Twin Disc TA-90-8501, Руководство оператора

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Twin Disc, Incorporated
Operation
Power Shift Transmission System Operator’s Manual #1020510
Transmission Hydraulic System
See the hydraulic system schematic and piping diagram in the drawing section
of this manual.
The hydraulic system provides oil at correct pressures and flows for operation
and lubrication of the transmission and torque converter. A cascading-type
system is used, wherein the demand for pressure and flow for transmission
functions are supplied in sequence from a single source (two pumps in tandem).
Regulator valves control and maintain the necessary pressures for each function.
As the demand for pressure and flow are met for one area of the system, oil is
cascaded to meet the demands of the next area. Hydraulic system components
and their functions are as follows:
Transmission Sump
The sump is located in the bottom of the transmission housing and serves as a
reservoir for all oil used in the system. Oil level is checked with the sight glass
on the right rear of the transmission.
Please refer to Preventative Maintenance
for oil level check and filling procedures. A suction screen installed in the reservoir
prevents debris from being drawn into the pump inlet. This screen is not
serviceable from the outside.
Pumps
The system oil pumps are assembled together in tandem. They are positive
displacement gear-type pumps, rated at 68 gpm (257 L/min) for the front
element and 52 gpm (197 L/min) for the rear element at 1900 rpm engine
speed. The converter and flywheel housing scavenge pump is rated at 15.3
gpm (57.9 L/min) at 1900 rpm engine speed.