OPERATIONAL PERFORMANCE TEST / Component Test Low-Pressure Side of Main Relief Pressure Ad- justment Procedure 1. Loosen lock nut (1). Turn plug (3) counterclock- wise until the specified pressure is obtained. Tighten lock nut (1). Main Relief Valve : 27 mm : Lock Nut (1): 59 to 68 N m (6 to 7 kgf m, 43 to 51 lbf ft) or less 2. After adjustment, check the set pressures. T1V1-04-05-001 T157-05-04-009 Plugs (5, 3) Pressure Decrease Pressure Increase W107-02-05-127 T4-5-12 NOTE: Standard Change in Pressure (Reference) Plug Turns 1/4 1/2 3/4 1 Change in Relief Pressure:
Plug (5) (High-Pressure Side) MPa (kgf/cm2) (psi) 7.1 (72.5) (1030) 14.2 (145) (2060) 21.3 (217.5) (3090) 28.4 (290) (4120) Change in Relief Pressure: Plug (3) (Low-Pressure Side) MPa (kgf/cm2) (psi) 5.3 (54) (770) 10.7 (109) (1550) 16.0 (163) (2320) 21.3 (217) (3090) 3 1 5 4 2 3