track replacement----- drive shaft install

fourbarrel

fourbarrel

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St George,New Brunswick,Canada
Ok this is more of a tech question but I can't seem to post in that section so here goes.When you guys put the drive axle back in do you tighten everything up on the chaincase side first and then do the bearing set screws on the pto side?Do you install the gears and chain and torque everything down first?
I am trying to trace down a persistent rumble in the drive line of my 01 SRX and it feels like it coming from the pto side of the axle;I changed the bearing twice with new ones each time and it's still there.When I put the new track in this winter I did what I said above,put the axle in place,put the bearing on the shaft but left it loose and then assembled the chaincase side with the gears and chain and tightened everything down.Then I made sure the bearing was on the axle as far as I could get it and tightened the set screws up.This rumble is driving me crazy,at first I thought it was just the new track but I've got about 300 miles or so on it now so I doubt that's it.

Would a jackshaft bearing rumble enough to send the vibration down into the chassis to the point that it feels like it's in the axle?That's the only bearing I never replaced when I had this sled apart,not sure why because I have a spare :o| but I didn't so now I'm chasing a rumble.
 
I'm 99% sure it's not the track as it's only a 1" Camo Carve and there's no studs in it yet either.The only other thing I forgot to put in my original post was that I has a bud press the drivers off and turn them around so the virgin side was catching the lugs,BUT he forgot to turn one of the outer drivers and pressed it back on the original way.I have my doubts if that's whats causing the rumble because it has the familiar bad bearing kind of feel.

I'm just wondering if I somehow got the axle pulled too far into the chaincase by tightening the gears all up first?
 
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Are there any rub marks on the track from the exchanger guards? If so notch away because that is probably the culprit.
 
fourbarrel said:
... BUT he forgot to turn one of the outer drivers and pressed it back on the original way....
Click to expand...
Tell me if I'm thinking about this right: wouldn't he have to swap the outer drivers end for end in order to "turn them around", as they only have drive cogs on one side.

So, if he did in fact turn one around right where it was, how did he position it on the axle? If he still has the drive cogs lining up with the track lugs, then I think the round "disk" part of the driver is now riding on the track clips? If so, that may not sound very good.
 
I'm with 700c sounds like one is in backwards, if all were turned around. I would lift the back of the sled up and get my face right in the track with a light left side and right side and try to see if the track lugs are rubbing, if they all have abit of clearance then change out that jackshaft bearing. Also check the clearance on the 6 boggie wheels and your 3 back axel wheels.
 
you need to clip the track 1/4 inch for starters.

also, if your drivers are off even a 1/6, they can hit on the edges of the lug

tighten the chain case stuff first, then install and tighten the skid. adjust your track, run engine, spin everything good so the bearing finds its neutral load on the shaft, then tighten.
same with the jack shaft and yes, a rumbly bearing there will feel it in your left foot
 
srx700c said:
Tell me if I'm thinking about this right: wouldn't he have to swap the outer drivers end for end in order to "turn them around", as they only have drive cogs on one side.

So, if he did in fact turn one around right where it was, how did he position it on the axle? If he still has the drive cogs lining up with the track lugs, then I think the round "disk" part of the driver is now riding on the track clips? If so, that may not sound very good.
Click to expand...
Now that I think about it it is one of the inner drivers not an outer one.I'll have another look at the track to check for rub marks but I'd say from all the replies that's where my noise is coming from.
 
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