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#1
07-30-2019, 07:43 AM
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Mower deck spindle grease seals
I'm replacing the outer spindle shaft on my 50C mower deck. For a few days I tried removing the old rusted pulley from the ST-745 shaft without success. I've got to mow the lawn, so I put aside the old spindle shaft for another day and ordered a new style spindle shaft assembly (759-3479) with the accessible roller bearings, cones, etc. from one of our forum sponsors.
The grease seal installation is confusing as I have two Cub Cadet instruction sheets (CC-132 and CC-169) which contradict each other. The CC-132 instructions say and show the open side of the seal facing upward of the bearing. In other words the closed side of the seal is towards the bearing. The CC-169 instructions say the seal lip (the open side) is facing towards the bearing. Maybe the CC-132 is for use with the sealed type (water pump style?) spindle bearing, and the CC-169 is for the newer spindle bearings with the accessible bearings, cones, etc.? Any suggestions? 
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#2
07-30-2019, 08:26 AM
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Normally, one would put in seals so the lips retain grease inside.
BUT since we have grease fittings in the shaft, if we did that and began greasing, one of the seals would be forced out, usually ruining it. so install one seal "upside down" so while greasing, any excess will harmlessly work out around the seal. Some prefer to do the bottom seal inverted, others do the top so they can see the grease coming out while greasing.(if the belt guard if off)
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#3
07-30-2019, 08:45 AM
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Now on removing your drive pulley from the shaft
for rebuild of your spare assy. support the housing (usually mounted on the deck) Drive the shaft through the housing, from the bottom.(being careful not to damage the nut threads if reusing the shaft) A soft brass or aluminum drift helps. it will come out of the housing with pulley,seal and usually the top bearing. wash it up so you see what you have. then you can put it in a vice and impact off the pulley nut. Then you can support the shaft in a press with or without the top bearing, and push the shaft through the pulley from the top eliminating any damage to the pulley. 
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
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