COVER 8P4963 - Caterpillar

Opening pressure of relief valve ... 2650 25 psi(186.3 1.8 kg/cm2)(1) Torque for bolt (two) ... 27 lb. ft.(3.7 mkg)(2) Torque for bolt (two) ... 27 lb. ft.(3.7 mkg)(3) 3J8880 Spring for dump valve (outer): Length under test force ... 2.425 in.(61.59 mm)Test force ... 70.2 3.5 lb.(31.8 1.6 kg)Free length after test ... 2.98 in.(75.8 mm)Outside diameter ... .656 in.(16.66 mm)(4) 3J8879 Spring for dump valve (inner): Length under test force ... 2.612 in.(66.34 mm)Test force ... 31.7 1.6 lb.(14.4 0.7 kg)Free length after test ... 3.02 in.(76.7 mm)Outside diameter ... .384 in.(9.77 mm)(5) Thickness of one 2J8200 Shim ... .010 in.(0.25 mm) One shim will change pressure ... 42 psi(3.0 kg/cm2)