DRESSTA TD-25M EXTRA, Service Manual

Page: 82 / 595

SECTION 7
DRIVE TRAIN
Page 30
TD-25M EXTRA DRESSTA
SERVICE DIAGNOSIS
Priority Valve Pressure Check
The check is to be carried out at the engine maximum RPM.
1. Check the “M” pressure at the diagnostic center of the drive system, refer to
Transmission
And Torque Converter Oil Pressure Chart in this SECTION.
2. Remove the protective cap from quick disconnect fitting (2, Fig. 7.11) mounted in the elbow at
the priority valve (1).
3. Connect the pressure gauge (refer to SERVICE /SPECIAL TOOLS in this Section) to the quick
disconnect fitting (2) and take pressure. The pressure gauge is to register “M” + 0.2 [MPa].
4. If the pressure taken is outside the specifications, the priority valve pressure regulator (3) calls
for adjustment. Refer to Priority Valve Pressure Adjustment Procedure below.
5. Disconnect the pressure gauge and restore the protective cap.
Priority Valve Pressure Adjustment Procedure
The check is to be carried out at the engine maximum RPM.
1. Connect the pressure gauge and check priority valve pressure as described in Priority Valve
Pressure Check above.
2. To adjust priority valve pressure regulator (2, Fig.7.12), loosen the counter nut (4) and turn the
adjusting screw (3) to get the specified pressure (refer to Priority Valve Pressure Check
procedure above).
3. Tighten the counter nut (4) to the pressure regulator (2) after adjustment. Recheck the priority
valve pressure and disconnect the pressure gauge.
Fig. 7.12. Pressure Gauge Connect Point
1. Priority Valve
2. Priority Valve Pressure Regulator 3. Adjusting Screw
4. Counter Nut