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UNIT 6

UNIT 6. Tractor Hitches PTO’s Hydraulics. www.precisiongps.com. Tractors are Powerful Machines. Get ‘er done!. Tractor Hook-Up Parts. Hydraulic Plugs. 3-Point Hook-Up. PTO Shaft. Drawbar. THE DRAWBAR. Designed to pull loads Adjust to the correct height to ensure safe towing

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UNIT 6

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  1. UNIT 6 Tractor Hitches PTO’s Hydraulics www.precisiongps.com

  2. Tractors are Powerful Machines Get ‘er done!

  3. Tractor Hook-Up Parts Hydraulic Plugs 3-Point Hook-Up PTO Shaft Drawbar

  4. THE DRAWBAR • Designed to pull loads • Adjust to the correct height to ensure safe towing • Position so the PTO shaft is straight http://www.four-h.purdue.edu/tractor_safety/

  5. 2 TYPES #1- Stationary • Extends backward or forward • Two or three positions possible with pin movement • Must be adjusted to PTO http://www.four-h.purdue.edu/tractor_safety/

  6. 2 TYPES continued #2- Swinging • Swings in direction tractor turns. • Must be secured in fixed position to travel on the road or when using PTO. • Can be locked in position to be used as a fixed type. http://www.four-h.purdue.edu/tractor_safety/

  7. Drawbar Safety • Must adjust for PTO use • ONLY attach to drawbar, 2-point, or 3-point hitch if pulling load (Never to any other part). • Raising height of bar excessively can cause overturn http://www.four-h.purdue.edu/tractor_safety/

  8. Proper Hitching Procedures: • Back tractor slowly into place. • Place tractor into neutral and engage brake before dismounting. • Connect directly behind tractor. • Use lynch pin or hitch pin for locking, along w/ cotter pin or clip. • Always hitch your own tractor. Hitch Pin www.johnnyproducts.com Lynch Pin www.hollywoodracks.com

  9. THREE POINT HITCH PARTS: Top Link Two Lower Draft Links http://www.four-h.purdue.edu/tractor_safety/

  10. Benefits of 3-Point Hitch • Easy adjustment of load with control levers. • Level implement laterally. • Adjust implement pitch. • Most hitches equipped with sway blocks to restrict side-to-side motion.

  11. Hitching Safety • NEVER work under a raised implement. • NEVER depend on a hydraulic valve for your safety. • Place supports under implement. • Stop and shut down tractor before performing maintenance. • Be aware of location of others.

  12. How many different categories of Three-Point hitches are there? • Difference between categories is by size. CategoryMax. Drawbar Power I 20-45 hp II 40-100 hp III 80-225 hp IV 180-400 hp (This is on the test…)

  13. Quick Attachment Couplers • Used for fast connection and release of implements. • Make sure you hook hitch pins uniformly. • Check coupler for proper locking, cracks and wear.

  14. Power Take-Off (PTO) www.acs.aone.net

  15. 3 Types: • Continuous Running - operates when master clutch is engaged • Independent - transmission and PTO powered through separate clutches -PTO will still run when tractor is stopped or in motion • Transmission Driven - PTO runs only when tractor is in motion

  16. PTO & Drawbar Height Requirements Type PTO Speed Shaft Size #Teeth Height on PTO Continuous 540 r.p.m. 1 3/8” 6 14”* Independent 1000 r.p.m. 1 3/8” 21 16”* Transmission 1000 r.p.m. 1 ¾” 20 20”* *+/- 2”

  17. PTO Safety • Many accidents occur because of PTO • NEVER attempt to remove anything from PTO while it is in motion. • A tractor engine should always be shut off before leaving the operators seat to perform any adjustment, lubrication, or cleanout of implement www.osh.dol.govt

  18. PTO Shields • Developed to make tractor PTO operation safer. • Shields should always be kept in place when machine is running.

  19. PTO Shield Types • Master – prevent contact with PTO stub shaft • Stub shaft guard – enclose stub shaft when not being used • Tunnel Shield – attaches to master shield

  20. PTO Shields Types (cont.) • Integral-journal Shield – completely encloses PTO shaft and rotates with shaft • Fully shielded power shaft (1972) - completely covers universal joints and PTO shaft coupler

  21. What should you do if- • When working on someone’s farm and the boss tells you to use a piece of machinery, but the PTO shaft guard is missing. What should you do? • A- Perform the task without saying anything • B- Wrap the shaft in duct tape, because duct tape fixes everything! • C- Talk to your adult supervisor about the missing shield and tell them the shield needs to be put on before doing the assigned task.

  22. HYDRAULICS • Provides power for steering, brakes, lifting, and powering equipment • Uses tractor engine to operate hydraulic systems

  23. Hydraulics Safety • Check for leaks using a card as shown. • NEVER USE HAND OR FINGERS! • Escaping hydraulic under extreme pressure • Can penetrate the skin causing serious injury.

  24. REMOTE HYDRAULIC CYLINDERS • Single Acting - One pressure line • Double Acting -Two pressure lines - Driven by the tractors hydraulic pump • Flow adjustment possible

  25. Hand Signals Why do we use them? Accidents frequently occur due to…… • Equipment being loud • Can not hear each other • Universal communication

  26. Slow it down – decrease speed Move out – Take off This far to go Raise equipment Follow Me Stop http://www.four-h.purdue.edu/tractor_safety/

  27. Stop the Engine Start the Engine Come to Me Lower Equipment Speed Up http://www.four-h.purdue.edu/tractor_safety/

  28. CONCLUSION

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