Lake County 4-H Tractor Club
Senior Lawn

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Valve Spring
Pulls valves shut

 

Starter
Activated by electricity, it cranks engine 
to start it 
Air Filter Element
Cleans air to be used by engine

 

Air Cleaner Housing
Holds air filter element and directs air 
through it
Carburetor
Mixes air/fuel for combustion

 

Water Pump
Circulates water to cool engine

 

Rotary Blade Adapter
Connects crankshaft to rotary mower 
blade
Flywheel
Uses its weight to reduce uneven rotation 
of the engine 
Valve
Opens and closes to regulate air/fuel 
mixture and spent gases
Carburetor
Mixes fuel and air for combustion

 

Piston Rings
Seal piston to cylinder walls

 

Idler Pulley
Used to guide or tighten a v-belt
Lawn Sprinkler Head
Sprays water for irrigating lawn

 

Camshaft
Moves valve lifters to open and close 
valves
Fuel Pump
Pumps fuel from tank to carburetor

 

Needle Bearing
Carries a shaft nearly frictionless

 

Sleeve Bearing
An economical bearing used to reduce 
friction on a shaft
Hydraulic Hose
Transmits hydraulic oil from one 
component to another 
V-Belt
Transmits power from one pulley to another

 

Flat Belt
Transmits power from one pulley to another

 

Distributor
Distributes spark to multi cylinder engine

 

Flywheel
Uses its weight to reduce uneven rotation 
of the engine
Piston
Transmits power from the combustion 
chamber to the connecting rod 
Radiator Cap
Regulates and maintains pressure in the 
cooling system 
Sprocket
Transfers power from roller chain to a 
shaft 
Tapered Roller Bearing
Used in pairs to carry a shaft nearly 
frictionless 
Gear
Transfers power from a shaft to another 
gear or vice versa 
Coil
Converts 6 volt source to ultra-high 
voltage for the spark plugs 
Engine Oil Filter
Filters engine oil
Connecting Rod
Connects the piston to the crankshaft 
and transfers power between the two 
Spark Plug Wire
 

 

Starter Solenoid
Engages/energizes starter

 

Forward/Reverse Pedals
Controls forwards/reverse movement 

 

PTO Control Lever
Turns PTO on/off

 

Parking Brake Control Lever
Holds parking brake on, releases it

 

Choke Control Lever
Adjusts choke for starting

 

Cruise Control Set Lever
Locks speed control

 

Valve Cover
Keeps oil in/dirt out of engine

 

Air Filter Precleaner
Washable/it precleans air

 

Air Box Cover
Covers air filter and directs air

 

Tie Rod End
Connects tie rod to wheel assembly

 

Front axle
Connects front wheel assembly to tractor

 

Dump Valve Release
Enables tractor to be pushed
Transmission Filler
 

 

 
Castor Gauge Wheel
Suppports mower deck