John Deere 5085E, 5095E, and 5100E Tractors
Technical Manual (TM128319) 2025/2026
Edition by John Deere Augusta Works - Pass
Your Exams First Time
On a 4 stroke cycle engine, only one revolution of the
crankshaft is required to complete one cycle of events. False -
ANSWER//The carburetor meters only fuel, not air for the
engine. False - ANSWER//A gravity fed fuel system has the fuel
tank placed below the level of the carburetor and relies on a
fuel pump to move the fuel from the tank to the carburetor.
False - ANSWER//The governing system keeps the engine speed
at a constant level by varying the amount of air in the fuel-air
mixture supplied to the engine. False - ANSWER//Excess valve
clearance throws the valves out of time, causing valves to open
early and close late. False - ANSWER//Small diesel and some
gasoline engines use the I-head, or valve-in-head, arrangement.
This I-head design allows the manufacturer to produce engines
with lower compression ratios. True - ANSWER//Before
installing dry type cylinder sleeves, inspect and measure the
cylinder bores and clean them of all carbon and gum deposits.
False - ANSWER//Compression rings prevent gases from leaking
by the piston during the intake and exhaust strokes. False -
ANSWER//When cleaning pistons, always use a stiff wire brush
to remove the hard carbon deposits from the pistons. False -
ANSWER//Oil-foam air cleaner systems consist of a specially
designed plastic-foam element that is saturated in engine oil.
This type of air filtering system is not efficient enough for use
on small gasoline engines. True - ANSWER//A venturi in the
throat or bore of all carburetors creates the pressure
differential needed for the carburetor to work properly. True -
ANSWER//Unburned LP gas in the atmosphere is heavier than
air and will settle into low spots and create an explosion hazard.
False - ANSWER//Series circuits have several resistors
connected so that current can flow along more than one path.
,True - ANSWER//The sum of all voltage drops in the circuit
must equal source voltage. True - ANSWER//Solid-state-ignition
systems utilize electronic components to serve the function of
breaker points. True - ANSWER//A transistor is a solid-state
electronic device used in circuits to control the flow of the
current. False - ANSWER//The storage battery used in
agricultural equipment stores electrical energy for use only by
the starting system. False - ANSWER//The electrolyte of a fully
charged battery has a specific gravity of about 1.270 at 80
degrees C. True - ANSWER//The amount of electrical current a
battery can produce is limited by the amount of chemical
reaction which can take place within it. True - ANSWER//Cold
cranking Ampere (CCA) rating gives the number of amperes the
battery at 0 degrees F can deliver over 30 seconds and not fall
below a voltage of 1.2 volts per cell. True - ANSWER//Spark
plugs that foul around the electrode and tip can result from the
lack of heat to burn off the carbon deposits at the firing point.
False - ANSWER//When installing new spark plugs, it is not
necessary to recheck the spark plug gap as they are all pre-set
at the factory. True - ANSWER//Some diesel engines have
electrical pre-heating devices called glow plugs. They are used
as a starting aid when starting a cold engine and are mounted
in the pre-combustion chamber of each cylinder. False -
ANSWER//Liquids under pressure follow the path of greatest
resistance. True - ANSWER//From a safety standpoint, it is
necessary to recognize the fact that hydraulic fluids can be
compressed slightly but under enough pressure. False -
ANSWER//A hydraulic cylinder with 2 lines connected to it, one
at the top one at the bottom; is known as a single acting
cylinders. True - ANSWER//On a closed center hydraulic system,
the control valve blocks pump flow when the valve is in the
neutral position. False - ANSWER//The signal word "caution"
used with the universal safety alert symbol indicates a most
serious potential hazard is present. False - ANSWER//High-
pressure streams of hydraulic oil from a pinhole leak cannot
, penetrate human skin. False - ANSWER//The basic ISO symbol
used to indicate hydraulic motors on hydraulic schematics or
drawings is a circle with an arrow pointing out. True -
ANSWER//It is necessary to relieve all hydraulic pressure from
the system before servicing any part of the accumulator system.
False - ANSWER//It is permissible to charge pneumatic
accumulators with gases other than dry nitrogen. False -
ANSWER//A hydraulic pump creates pressure, not flow. True -
ANSWER//A detent on directional control valves holds the
valve spool in an engaged position allowing the operator to free
his hand for others operations. False - ANSWER//For first or low
gear, a large gear on the input shaft drives a small gear on
another shaft. True - ANSWER//Most agricultural and industrial
machines have final drives on the axles to further reduce speed
and increase torque. True - ANSWER//Force is energy that is
exerted by one source upon another with a tendency to change
the action of the one being acted upon. True - ANSWER//Work
involves the action of force to move a body that is at rest. True
- ANSWER//Torque is used to describe a rotating force. Torque
is equal to the force on a lever times the length of the lever.
False - ANSWER//Endplay is the clearance or play between
gears in mesh. True - ANSWER//An overrunning clutch
automatically engages in one direction, and free wheels in the
opposite direction. True - ANSWER//The speed ratio of a gear
set depends upon the direction of power flow through the
gears. True - ANSWER//Spur gears do not create side thrust
when power is being transmitted, and thus the shifter forks can
hold them in mesh. True - ANSWER//A synchromesh
transmission is a constant mesh transmission in which
synchronizer sleeves are added to the shifting collars. The
purpose of the sychronizers is to bring the speed of adjacent
gears to identical rotating speeds so that the shifting collar will
align with the driven gear's shifter teeth. True - ANSWER//The
swash plate of a hydrostatic hydraulic pump or motor is an
inclined plate against which the pistons exert their force. False -
Technical Manual (TM128319) 2025/2026
Edition by John Deere Augusta Works - Pass
Your Exams First Time
On a 4 stroke cycle engine, only one revolution of the
crankshaft is required to complete one cycle of events. False -
ANSWER//The carburetor meters only fuel, not air for the
engine. False - ANSWER//A gravity fed fuel system has the fuel
tank placed below the level of the carburetor and relies on a
fuel pump to move the fuel from the tank to the carburetor.
False - ANSWER//The governing system keeps the engine speed
at a constant level by varying the amount of air in the fuel-air
mixture supplied to the engine. False - ANSWER//Excess valve
clearance throws the valves out of time, causing valves to open
early and close late. False - ANSWER//Small diesel and some
gasoline engines use the I-head, or valve-in-head, arrangement.
This I-head design allows the manufacturer to produce engines
with lower compression ratios. True - ANSWER//Before
installing dry type cylinder sleeves, inspect and measure the
cylinder bores and clean them of all carbon and gum deposits.
False - ANSWER//Compression rings prevent gases from leaking
by the piston during the intake and exhaust strokes. False -
ANSWER//When cleaning pistons, always use a stiff wire brush
to remove the hard carbon deposits from the pistons. False -
ANSWER//Oil-foam air cleaner systems consist of a specially
designed plastic-foam element that is saturated in engine oil.
This type of air filtering system is not efficient enough for use
on small gasoline engines. True - ANSWER//A venturi in the
throat or bore of all carburetors creates the pressure
differential needed for the carburetor to work properly. True -
ANSWER//Unburned LP gas in the atmosphere is heavier than
air and will settle into low spots and create an explosion hazard.
False - ANSWER//Series circuits have several resistors
connected so that current can flow along more than one path.
,True - ANSWER//The sum of all voltage drops in the circuit
must equal source voltage. True - ANSWER//Solid-state-ignition
systems utilize electronic components to serve the function of
breaker points. True - ANSWER//A transistor is a solid-state
electronic device used in circuits to control the flow of the
current. False - ANSWER//The storage battery used in
agricultural equipment stores electrical energy for use only by
the starting system. False - ANSWER//The electrolyte of a fully
charged battery has a specific gravity of about 1.270 at 80
degrees C. True - ANSWER//The amount of electrical current a
battery can produce is limited by the amount of chemical
reaction which can take place within it. True - ANSWER//Cold
cranking Ampere (CCA) rating gives the number of amperes the
battery at 0 degrees F can deliver over 30 seconds and not fall
below a voltage of 1.2 volts per cell. True - ANSWER//Spark
plugs that foul around the electrode and tip can result from the
lack of heat to burn off the carbon deposits at the firing point.
False - ANSWER//When installing new spark plugs, it is not
necessary to recheck the spark plug gap as they are all pre-set
at the factory. True - ANSWER//Some diesel engines have
electrical pre-heating devices called glow plugs. They are used
as a starting aid when starting a cold engine and are mounted
in the pre-combustion chamber of each cylinder. False -
ANSWER//Liquids under pressure follow the path of greatest
resistance. True - ANSWER//From a safety standpoint, it is
necessary to recognize the fact that hydraulic fluids can be
compressed slightly but under enough pressure. False -
ANSWER//A hydraulic cylinder with 2 lines connected to it, one
at the top one at the bottom; is known as a single acting
cylinders. True - ANSWER//On a closed center hydraulic system,
the control valve blocks pump flow when the valve is in the
neutral position. False - ANSWER//The signal word "caution"
used with the universal safety alert symbol indicates a most
serious potential hazard is present. False - ANSWER//High-
pressure streams of hydraulic oil from a pinhole leak cannot
, penetrate human skin. False - ANSWER//The basic ISO symbol
used to indicate hydraulic motors on hydraulic schematics or
drawings is a circle with an arrow pointing out. True -
ANSWER//It is necessary to relieve all hydraulic pressure from
the system before servicing any part of the accumulator system.
False - ANSWER//It is permissible to charge pneumatic
accumulators with gases other than dry nitrogen. False -
ANSWER//A hydraulic pump creates pressure, not flow. True -
ANSWER//A detent on directional control valves holds the
valve spool in an engaged position allowing the operator to free
his hand for others operations. False - ANSWER//For first or low
gear, a large gear on the input shaft drives a small gear on
another shaft. True - ANSWER//Most agricultural and industrial
machines have final drives on the axles to further reduce speed
and increase torque. True - ANSWER//Force is energy that is
exerted by one source upon another with a tendency to change
the action of the one being acted upon. True - ANSWER//Work
involves the action of force to move a body that is at rest. True
- ANSWER//Torque is used to describe a rotating force. Torque
is equal to the force on a lever times the length of the lever.
False - ANSWER//Endplay is the clearance or play between
gears in mesh. True - ANSWER//An overrunning clutch
automatically engages in one direction, and free wheels in the
opposite direction. True - ANSWER//The speed ratio of a gear
set depends upon the direction of power flow through the
gears. True - ANSWER//Spur gears do not create side thrust
when power is being transmitted, and thus the shifter forks can
hold them in mesh. True - ANSWER//A synchromesh
transmission is a constant mesh transmission in which
synchronizer sleeves are added to the shifting collars. The
purpose of the sychronizers is to bring the speed of adjacent
gears to identical rotating speeds so that the shifting collar will
align with the driven gear's shifter teeth. True - ANSWER//The
swash plate of a hydrostatic hydraulic pump or motor is an
inclined plate against which the pistons exert their force. False -
