installing it in the housing to set the rolling torque. I thought that is what the book is stating. But after I get the preload set the O ring prevents the assembly from sliding in the housing.

 

[Don S]

Re: Pinion Gear preload

Did you put any lube (Oil not grease) on the oring?

 

[johnbhite]

Re: Pinion Gear preload

Did you put any lube (Oil not grease) on the oring?

yes, I coated it with gearlube

 

[johnbhite]

Re: Pinion Gear preload

Would it be a bad idea to tighten the retaining ring all the way and then proceed with my rolling torque setting

 

[Pete104]

Re: Pinion Gear preload

Whatever your doing, you need to seperate the bearing pack. They need to be free & slightly loose. Seperate in a press, like book shows. Then tighten nut until you get the pre-load spec. A little at a time.

If you have done this before, say on an older Alpha!? IT IS Not the same procedure!

 

[johnbhite]

Re: Pinion Gear preload

Ok, what I had here was a drive shaft change, I took the gear and bearing assembly of the old drive shaft and put it on the new drive shaft. I have followed the book as far as setting the preload and then installing the drive shaft in the upper housing to set the rolling torque spec. But what happens when I get the rolling torque spec right, the shaft will not come out of the drive housing, wont budge. This is my procedure so far,

1- On the bench, I tighten the nut and washer down just until the nut touches the washer

2- Place drive shaft assembly into drive housing, tighten spanner nut hand tight

3- Start to tighten the pinion gear nut in small increments until a rolling torque of 6 to 9 inch pounds is achieved

Is this correct, or am I completely off base here?

 

[Pete104]

Re: Pinion Gear preload

How do you know you have preload set properly? It has to be relaxed for reassembly! You can't just take the bearing & gear assembly and put it on the new driveshaft.
Setting the preload is done with the bearings seperated & pulled into position with the pinion nut. The o-ring is in place & will set in position while achieving the rolling torque.







I accidentally hit post before I should, sorry!

 

[Pete104]

Re: Pinion Gear preload

Page 3A-37 shows disassembly of the bearings. Just move it slightly. Then put the o-ring in place & then set preload. If you get it too tight, you MUST go thru this again!

 

[johnbhite]

Re: Pinion Gear preload

Alright, I think I may have found my problem. The drive shaft that was in the outdrive was the newer style meaning it has the different style U-joints. I had a different drive shaft out of an older drive that has the older style U-joints (the servicable ones). I think the problem is that I simply swapped the pinion gear and bearing assembly from the newer style drive shaft to the olderstyle drive shaft. The bearing assemblies have different part numbers between the two, So I am assumming that the physical characteristics are different. Does it sound like I am on the right track, and do any of you know what the differences are between the two bearing assemblies. Thanks a bunch

 

[Pete104]

Re: Pinion Gear preload

Definitly on the right track. There are a few different combinations of yokes & bearings.

IS why serial numbers are so important!!!!