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#1
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Mower deck lock up
New here. model 3225, 50” deck, shaft drive:
While mowing lawn, the deck suddenly locked up and caused the belts to start smoking and shortly afterwards killed the engine, while I was trying to disengage the clutch. there was nothing in the blades or belts, by hand the mower deck spins freely, no grinding, no odd noises. checked PTO belts and everything moves freely. Unengaged engine runs strong. Engage clutch, immediately goes into lock down, slowing engine and starts to smell like burning belt, although not seeing smoke. wondering if the “Deck transmission” ? Can cause a problem like this. ? Box on deck that converts power from shaft drive to belt drive. Are there Other possibilities I’m overlooking? |
#2
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I am unfamiliar with your 3225, but from what you have described, it sounds like the PTO ("engine clutch") on the engine needs replaced. Probably around $150 or so for the part.
Cub Cadet 123
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#3
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Disconnect the drive shaft to the mower deck and see if you can turn it and if the blades turn freely. If that checks out then the next thing to look at is the shaft that runs through the front axel that the PTO belts are connected to. The shaft is the item circled in red.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL |
#4
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Quote:
1/ the deck locked up suddenly, and for no immediately apparent reason 2/ you were not able to disengage the PTO clutch quickly, which caused the belts to smoke and stall the engine. Again not familiar with that model, but to your question about the transmission on the deck, if everything else is free, I would be very suspicious of that transmission. Could something inside it be moving when power is applied that jams, causing it to jam and lock up? I'll sit back and watch now, I'm curious what solution you find. |
#5
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Check what Sam said. There is a grease fitting on the axle (#20) that may have got overlooked.
https://www.cubcadet.com/en_US/conte...0d87009d4452/y If that checks out okay then inspect the nylon flange bearings(#19) on the pto assembly. I had some that failed causing my belts to smoke. There should not be much movement in the assembly. https://www.cubcadet.com/en_US/conte...59d42274fbbf/y If all that checks out okay I would pull the cover off of the gearbox on the deck. I'm not sure which deck you have but if you stand it up so the cover is facing up you can suck the oil out and inspect the gears and see if there are any damaged teeth. I have had good luck using these fine belts. https://www.ebay.com/itm/11310623421...EAAOSwZupgEtPv Good luck and let us know how it goes.
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