UNIT 6 Tractor Hitches PTO’s Hydraulics .

UNIT 6

Tractor Hitches

PTO’s

Hydraulics

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Tractors are Powerful Machines

Get ‘er done!

Tractor Hook-Up Parts

PTO Shaft

3-Point Hook-Up

Drawbar

Hydraulic Plugs

THE DRAWBAR

Designed to pull loads

Adjust to the correct height to ensure safe towing

Position so the PTO shaft is straight

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2 TYPES #1- Stationary

Extends backward or forward

Two or three positions possible with pin movement

Must be adjusted to PTO

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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/

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

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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.

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Hitch Pin

Lynch Pin

THREE POINT HITCH PARTS:

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Two Lower Draft Links

Top Link

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.

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.

How many different categories of Three-Point hitches are there?

Difference between categories is by size.

Category Max. Drawbar PowerI 20-45 hpII 40-100 hpIII 80-225 hpIV 180-400 hp

(This is on the test…)

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.

Power Take-Off (PTO)

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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

PTO & Drawbar Height Requirements

Type PTO Speed Shaft Size #Teeth Heighton 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”

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

PTO Shields Developed to make

tractor PTO operation safer.

Shields should always be kept in place when machine is running.

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

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

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.

HYDRAULICS Provides power for steering, brakes,

lifting, and powering equipment Uses tractor engine to operate

hydraulic systems

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.

REMOTE HYDRAULIC CYLINDERS

Single Acting- One pressure line

Double Acting-Two pressure lines- Driven by the tractors hydraulic

pump

Flow adjustment possible

Hand Signals

Why do we use them?Accidents frequently occur due to…… Equipment being loud

Can not hear each other

Universal communication

Slow it down – decrease speed This far to go Move out – Take off

Raise equipment

Follow Me Stop

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Stop the Engine

Start the Engine

Come to Me

Speed UpLower

Equipment

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CONCLUSION