OPERATIONAL PERFORMANCE TEST / Component Test Primary Pilot Pressure Adjustment Procedure Adjustment: Adjust the relief valve set pressure if necessary. 1. Remove plug (1) from the relief valve. : 22 mm T178-03-07-001 2. Install the estimated number of shims (2). 3. After adjustment, tighten plug (1). 2 1 : 25 +2 N m (2.5 +0.2 kgf m, 18.4 +1.5 lbf ft) 5. After adjustment, check the set pressure. T111-06-04-004 T4-5-2 Relief Valve NOTE: Standard Change in Pressure (Reference) Shim Thickness (mm) 0.25 0.5 1.0 Change in Relief Pressure kPa (kgf/cm2, psi) 78 (0.8, 11.3) 157 (1.6, 22.8) 304 (3.1, 44.2)