5. 5. STEERING VALVE STEERING VALVE (EHPS) PRESSURE TEST PRESSURE TEST SPECIFICATION SPECIFICATION Oil temperature 45 佳 5 C (113 佳 9 F) Engine speed High idle Oil pressure 24.5 佳 0.05 MPa 余 (250 佳 5 bar, 3560 佳 71 psi) 余 GAUGE AND TOOL GAUGE AND TOOL Gauge 0~35 MPa (0~350 bar , 0~5000 psi ) Temperature reader Relief valve CR CL 1) Connect gauge to test port. 2) Install temperature reader (see installation procedure in this group). 3) Install frame locking bar. 4) Heat hydraulic oil to specifications (see hydraulic oil warm up procedure at page 6-55).
Test port 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) 侍 6) Read pressure gauge. This is the steering valve relief pressure. Safety lock bar If pressure in not to specification, turn adjusting screw in relief cartridge using a hex head wrench (6 mm ) to adjust pressure. 7) If pressure cannot be adjusted to specifica- tion, disassemble and inspect steering valve.
757F5SE12 5-26