DTY 4000 tractor dies when engaging pto, new

Question edited for clarity.

First check the belt routing.

https://www.google.com/search?q=craftsman+yts4500+belt+routing+diagram

And PTO issues

https://www.google.com/search?q=craftsman+yts4500+PTO+does+not+engage

..

Craftsman Garden Tractor 917.28746 Engine shuts off when ...

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Craftsman Garden Tractor 917.28746 Engine shuts off when engaging mower deck. 917.28746 ... Then start the tractor and pull the pto button out. If the engine ...

Why does my engine die when the blade is engaged ... - iFixit

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iFixitI have an older Murray riding lawn mower, whenever I engage the mower the engine dies, otherwise it runs .... My dr feild brush mower ... cuts off when I engage theblades. ... My Huskee only shut off once I put it in drive with the blade engage.

Riding Lawn Mower Problem - Dies when PTO engaged - GardenWeb

forums2.gardenweb.com > Garden Forums > Tractors

Apr 28, 2008 - When I pull the switch to engage the PTO, the engine bogs down real ...off I can keep the engine running with the mower engaged then it is fine ... Riding mower cuts out
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bad safty switch or shorting pto if pto replace it but i think one of your safty switches is bad

Sounds like a problem with the governor. Start it up. Don't engage the blades. Drive to a hill. Idle all the way down. Try driving up the hill. The motor should pick up when it slows while pulling up the hill. If it doesn't, the governor isn't working right.

check the "kill switch" they are usually located in the seating area. it senses for pressure or seat angle and will kill the mower if nobody is sitting on the mower. Good Luck

sounds like the safety switch is out of adjustment

Does engaging the pedal for the PTO lug the engine down, or does it just die like turning off the key?
If it lugs the engine down, then you need to make sure you can spin the spindle and idler pulleys by pulling the belt by hand. You should be able to slip it around the engine pulley enough with the blade pedal disengaged. Pull the belt up tight so the slack is around the engine pulley and try to spin the blade spindle and idler pulleys.
If it dies like turning off the key, then its likely a safety switch and may require a meter to test which.

The seat switch is has a shunt in the circuit that must be satisfied in order for the rest of the circuit to be happy. Make sure the connections are good, the pins inside the amp connectors will sometimes spread, push out of the lock etc. and if connection is lost will not work. Otherwise a new seat switch will be needed. You might check the PTO switch for continuity, without a diagram or schematic I am not sure how your circuit is wired. you have to have the parking brake engaged to get off the mower while the engine is running and the PTO is Dis-engaged?
I don't know if your "go" pedal eliminated this switch or not. But if with the parking brake engaged and the PTO disengaged, you lift off the seat and it dies, then its the seat switch.

Hope this helped Tim

pto is going bad

There is somthing in the PTO that is binding up. I am assuming the PTO is for the mower blades. The belt(s) could be binding up, not on the pulleys, etc. The blades should turn by hand easily.

Check and adjust your RIO switch{reverse implement option}near the trans if so equipped.What happens when you press forward pedal then engage blades?Would also check the lower bearing on your pto clutch to see if its seized up.