DRIVE TRAIN SECTION 7
Page 29
DRESSTA TD-25M EXTRA
SERVICE DIAGNOSIS
1. If main pressure M, supplying the steering valve, is low, disconnect supply hose (3, Fig. 7.10)
from the pressure regulator valve and plug the tee (2), to ensure that the M pressure is not
connected to any leakage in the steering system.
2. Start the engine and take the M main pressure again. Refer to TRANSMISSION AND TORQUE
CONVERTER OIL PRESSURE TEST in this Section. Shut off the engine.
3. If the pressures is correct with the steering valve blocked and incorrect with the steering valve
connected, then the steering system needs to be further checked. Refer to STEERING
SYSTEM OIL PRESSURE CHECK in this Section.
4. Remove plug from the tee (2) and reconnect supply hose (3) to the pressure regulator valve.
17. PRIORITY VALVE PRESSURE CHECK AND ADJUSTMENT PROCEDURE
The priority valve is located at the machine L.H. side, under the drive train system filters, behind
the diagnostic center (see Fig. 7.11).
The valve is not under normal diagnostic procedure. In case of valve repair or replacement check
the pressure and adjust it if needed. Refer to procedures described below.
Fig. 7.11. Pressure Gauge Connect Point
1. Priority Valve
2. Quick Disconnect Fitting
3. Priority Valve Pressure Regulator
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