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5.3
Alternative Cylinder and Motor Test
5.31 Both motors and cylinders may also be tested as shown in drawing B.2.
Disconnect the two lines from the motor and connect the tester into these lines.
Fully open the loading valve, start the pump and bias the directional valve to
allow flow to the inlet port of the tester. Slowly close the loading valve by turning
clockwise and note the flow and pressure. If the flow is below the
manufacturer's data or lower than the pump flow test (3.0) investigate the
control valve function. See Test (5.0). If the flow is correct and the speed is slow
this indicates a defective motor or cylinder.
Operate the directional valve to reverse the flow through the tester and record
the flow throughout the pressure range.
Relief Valve
Pump
Cylinder
Test Hose
Drawing B2
11
Directional Valve
Relief
Valve
Motor
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