Tractor Safety Guide: Safety from Points of Hazard on Tractors

1. Pinch Points:
Points like belt drives, chain drives, gear drives, and feed rolls.
Operators must avoid contact with hands or clothing in pinch point areas, when shields cannot be provided.
Never attempt to service or unclog a machine while it is operating or the engine is running

2. Pull-In Points:
Pull-In Points include feed rolls, grinders, and forage harvesters. Never attempt to hand-feed materials into moving feed rollers.
Always stop the equipment before attempting to remove an item that has plugged a roller or that has become wrapped around a rotating shaft.

3. Thrown Objects
Thrown Objects include rocks, stones, sticks, and pieces of chopped or cut crops.
Always keep shields in place, and wear PPE when working around equipment producing debris or this nature.

4. Wrap Points
Rotating PTO and other shafts (e.g. joints, couplings, shaft ends and crank shafts).
Watch components on rotating shafts, such as couplers, universal joints, keys, keyways, pins, or other fastening devices.
Splined, square, and hexagonal shafts are usually more dangerous than round shafts because the edges tend to grab fingers or clothing more easily than a round shaft, but round shafts may not be smooth and can also grab quickly.

5. Shear Points
These points include sickle bar mowers, rotary shredders, and cutters, cutter heads of forage harvesters, augers in tubes, chain and paddle conveyors, and certain points in an implement frame during raising or lowering, and rotary mower blades.

6. Crush Points
Points include four-wheel drive tractor with articulating steering which pivots in the middle, working under a raised heavy object like a combine head, hitches, telescoping shafts, hoods, and doors.

Source:http://www.ehs.iastate.edu/