UNIT 6 Tractors Hitches, PTO`s, and Hydraulics
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Transcript UNIT 6 Tractors Hitches, PTO`s, and Hydraulics
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
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.
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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.
Hitch Pin
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Lynch Pin
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THREE POINT HITCH PARTS:
Top Link
Two Lower
Draft Links
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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 ThreePoint hitches are there?
Difference between categories is by size.
Category
I
II
III
IV
Max. Drawbar Power
20-45 hp
40-100 hp
80-225 hp
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)
www.acs.aone.net
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
on PTO
Height
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
Raise
equipment
This far to go
Move out – Take off
Follow Me
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Stop
Stop the
Engine
Start the
Engine
Speed Up
Come to Me
Lower
Equipment
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CONCLUSION