Mule Drive Pulley Broken

[Hayden 2]

Hello, 

 

Had a pulley in my Mule Drive self disassemble. I have a 520H and looked in the parts manual and the Mule Drive isn't in there, my mower deck PN is either "C560SC01" OR "10525" which I was also unable to find a parts manual for.

 

I would imagine I need to replace the shaft, as the race is pretty marred. The pulley itself doesn't seem to have damage but if I'm buying everything I might as well replace it.

 

A secondary question would be why it broke. I have noticed that my PTO will kick off while mowing a lot, especially when mowing in taller grass too fast. So I just turned in the PTO adjustment a turn (maybe every other week this year) until this broke this weak. What would be a good way to get the PTO adjustment and Mule adjustment where I'm aligned and tightened properly?

 

Thanks for the help.

[953 nut 67,503]

One of the best features about Wheel Horse is interchangeability of implements and attachments. The manual below has the parts listed individually but yours appears to need a complete replacement. The mule drive on your 1990 60" mower is the same as other dives.

Place a Wanted ad in our classified section for a mule drive. 

https://www.wheelhorseforum.com/classifieds/wanted/

 

[Ed Kennell 46,621]

The spring loaded mule drives used on the 520 are not as common as the regular mule drives.   You can place an ad in our classified wanted section or contact A to Z tractor parts

[JoeM 10,101]

I would venture to say you had a bearing going bad and dragging the belt. 

The shaft should be okay as long as you can get the old race off. just clean up the burs so the new pulley slides on.

 

Edited July 23 by JoeM

[peter lena 9,952]

@Hayden   glairing to me ?  again , lubrication  load stress failure , those 6203 bearings with  wide rubber seal access , is literally showing you the way  , small flat  pocket screwdriver or  small flat putty knife , carefully  pop out seals  , both sides , wipe out and carb cleaner flush , repack with  lucas  xtra hd green chassis grease ? 550 degree flash point , polyurea rated (  anti sling )  stays with bearing , what a concept !  also have this on my set up on 3  horses , EVERY RELATED MOVEMENT  POINT  , MOVES WITH TOTAL EASE , no frayed belts , no whyining  bearings , never burned out a clutch disc ,2 basic stages ?  insure functional  detailing , and  lucas green chassis grease , every spindle , and pulley , clean out every bearing / carb cleaner flush , no cross contamination , of original  lube . this does not fail , have this in regular use for years , bTW  , that pto lever set up is a GOLD MINE , for  functional / easy  lever start  . love repetitive problems ?  they show you the way to change .  like a heim joint , pete

 

[Hayden 2]

Got the new pulley in and installed and this just doesn't look right to me. Any ideas on what it could be? The belt is on the inner pto track. 

[8ntruck 9,071]

Looks like you have the bracket and shaft (#5 in the parts diagram) about 180 degrees out of position.  The way I read the parts diagram, the outer pulley should be ahead of the inner pulley when installed on the tractor.  Your picture shows that it is behind the inner pulley.

 

Disclaimer: I do not own a 520H nor have I worked on one.  I'm sure somebody with direct knowledge of a 520H will be along with comments.

[Ed Kennell 46,621]

I

37 minutes ago, 8ntruck said:

180 degrees out of position. 

Yeah that, but what fixes the position of the shaft?   I am not seeing it on the schematic.

[Hayden 2]

1 hour ago, 8ntruck said:

Looks like you have the bracket and shaft (#5 in the parts diagram) about 180 degrees out of position.  The way I read the parts diagram, the outer pulley should be ahead of the inner pulley when installed on the tractor.  Your picture shows that it is behind the inner pulley.

 

Disclaimer: I do not own a 520H nor have I worked on one.  I'm sure somebody with direct knowledge of a 520H will be along with comments.

That was exactly the problem. 

 

Too bad the PTO will still not stay engaged.

 

 

[8ntruck 9,071]

41 minutes ago, Ed Kennell said:

I

Yeah that, but what fixes the position of the shaft?   I am not seeing it on the schematic.

Gooood question.  See my disclaimer above. 

[Ed Kennell 46,621]

13 minutes ago, 8ntruck said:

See my disclaimer above

I don't have one either.    I'm guessing the shaft may have a square end that indexes in a square hole in the housing?   

 

26 minutes ago, Hayden said:

PTO will still not stay engaged.

Is it slipping or is the engagement lever not staying cammed over?

[Ed Kennell 46,621]

1 hour ago, Ed Kennell said:

I

Yeah that, but what fixes the position of the shaft?   I am not seeing it on the schematic.

I think i see it now.   Looks like the guide block #11 and bracket #12 attach to a tapped hole in the shaft.   The hole is hidden by the belt on the schematic.