Polaris 2012 Sportsman Forest 500 International Service Manual Download Page 19

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1.16

GENERAL INFORMATION

9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual

Glossary Of Terms

ABDC:

After bottom dead center.

ACV:

Alternating current voltage.

ADC:

Active Descent Control.

Alternator:

Electrical generator producing voltage

alternating current.

ATDC:

After top dead center.

BBDC:

Before bottom dead center.

BDC:

Bottom dead center.

BTDC:

Before top dead center.

CC:

Cubic centimeters.

Center Distance:

Distance between center of crankshaft

and center of driven clutch shaft.

Chain Pitch:

Distance between chain link pins (No. 35 =

3/8, or 1 cm). Polaris measures chain length in number of
pitches.

Crankshaft Run-Out:

Run-out or "bend" of crankshaft

measured with a dial indicator while crankshaft is
supported between centers on V blocks or resting in
crankcase. Measure at various points especially at PTO.

DCV:

Direct current voltage.

Electrical Open:

Open circuit. An electrical circuit which

isn't complete.

Electrical Short:

Short circuit. An electrical circuit which

is completed before the current reaches the intended load.
(i.e. a bare wire touching the chassis).

Engagement RPM:

Engine RPM at which the drive clutch

engages to make contact with the drive belt.

ft.:

Foot/feet.

Ft. lb. / Foot Pound:

A force of one pound at the end of

a lever one foot in length, applied in a rotational direction.

Gram. Unit of weight in the metric system.

gal.:

Gallon.

ID:

Inside diameter.

in.:

Inch/inches.

Inch Pound:

In. lb. 12 in. lbs. = 1 ft. lb.

kg/cm:

Kilograms per square centimeter.

kg-m:

Kilogram meters.

Kilogram/meter:

A force of one kilogram at the end of a

lever one meter in length, applied in a rotational direction.

l or ltr:

Liter.

Left Side:

Always referred to based on normal operating

position of the driver.

Meter/meters.

Mag:

Magneto.

Magnetic Induction:

As a conductor (coil) is moved

through a magnetic field, a voltage will be generated in the
windings. Mechanical energy is converted to electrical
energy in the stator.

mi.:

Mile/miles.

mm:

Millimeter. Unit of length in the metric system. 1mm

= approximately .040,.

Nm:

Newton meters.

OD:

Outside diameter.

Ohm:

The unit of electrical resistance opposing current

flow.

oz.:

Ounce/ounces.

PDM:

Power Distribution Module.

Piston Clearance:

Total distance between piston and

cylinder wall.

psi.:

Pounds per square inch.

PTO:

Power take off.

qt.:

Quart/quarts.

RPM:

Revolutions per minute.

Regulator:

Voltage regulator. Regulates battery

charging system output at approx. 14.5 DCV as engine
RPM increases.

Resistance:

In the mechanical sense, friction or load. In

the electrical sense, ohms. Both result in energy
conversion to heat.

Right Side:

Always referred to based on normal

operating position of the driver.

RPM:

Revolutions per minute.

Seized Piston:

Galling of the sides of a piston. Usually

there is a transfer of aluminum from the piston onto the
cylinder wall. Possible causes: 1) improper lubrication; 2)
excessive temperatures; 3) insufficient piston clearance;
4) stuck piston rings.

Stator Plate:

The plate mounted under the flywheel

supporting the battery charging coils.

TDC:

Top dead center. Piston's most outward travel from

crankshaft.

Volt:

The unit of measure for electrical pressure of

electromotive force. Measured by a voltmeter in parallel
with the circuit.

Watt:

Unit of electrical power. Watts = amperes x volts.

WOT: