Hydraulic Motor Oil Pressure Check

1. Disconnect pressure hose from hydraulic motor, and install oil pressure gauge.
(a) Remove the union bolt and gasket, and disconnect the pressure hose from the hydraulic motor.
(b) Connect the gauge side of a pressure gauge to pressure hose, and the valve side to the hydraulic motor.
2. Inspect oil pressure.

NOTE: Before inspecting the oil pressure, first check that the A/C is off.





(a) Using SST 09843 - 18020, connect terminals OP1 and E1 of the DLC1.

NOTE: When terminals OP1 and E1 are connected, the circuit of the ECT sensor is grounded, fixing the cooling fan speed at approximately 1,100 RPM (Fail-safe operation occurs).

(b) Bleed the hydraulic cooling system.
(c) Keep the engine speed at 2,000 RPM until the fluid temperature reaches the specified temperature of 70 - 90° C (158 - 195° F).
(d) Check the fluid level is correct.
(e) Measure the oil pressure at idling. Oil pressure is 1,177 - 2,452 kPa (171 - 356 psi).
(f) Remove the SST 09843 - 18020 from the DLC1.
(g) Check that the oil pressure decreases.
3. Remove the pressure gauge. Connect the pressure hose to the hydraulic motor with a new gasket and the union bolt and torque to 64 Nm (47 ft. lbs.).