5. 5. STEERING UNIT PRESSURE TEST STEERING UNIT PRESSURE TEST SPECIFICATION SPECIFICATION Oil temperature 45 Ь 5 C (113 Ь 9 F) Engine speed High idle Oil pressure 20.5~21.5 MPa В MCV S (205~215 bar, 3200 Ь 3300 psi) В GAUGE AND TOOL GAUGE AND TOOL Gauge 0~35 MPa (0~350 bar , 0~5000 psi ) Temperature reader Plate 1) Connect gauge to test port. 2) Install temperature reader (see installation procedure in this group). P H 3) Install frame locking bar. Steering unit 4) Heat hydraulic oil to specifications (see hydraulic oil warm up procedure at page 6-58). MCV Run engine at specifications and turn steering wheel rapidly hold approximately 22 N (5 lb force) pressure on wheel with frames locked.
If steering wheel is turned slowly, it will continue to with the frames locked. This will give an incorrect pressure read- ing. If steering wheel continues to turn rapidly with the frames locked, steering system leakage is indicated. 5) A2 B2 A1 B1 ц Steering relief valve 6) Read pressure gauge. This is the steering valve relief pressure. If pressure is not to specification, loosen lock nut (17 mm ) on steering relief valve and turn adjusting screw (5 mm ) to adjust pressure. 7) Safety lock bar If pressure cannot be adjusted to specifica- tion, disassemble and inspect steering unit. 740F5SE10 5-20