Gauges
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When should I check the gauges?
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At start up
Regular intervals during operation
When changes occur in normal sounds of operation
http://web.utk.edu/~tprather/FoothillsTractorClub/Pictures/2000_HomecomingShow/Oliver_Super77_dash.jpg
Instruments
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Common instruments used:
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Engine Speed Indicator (Tachometer)
Oil Pressure Indicator
Engine Temperature Indicator
Fuel Gauge
Air Filter Condition Indicator
Transmission Temperature Indicator
Hydraulic System Oil Level Indicator
Hour Meter
Charge Indicator
http://productimage.tradeindia.com/0030697
9/b/Hour-MeterElectronics.jpg
Tractor Controls
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Color coding for controls:
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Stop Engine—RED
Ground Motion—ORANGE
Power Engagement—YELLOW
Positioning and Adjusting—BLACK
General Rules for Moving Controls
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When using a foot brake, push it in; When
using a hand brake, pull up.
A foot clutch is disengaged when it is pushed
in and engaged when let up
Hand operated engine controls (throttles)
increase engine speed when moved upward or
forward. Foot operated throttles increase speed
when pushed forward or downward by toe
pressure
General Rules for Moving Controls
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Direction of tractor is controlled by specific forward and
reverse gears or by directional controls. If a hand
operated direction control is used, the tractor moves in the
same direction as the control is moved.
The engine stop control is by key and by mechanical
push-pull control. A key is always turned
counterclockwise to stop an engine. A push-pull lever is
always pulled out to stop the engine.
Controls that lift or lower attachments or implements are
generally pushed forward, down, or away for lowering,
and pulled back, up, or toward you for lifting.
A PTO is usually engaged when pulled up or pushed
forward.
RED—Stop Engine
Gasoline Engine—Red letters on key switch
Diesel Engine—Red fuel shut-off switch
*Most diesel engines are shut off with the fuel
shut-off switch, not by the ignition key*
RED—Stop Engine
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Rules for RED:
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Be within 6 inches of the key switch
Be pulled to stop
Be labeled “Pull to Stop Engine”
Remain in the stop position
without continued effort
http://abe.sdstate.edu/hosta/index_files/Task%20Sheets/4.5.1%20Engine%20Stop%20Controls.pdf
ORANGE—Ground Motion
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Ground Motion Controls Include:
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Engine Speed
Transmission Controls
Parking Brake or Park-Lock
Independent Emergency Brakes
Differential Lock
ORANGE—Ground Motion
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Rules for ORANGE:
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http://abe.sdstate.edu/h
osta/index_files/Task%
20Sheets/4.5.2%20Gro
und%20Motion%20Co
ntrols.pdf
Engine speed controls are operated with right hand
and/or right foot
Transmission gearshift patterns must be clearly and
permanently identified
Differential lock controls are engaged with a forward or
downward motion
Brake locks may be a mechanical lock on the drive train
versus a lock on the axle.
YELLOW—Power Engagement
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Power Engagement – Type Controls Include:
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PTO
Cutterheads
Feed Rolls
Elevators
Winches
Unloading Augers
YELLOW—Power Engagement
http://abe.sdstate.edu/hosta/index_files/Task%20Sheets/4.5.3%20Power%20Engagement%20Controls.pdf
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Rules for YELLOW:
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PTO controls designed to move to the rear or downward
to disengage the PTO
Horizontal-mounted rocker switches use the right side to
begin normal machine operation
Vertical-mounted rocker switches use the upper side of
the switch to begin normal machine operation
BLACK—Positioning and Adjusting
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Positioning and Adjusting Controls Include:
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Remote Hydraulic Control
Implement Hitches
Unloading Components on Self-Propelled
Equipment
Engine Chokes and Steering Column Position
Lights, Flashers, and Signals
Cab Comforts (Fans, Radios, Etc.)
BLACK—Positioning and Adjusting
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Rules for BLACK:
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Lift controls operated from the tractor seat must be
clearly identified and are found on the right side of the
cab.
Front-end loader controls must be located on the right
side of the operator.
Foot controls must be pushed forward to lower
equipment.
http://abe.sdstate.edu/hosta/index_files/Task%20Sheets/4.5.4%20Positioning%20and%20Adjusting%20Controls.pdf
Control Devices and Functions
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There are three common types of control
devices used on tractors:
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Foot Controls—Pedals
Hand Controls—Levers, Toggles, Switches,
Knobs, and Buttons
Combination Hand and Foot—Engine Throttles
Tractor Operation Symbols