2.0 Standard Test Conditions
2.1 Position the Hydraulic Test Unit as described in paragraph 3.0 or 4.0.
2.2 Open loading valve. (Rotate counter-clockwise) and select high flow range.
2.3 Start pump momentarily to ensure that oil flows freely through the hydraulic system,
then run pump at normal maximum speed. Do not change pump speed while using
the loading valve.
2.4 Slowly close Test Unit Loading Valve to develop desired pressure. Run the machine
until normal operating temperature is reached.
2.5 Open the Testing Loading Valve and proceed with required test procedure (see
paragraph 3.0 or 4.0).
2.6 Keep a record of flow readings at various operating pressures for comparison of test
results. The machine Manufacturer’s service manual should be consulted.
3.0 Test 1 - Pump In Line Test (See Test Diagram A1) using DHT or DHCR
3.1 Install the Tester into the system between the pump outlet port and the inlet to the
directional control valve.
3.2 Open Tester loading valve to read maximum pump flow at minimum pressure.
3.3 Close loading valve slowly to increase pressure and note reduction of flow as the
pressure is increased to maximum pump pressure to determine pump condition.
7
Drawing A1
Directional Valve
Cylinder
Remote
Flow Block
Pump
DHT
Test Hose
Relief
Valve
U
S
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