Service Manual
ZT-2800
®
/ZT-3100/ZT-3400™ 47
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
specic 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
efciency 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.