ZT-5400 Powertrain
41
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 fluid flow and system pressure is below that
which is required to turn the output shaft of the motor .
Pressure Decay:
A falling pressure .
Priming:
The filling of the charge circuit and closed loop of the fluid power system during start
up, frequently achieved by pressurizing the fluid in the inlet line.
Purging:
The act of replacing air with fluid in a fluid power system by forcing fluid into all of the
components and allowing the air a path of escape .
Rated Flow:
The maximum flow that the power supply system is capable of maintaining at a
specific 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
fluid power system.
System Charge Check Valve:
A valve controlling the replenishing flow of fluid from a charge
circuit to the closed loop in a fluid power system.
System Pressure:
The pressure which overcomes the total resistance in a system, including all
efficiency losses.
Valve:
A device which controls fluid flow direction, pressure, or flow rate.
Variable Displacement Pump:
A pump in which the displacement per revolution can be var-
ied .
Volumetric Displacement:
The volume for one revolution .
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