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Bus Driver's Cub 22 mower drive pulley

How to fix them and how to use them.
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Bigdog
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Bus Driver's Cub 22 mower drive pulley

Postby Bigdog » Tue Aug 05, 2008 7:15 pm

The following is a quick synopsis of Bus Driver's home made drive pulley for the cub 22 mower. The details of fabrication are general in description but I'm sure he will add more as time allows:

(quoting Bus Driver)
Questions continue about non-stock pulleys for the #22 mower. I made this using a Woods #1506 Hub and two pulleys BK40H for the 4" size. The BK40H is a Browning number, Grainger sells them. For a price much lees than the Browning, jackssmallengines.com in Maryland sells a pulley with that number, made in China, steel pulley, the Browning is cast iron. Same part number, Jack's brand of pulley is SST and seems to be well made. Jack's communicates poorly, is often very slow to ship, charges against your card quickly even if they ship slowly.
The spacer between the pulleys is 3/8" thick. The spacer must have a center hole SLIGHTLY larger than the bushing hole in the pulley.
I used four 5/16" bolts to hold the assembly together. Placement of the bolts must be done carefully as the available space really limits bolt size and placement. A lathe is amost mandatory for fabricating a quality assembly.
The Woods bushing flange is toward the tractor and that bushing must not project beyond the end of the PTO shaft. Shorter than standard bolts might be required for bushing removal. Anyone working on one of these will eventually understand my comments above. This still is not a low-cost pulley and it does take some time to fabricate.
The 4 1/2" size would use pulley #BK47H.

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Great job Bus Driver!
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!

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Bus Driver
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Re: Bus Driver's Cub 22 mower drive pulley

Postby Bus Driver » Wed Nov 26, 2008 10:22 pm

In earlier posts, forum members have posted that the #22 mower uses a B42 belt for the 4" pulley and a B43 belt for the 4 1/2" pulley. Being a "tightwad supreme", I found the 5L450 belt has the (apparently) same specifications as the B42 but at a lower price. When installed, the 5L450 was just too short for my mower and the shop-fabricated pulley. So now I have a 5L460 and it works well. So perhaps the 5L and the B series belts have differences that are not apparent in the published specifications. My pulley is virtually identical in diameter and width to the original PTO pulley.
Luck favors those who are prepared


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