Mechanical drive radiator fan free play

[luvrbus]

The ones I have seen have a isolator between the fan and the hub,I tried to order that isolator from Luke for Mikey engine swap   

[HoBoJo Busman]

     Well here you go folks.
This is what I consider to be a #2 out of 10...
1 being horrible & 10 being the better end.
I paid $250 for this last year and returned it when
I compared it to the one presently on the engine in my 4108 Buffalo.
The one on the bus presently, I would rate a #8 or 9
so I will keep it for a few more miles
You all decide and do let me know what you think will you?

[luvrbus]

     Well here you go folks.
This is what I consider to be a #2 out of 10...
1 being horrible & 10 being the better end.
I paid $250 for this last year and returned it when
I compared it to the one presently on the engine in my 4108 Buffalo.
The one on the bus presently, I would rate a #8 or 9
so I will keep it for a few more miles
You all decide and do let me know what you think will you?

yep that was missing on Mikeys engine and the Utahclaimjumber tried to have one made

[chessie4905]

Out near the end the illustration shows black area with slashes. Probably the rubber you have. They list two fan hubs. One for 4108 and one for 4905. May be for amount of blades on fan. They use 8 and 6. The breakdown on the fluid fan doesnt show any rubber. Fluid may handle any shock. Fortunately, my driving coach has a fluid fan with varatherm  removed with full time fan.

[richard5933]

If I understand how that's put together, the inner metal sleeve is connected to the mechanical drive's output shaft, and the outer metal sleeve connects to the flange where the fan mounts. The only thing holding the two sleeves together is that rubber layer in between.

Do I have this right?

[luvrbus]

If I understand how that's put together, the inner metal sleeve is connected to the mechanical drive's output shaft, and the outer metal sleeve connects to the flange where the fan mounts. The only thing holding the two sleeves together is that rubber layer in between.

Do I have this right?

It is a bonded rubber inner holding the 2 pieces together that is also  AKA as a PTO coupling 

[HoBoJo Busman]

Richard,
  If you have it right here...
All I wanna know is ...
  Where oh where can I get us all new ones?!

[richard5933]

Richard,
  If you have it right here...
All I wanna know is ...
  Where oh where can I get us all new ones?!

Why do we need new ones?

[HoBoJo Busman]

Well I for one,
Enjoy having spare parts on hand and replacing parts that are ready to fail,
(not that this particular piece is just yet, on the verge of catostrophic failure)
   instead of waiting till something has me on the side of the road.
  It's just my weird way of enjoying peace of mind in my own little head.
    Maybe thats why I'm broke. I'm spare parts broke.

[chessie4905]

get a bad one, seperate the two pieces. clean and glass bead blast. buy liquid polyurethane-rubber two part kit on Amazon. make a rigid setup to hold so inner piece
is perfectly centered. pour in liquid.
read questions and answers. also check reviews.

[luvrbus]

get a bad one, seperate the two pieces. clean and glass bead blast. buy liquid polyurethane-rubber two part kit on Amazon. make a rigid setup to hold so inner piece
is perfectly centered. pour in liquid.
read questions and answers. also check reviews.

I couldn't separate the 2 pieces with a 20,000 lb press some military 8v92 have a coupling similar   

[chessie4905]

probably need to drill or burr out the rubber or burn it out under controlled heat so as not to hurt the metal. Put it in the wifes self cleaning oven.

[HoBoJo Busman]

   ie;    I couldn't separate the 2 pieces with a 20,000 lb press.

I am thinking then, that we will keep it as it is then.   Thank you

[chessie4905]

All the years on the forums, haven't heard of one failing on a Buffalo. Wonder what percentage actually have mechanical fans.