torque spec. on nose cone

[seadoo_mike]

after servicing my pump, I torqued down the 3 cone screws to the manual at 66 inch pounds, when I was doing so I was thinking that it seems like the screws are not stopping and seems to be getting to tight, then I finally made it to spec. and noticed that the holes on the plastic cone were mushroomed out and turned white it color, obviously this isn't good. I am going to buy another cone and install. I just want to make sure that I don't over tighten screws, is the manual right or do they just need to be snugged down. The thread on the screws do have lock on them.

On a side note, is there such a thing as too much grease in the nose cone that would do harm.

 

[pete63]

after servicing my pump, I torqued down the 3 cone screws to the manual at 66 inch pounds, when I was doing so I was thinking that it seems like the screws are not stopping and seems to be getting to tight, then I finally made it to spec. and noticed that the holes on the plastic cone were mushroomed out and turned white it color, obviously this isn't good. I am going to buy another cone and install. I just want to make sure that I don't over tighten screws, is the manual right or do they just need to be snugged down. The thread on the screws do have lock on them.

On a side note, is there such a thing as too much grease in the nose cone that would do harm.

just changed my impeller, cone bolt is 7.5 Nm (not sure in lb). i am pretty sure you cant have too much grease in there!! people complain about not enough.....
just make sure there grease on the shaft side of the bearing as well. check your torque wench calibration or settings?
there should be a ss washer under the hex head?

 

[seadoo_mike]

pete63, the 7.5Nm equals the 66 inlb, I did check my torque wrench against another and it matched up, I used the washers under the screws, but it was obviously too tight, not sure what happened there. did you use grease or oil in your cone. The manual says to put around 52ml of grease, but to me that just doesn't seem enough, so I was planning on filling up the whole cone with grease, and didn't know if too much grease would compromise the seal on the other side of the bearing do to maybe over pressurizing.

 

[pete63]

i was going to change over to oil but realised there must be a reason for seadoo spec for grease, so i stayed with grease. i havent had any dry bearing problems at all. any way the pump should be checked every year, so why not check the grease and bearing.
it is actual is more than 52cc of grease if you follow the manual. there also grease inside, shaft side and cone.
approx 56 - 60 cc.
not sure whats going on with your cone, i thought 7.5 Nm wasn't very much when tightening mine up...

 

[seadoo_mike]

are you saying that 56-60 cc is total for the job, how much did you put in? I think the manual is kind of fuzzy when it comes to that.

 

[pete63]

no i didnt measure, just say at least 52cc in the cone and top of the bearing, another 4cc at other side of the bearing and then just coating the bearing shaft and drive shaft.
you can see where the 52cc of grease is in the cone and bearing, look at the impeller side, 4cc here as well.