FRONT HYDRAULIC LINES GROUP 5K6270 - Caterpillar

Opening pressure of relief valve ... 1725 to 1775 psi(11900 to 12245 kPa)Pressure to each steering cylinder with valve in HOLD position ... 55 15 psi(380 105 kPa)Permissible difference in pressure (between steering cylinders) with valve in HOLD position ... 20 psi(140 kPa)Maximum opening pressure of flow control valve ... 115 psi(795 kPa)(1) 4J3840 Spring for valve spool: Length under test force ... 1.73 in.(43.9 mm)Test force ... 30.0 1.5 lb.(40 1.7 N m)Free length after test ... 3.21 in.(81.5 mm)Outside diameter ... 1.81 in.(46.0 mm)(2) 3J9697 Shims to move valve spool (to get same oil pressure to each steering cylinder).(3) 3J7470 Shim thickness ... .048 in.(1.22 mm) One shim will change pressure ... 380 psi(2635 kPa)3J7473 Shim thickness ... .005 in.(0.13 mm)One shim will change pressure ... 40 psi(280 kPa)(4) 4F7115 Spring for relief valve: Length under test force ... 1.34 in.(34.0 mm)Test force ... 50.1 to 58.8 lb.(222 to 261 N)Free length after test ... 1.69 .06 in.(42.9 1.5 mm)Outside diameter ... .469 in.(11.91 mm)(5) 6J7240 Spring for dump valve: Length under test force ... 1.87 in.(47.5 mm)Test force ... 50.5 4.7 lb.(224 21 N)Free length after test ... 2.38 in.(60.5 mm)Outside diameter ... 1.200 in.(30.48 mm)(6) 2J6088 Spring for dump valve: Length under test force ... 1.53 in.(38.9 mm)Test force ... 22.05 1.10 lb.(100 5 N)Free length after test ... 2.34 in.(59.4 mm)Outside diameter ... .81 in.(20.6 mm)