CYLINDER GP 6E1428 - Caterpillar

Pressure setting of relief valve with engine at high idle ... 13 800 170 kPa (2000 25 psi)Pressure to each steering cylinder with valve in NEUTRAL position ... 590 105 kPa (85 15 psi)Permissible difference in pressures (between steering cylinders) with valve in NEUTRAL position ... 70 kPa (10 psi)Opening pressure of flow control valve (maximum) ... 1170 kPa (170 psi)(1) Torque for plug (orifice) ... 14 3 N m (10 2 lb ft)(2) 2J6088 Spring (outer) for flow control valve: Length under test force ... 38.9 mm (1.53 in)Test force ... 100 5 N (22.1 1.1 lb)Free length after test ... 59.4 mm (2.34 in)Outside diameter ... 20.62 mm (.812 in)(3) 4J7490 Spring (inner) for flow control valve: Length under test force ... 41.4 mm (1.63 in)Test force ... 59 3 N (13.3 .7 lb)Free length after test ... 50.8 mm (2.00 in)Outside diameter ... 15.2 mm (.60 in)(4) 4F7115 Spring for pilot valve: Color code ... brown stripeLength under test force ... 34.1 mm (1.34 in)Test force ... 242 20 N (54.4 4.4 lb)Free length after test ... 42.9 mm (1.69 in)Outside diameter ... 11.9 mm (.47 in)(5) 3H2549 Shim thickness ... 0.25 mm (.010 in) One shim will change pressure ... 280 kPa (40 psi)3J7470 Shim thickness ... 1.22 mm (.048 in)(6) 7F9802 Spring (inner) for valve spool: Length under test force ... 47.8 mm (1.88 in)Test force ... 105 8 N (23.9 1.9 lb)Free length after test ... 84.1 mm (3.31 in)Outside diameter ... 31.8 mm (1.25 in)(7) 7H0832 Spring (outer) for valve spool: Length under test force ... 38.9 mm (1.53 in)Test force ... 180 13 N (40 3 lb)Free length after test ... 55.9 mm (2.20 in)Outside diameter ... 42.4 mm (1.67 in)(8) Shims used to move valve spool (to get same oil pressure to each steering cylinder).Thickness of each shim: 5J4776 ... 0.13 mm (.005 in)4J8224 ... 0.25 mm (.010 in)(9) 4J1105 Shim for Flow Control Valve: Thickness of Shim ... 0.79 mm (.031 in) Add shims to increase cylinder flow. Remove shims to decrease cylinder flow.(10) 4J8947 Spring for ball check valve: Length under test force ... 12.7 mm (.50 in)Test force ... 0.34 0.03 N (.075 .006 lb)Free length after test ... 16.5 mm (.65 in)Outside diameter ... 7.9 mm (.312 in)