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  #1  
Old 07-08-2019, 05:02 PM
cory1982 cory1982 is offline
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Join Date: Dec 2018
Location: AL
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Default 129 Cub 42" 3 blade deck

My 129 has the 42" 3 blade deck on it and it's in pretty good condition, no holes or damage, etc... I sharpened the blades put all new belts on PTO and mule. I also made sure the bearings were free and filled them with the Lucas Green Ag grease. When I mow it just seems to spit all the grease out and the deck sounds very loud. Are the spindle bearings bad? If so, how do I find out what the bearing size is without tearing it apart. I've checked the parts lookup but they only show the spindle as a whole assembly. Any help is much appreciated.
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Old 07-08-2019, 08:45 PM
mortten mortten is offline
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That deck would use what they call a water pump bearing. It is non repairable. St745 is the part number.
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Dad's 122 w/42" cast deck, spring assist, lights,weights, rear lift
1250 w/hydraulic lift, lights,weights, spring assist.
50C deck converted to an A with front wheels
44C deck converted to an A with front wheels.
QA-36A
42" blade
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  #3  
Old 07-09-2019, 01:33 PM
dodge trucker dodge trucker is offline
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This is a triangle deck, right? I didn't think they took the same bearings as the 44/50 decks, 745 is right for those
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  #4  
Old 07-09-2019, 01:39 PM
cory1982 cory1982 is offline
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It is a triangle deck. Thanks for the info!! Anything else I should replace while i'm in there replacing the spindle bearings?
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  #5  
Old 07-09-2019, 02:19 PM
R Bedell R Bedell is offline
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Quote:
I didn't think they took the same bearings as the 44/50 decks,
I would agree. Maybe someone changed the OEM spindles to something newer.
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Old 07-09-2019, 09:50 PM
mortten mortten is offline
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My bad. Cub Cadet parts lookup says that deck from 1971 to 1974 takes an St721, not an ST 745. The ST721 is no longer made and you must convert to the new style spindles.
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Doug

Dad's 122 w/42" cast deck, spring assist, lights,weights, rear lift
1250 w/hydraulic lift, lights,weights, spring assist.
50C deck converted to an A with front wheels
44C deck converted to an A with front wheels.
QA-36A
42" blade
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  #7  
Old 07-10-2019, 10:36 AM
cory1982 cory1982 is offline
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Quote:
Originally Posted by mortten View Post
My bad. Cub Cadet parts lookup says that deck from 1971 to 1974 takes an St721, not an ST 745. The ST721 is no longer made and you must convert to the new style spindles.
Is there some sort of write-up on how to do this conversion? Part numbers, etc...
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  #8  
Old 07-11-2019, 08:07 PM
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darkminion_17 darkminion_17 is offline
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I have yet to see a triangle deck with st bearings on it. I am sure you can go with the newer aluminum housing type on that deck, or go back to the cast iron ones as you can rebuild them...
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Old 07-12-2019, 08:43 AM
mortten mortten is offline
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So is the look up wrong? Newer triangle decks never had water pump bearings?
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Doug

Dad's 122 w/42" cast deck, spring assist, lights,weights, rear lift
1250 w/hydraulic lift, lights,weights, spring assist.
50C deck converted to an A with front wheels
44C deck converted to an A with front wheels.
QA-36A
42" blade
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  #10  
Old 07-12-2019, 08:22 PM
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darkminion_17 darkminion_17 is offline
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They did I just never seen one from all the ones I have had.
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