As stated above, before employing any attachments or implements, always browse, understand and follow the manufacturer’s safety manual.
Only use equipment that is in good repair. Ensure that all guards or shields are in place and operational.
Guards around the energy take-off shafts, gear package and other rotating/spinning products are very important.
Lower hydraulics.
Shut off the tractor engine.
Apply tractor parking brake.
Hitch tractor to implement.
Make sure that universal joints will be in the correct phase when connecting the shaft.
Usually do not wear loose attire. Tie back long hair. Do not dress in shoe laces dangling.
Stand away from moving or rotating tools. Where possible, function from the tractor chair, and have bystanders always be at least 6 metres (20 feet) away.
Do not take out shields from the PTO shaft.
Make sure that the PTO spinner/Power Take Off Shaft essential shields rotate freely.
Use the correct size travel for the device being powered.
Match the correct PTO rate for the machine being 
used.
Do not stage over a rotating shaft. Also PTO shafts with guards happen to be dangerous. Walk around the gear.
Know how to end the tractor, engine and attachment quickly in case of emergency.
Follow shutdown methods and wait for almost all moving parts to stop before moving away from the tractor or approaching the attachment.
Disconnect PTO when not in use.
“Power Take Off” (PTO) is a term used to describe the procedure of transmitting power in one point to another.A PTO shaft, for example, is a cylindrical steel rod that attaches to a electrical power source, like a tractor, at one end and an attachment, like a brush hog mower, at the other. When the tractor’s engine is normally running, power flows along the shaft. The shaft rotates at engine speed, transferring strength from the engine to the attachment.
When attaching or detaching PTO-driven equipment:
PTO was developed mainly through the ingenuity of farmers. In the past, power take-off applied belt drives, travel shaft attachments and pneumatics like bleed oxygen, but a geared tranny is more common today.
Power Take-Off injuries are very common about a farm. According to the National Agricultural Safety Database, most PTO mishaps occur when apparel and/or limbs are entangled in the rotating PTO shaft.