Quote: Originally Posted by big dog 900
thanks for the info . I will get things checked out rain hear down to grass sucks ,
Whats goin on????
I hate to tell you this, but your crank is coming apart and is out of spec, this is why it won't rev.
The crank is so far out of phase that at high rpm it is fighting itself
to rotate and the reason for lack of rpm and power.
One thing you need to keep in mind is that all of these 900's
have severe crank issues. I have seen many issues with these cranks
I had to take mine apart and sent it out to be trued and welded.
Spec is .001 to .0015 total runout.
My 03 was out .007 on the mag side and .014 on the
pto. That's right 14 thousandths. The pork cop was pulling out of the crank pin and
rubbing on the inside of the crankcase. My engine has
1400 miles on it and was bone stock. My buddy has a 03 900 with 800 miles on it. His was .0055 on the pto and .008 on the mag
You are looking for trouble if you don't get it trued and welded.
you can take it to a dealer and get it fixed, but Cat will not weld them. The 900 crank is a bad design and will twist out of phase in a couple hundred
miles after it is trued, if it is not welded. If you true it and weld it you will not have any more problems with it.
If you want to haul it over to Monroe, I can pop the clutch and the flywheel off and check it for you.