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Home > Ordnance Documents and other related manuals > > Figure 1-18. Output Pump Check Valve
Major Components of the Hydraulic System.
Main Pressure Regulator

Introduction to the X1100-3B Transmission, M1A1 Abrams Tank
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b. Output Pump Check Valve (fig. 1-18).
The output pump check
valve is a differential check valve made up of a valve and calibrated
spring in a bore.
This valve senses the difference in the pressure between the main
pump and the output pump.  Normally, the main pump pressure is higher
than the output pump pressure and the valve will stay closed.  If the
main pump fails, the check valve allows the output pump to feed the
primary circuit.
Figure 1-18.
Output Pump Check Valve.
c. Output Pump Bypass Valve (fig. 1-19).  This valve consists of
a calibrated spring, seal, guide pin, and cover.  Spring force moves
the valve to the right and closes the valve preventing oil from
flowing through.
Directing converter-in pressure to the right end
overcomes spring force and move the valve to the right and allows
output pump oil to flow through valve.
Figure 1-19.
Output Pump Bypass Valve.
27
OD1710






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