Service Manual

ZT-2100 57
HydrostaticTransmission: The combination of a hydraulic pump and motor in one housing to
form a device for the control and transfer of power.
InletLine:A supply line to the pump.
IntegratedZero-TurnTransaxle:The combination of a hydrostatic transmission and gear case
in one housing to form a complete transaxle.
Manifold:A conductor which provides multiple connection ports.
Neutral: Typically described as a condition in which uid ow and system pressure is below that
which is required to turn the output shaft of the motor.
PressureDecay: A falling pressure.
Priming:The lling of the charge circuit and closed loop of the uid power system during start
up, frequently achieved by pressurizing the uid in the inlet line.
Purging:The act of replacing air with uid in a uid power system by forcing uid into all of the
components and allowing the air a path of escape.
RatedFlow: The maximum ow that the power supply system is capable of maintaining at a
specic operating pressure.
Scoring:Scratches in the direction of motion of mechanical parts caused by abrasive contami-
nants.
SwashPlate:A mechanical device used to control the displacement of the pump pistons in a
uid power system.
SystemChargeCheckValve: A valve controlling the replenishing ow of uid from a charge
circuit to the closed loop in a uid power system.
SystemPressure: The pressure which overcomes the total resistance in a system, including all
efciency losses.
Valve: A device which controls uid ow direction, pressure, or ow rate.
VariableDisplacementPump: A pump in which the displacement per revolution can be var-
ied.
VolumetricDisplacement: The volume for one revolution.