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  #1  
Old 04-06-2015, 07:13 AM
782Smoker 782Smoker is offline
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Default 50C rebuild
I am rebuilding the deck off my 782D and was wondering if anyone has put a smaller pulley on the center spindle to speed up the tip speed? Do I need to replace both the pulleys or can I get the top one off by itself? I have seen this done on the 44 inch decks but not with the 5/8" belt. Any help is much appreciated!
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  #2  
Old 04-06-2015, 08:34 AM
R Bedell R Bedell is offline
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Quote:
smaller pulley on the center spindle to speed up the tip speed? Do I need to replace both the pulleys or can I get the top one off by itself?
I am unaware of a "speedup pulley" for the 50C mower deck. I am also quite sure, the center pulley is considered a double pulley (one stacked on top of the other) and is an assembly.

IF.........one wanted to get more "tip speed", it would require custom engineering and fabrication.
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  #3  
Old 04-08-2015, 07:31 PM
mjsoldcub mjsoldcub is offline
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i did this to my 50" deck....it does have a stack pulley..i cut the old one off, bought a wdldable 4.5" pulley, turned the center out on a lathe until it was the same as the cylinder(spacer) and then fried it together...works great...i can take some pics if you want them...definitely get better blade speed...
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  #4  
Old 04-18-2015, 08:51 PM
782Smoker 782Smoker is offline
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If you could get pictures for me, that would be great!
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  #5  
Old 04-18-2015, 09:40 PM
mjsoldcub mjsoldcub is offline
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sure...the deck is hanging on the wall right now, but ill get it down and pop the cover off...do you have an extra stack pulley laying around??
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  #6  
Old 04-19-2015, 10:41 AM
ccpullin ccpullin is offline
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Back in the IH days they made a speed up pulley for the 44 & 50 decks. It was for the narrower 3V belts and took care of the cutting issues this deck had leaving swirl marks when turning. The only issue was that they did not make a shorter belt and it was at the end of adjustment when new. I had to purchase an aftermarket belt, but worked fine. I am not aware of a "speed up" pulley for the later "B" section 5/8" belt as used on the 50C. I had issues with a Haban 60" on a 2082 not mowing well so I went to a larger pulley on the engine clutch to solve the issue. I had to rivet a larger pulley from a later model on the clutch shoe and install a longer belt. If you go too small of pulley on the mower it will burn belts due to the lack of surface gripping area and it is hard to wrap a large belt around a small pulley and keep it tight. You are better off installing a larger pulley on the engine clutch.
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Old 04-20-2015, 08:41 AM
782Smoker 782Smoker is offline
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Originally Posted by mjsoldcub View Post
sure...the deck is hanging on the wall right now, but ill get it down and pop the cover off...do you have an extra stack pulley laying around??
I actually do, my dad has a 50C that he had under his diesel. That shell is pretty much rotten so I access to whatever I may need. Where did you find the pulley, and what size did you go with?
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  #8  
Old 04-22-2015, 07:41 AM
mjsoldcub mjsoldcub is offline
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i got the weld "a" pulley at the case ih dealer down the street.. i think its a 4" or may be a 4.5" but i think its a 4" i will check when i get it down... i would think that any farm and barn store would carry them...i used a hole saw to cut the original stack pulley apart..from the top...it was just bigger than the "spacer" in between the 2 pulleys... does that make sense??
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Old 04-22-2015, 08:27 AM
782Smoker 782Smoker is offline
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That makes sense! I think I am going to run a 4.5 inch pulley just for the safety and longevity of the bearings. I hate to have to put bearings in every few years.
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  #10  
Old 04-22-2015, 09:33 AM
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ol'George ol'George is offline
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That makes sense! I think I am going to run a 4.5 inch pulley just for the safety and longevity of the bearings. I hate to have to put bearings in every few years.
The bearings of the taper roller style don't wear out so much from speed or the lack of it, but more from
lack of lube/power washing/string/wire wound around the lower spindle cutting out the seals.
When replacing a seal I find it is advisable to install the upper seal with lip facing out/up so when greasing them with a grease gun, you don't force the seal out of it's housing, ruining them.
The grease will just expel around the upper seal.
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