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PTO Belt Change Problem

1289 Views 2 Replies 2 Participants Last post by  appel767
I am following the service manual procedure for replacing the PTO drive belt and have run into a huge hurdle. I have removed all necessary hoses, etc. including the 2 mounting bolts for the hydrostatic pump, next step is removing the pump from the bell housing of the motor but my pump will not budge even thousandths of an inch in any direction. Have tried soaking the mounting flange perimeter with various penetrating oils both inside and outside of the bell housing over a 2 week period, pry bars, built a plate to bolt on in place of the command lever mounting plate and even with a 4 foot long pry bar can not get the pump to rotate or move in any direction.

Is there a hidden bolt, access to the pump drive coupling or anything else that needs to be removed or loosened to allow the hydro-pump to be removed once the 2 mounting bolts are out?

Any other advice on replacing the PTO drive belt on the Brutus / 3650?

Thank you in advance!

Old Fart
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I need to replace my belt as well. Did you ever figure this out? Thanks!
I need to replace my belt as well. Did you ever figure this out? Thanks!
For anyone else looking to do this job, it's not a quick one. I had a rather mechanically inclined employee of mine do the job and it took about 7-8 hours. However, we concluded a 2nd time would take maybe only 3-4 hrs. TO CHANGE A BELT! Thank you Polaris. There are only 2 bolts that hold the pump in place. You should be able to pry it away from the bell housing. Then there is a gear attached to the pump that we removed by removing a large set screw. If one person pulls and angles the pump from the outside standing near the wheel, the other person can finagle the gear out of the bell housing without removing any hoses etc. Then take out all 8 bolts holding the bell housing on and the 1 engine mount/bell housing mount. Then you can pry the housing away enough to get the new belt on. Removal of everything the 1sst time is around 4-6 hours. Then putting it all back is only about an hour. One thing to remember is that when the gear goes back on the pump, there needs to be a small gap between the pump and gear to allow the gear to spin freely. It's a little tricky getting the gear back on the pump without 2 people, one to hold the pump out. And then getting the gear back into the housing and meshed with the other gears. You'll know if it's lined up if it slides in, if not, give the gear a tiny turn and try again. That's about all the advice I have. It's doable, just not fun or fast. Disappointing it's so tedious. A common wear item shouldn't be that way.
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