105 engine power take off

steved · #1 04-18-2014, 06:27 PM

I need some more help with another problem on the 105. I'm trying to take off the drive pulley on the front of the engine. I've removed the two set screws that are accessed through the clearance holes on the stamped sheet metal piece. I've sprayed the set screw holes with PB blaster. Should the pulley come off now? My next thought is to rig a gear puller across the front of the frame and use that as the stationary point. I'm attaching two pictures. Thanks again for any help.

cubs-n-bxrs · #2 04-18-2014, 07:28 PM

There are 6 1/4-20 set screws in the white PTO pulley that need to be removed so you can get that part off first. Then when that is removed you will encounter a bearing with a lock collar that has to be removed and last but not least you can take off the starter/gen pulley.

Jeff in Pa · #3 04-18-2014, 08:04 PM

Quote:

Originally Posted by cubs-n-bxrs

There are 6 1/4-20 set screws in the white PTO pulley that need to be removed so you can get that part off first. Then when that is removed you will encounter a bearing with a lock collar that has to be removed and last but not least you can take off the starter/gen pulley.

The 1/4-20 set screws use a 1/8" allen / hex wrench. I highly recommend using a high quality wrench and make sure you are seated as deep as possible to reduce the chance of rounding off the set screws.

Once you get the PTO off, it will look like this. Remove the set screws on the PTO bearing collar and see the indent on the collar at about 11:00 ?

Use a punch to drive the eccentric to where the locking collar is loose. It can then be removed.

DoubleO7 · #4 04-18-2014, 09:07 PM

you can also "renew" the allen wrench by grinding the end off a bit so that your using new sharp hex material.

Also a good idea to turn the pto so that each set screw hole is up or at least at 10 & 2 so you can fill the holes with PB Blaster overnight.
Then do the third hole the next morning.

j elliff · #5 04-18-2014, 09:53 PM

Is everyone having pulley problems as of late. Geesh. Good luck with the removal. I just did mine and my only issue was a snap ring on the new bearing. Should u decide on a new bearing on reassembly, take snap ring out if it has one.
I've no idea if it was necessary but I also used anti seize on the set screws during reassembly

Good luck with it

steved · #6 04-19-2014, 10:33 AM

I've removed the three set screws from the pulley and sprayed the holes with PB blaster. I cannot get the pulley to come off. I've attached some pictures of how I'm using a crowbar with vice grips as the pivot point. Light taps with a hammer does not budge the pulley. Am I missing something else? Thanks for all your help.

Jeff in Pa · #7 04-19-2014, 10:47 AM

I have used a piece of hardwood against the V groove and tap from both sides to get it off.

Key word is "tap", not beat the snot out of it

DoubleO7 · #8 04-19-2014, 10:50 AM

If it was done the same as the factory did it, there are three more set screws down in the same holes.
The first set screw is short and blunt nosed.
That one is just used like a jam nut to the next set screw under it.
The next set screw is long and pointy nosed.

steved · #9 04-19-2014, 11:08 AM

Oh, I'll go check. I didn't realize there would be a second set screw.

steved · #10 04-19-2014, 12:01 PM

That worked! The last three screws were holding the pulley on. My question now is a dumb one. How does it work? I was expecting something to move in and out that would somehow engage the engine shaft. Now that the pulley is off what should I be looking for that might need replacing? The bearing seems fine. The three screws with the springs and jamb nuts, anything to check on them? Not sure what the springs do. Thanks again!