oil in bellows

[Morgan320i]

so I had milky outdrive oil last week, so I pulled the drive pressure tested the drive and air was coming out of the universal joint seal, so I replaced the seal, and bellows and put it back together and it ran great, checked oil no water, i went out yesterday and on my way back i herd gimble bearing noise while turning, so i pulled the drive off today, and my bellows had about a half a quart of oil in it, and i pressure tested again my seal is leaking, how is this happening its new, and i never had oil in the bellows even with the old beat up one,

super frustrated, if i did the rolling torque wrong would it cause it to leak ? i did not replace any bearings or shims or anything or take it apart

 

[skydiveD30571]

Re: oil in bellows

How does your yoke and drive shaft look? The most common reason those seals fail is because of corrosion and rust build up on the yoke shaft. It then tears up the seal.

 

[Morgan320i]

Re: oil in bellows

there is some build up on the shaft, I got some wetsand and prepped the area it was pretty smooth and nice putting the new seal on

 

[bruceb58]

Re: oil in bellows

If you had milky oil and the seal that was leaking was the main drive shaft, you must have had water in your bellows at some time. When that happens, its usually a good idea to replace the u-joints. You don't say what drive you have but the gimbal bearing would also need to be replaced for an SX type drive.

 

[Morgan320i]

Re: oil in bellows

I have a Volvo dp-sm 1.95 duo prop

 

[bruceb58]

Re: oil in bellows

So, was there water in the bellows? Have you replaced the bellows?

 

[Morgan320i]

Re: oil in bellows

replaced gimble last year and bellows last week there was no water in the bellows or drive this time just oil

 

[bruceb58]

Re: oil in bellows

So assuming you had water in the bellows before(never answered my question), the shaft going into your drive is going to be questionable because of corrosion. If that is where its leaking again, you need a new seal and input shaft.

 

[Morgan320i]

Re: oil in bellows

milky oil in my drive would = water in my bellows

 

[bruceb58]

Re: oil in bellows

milky oil in my drive would = water in my bellows

I am sure its the likely culprit in this case but you have many seals that can allow water in your drive and make the oil milky. Not just the input shaft seal.