... steering valve) high pressure check at page 5- 2 8.IF OKIF OKDo steering system leakage check at page 5- 2 9.IF OKIF OKDo main hydraulic pump flow test at page 6 -5 8.Control valve lift checkControl valve ... warm-up Hydraulic system warm-up procedureprocedureRun engine at high idle.Refer to page 6 -5 7.Hold a hydraulic function over relief to heat oil. (don't keep relief condi...