GOVERNOR GP 3966871 - Caterpillar

Do not use an air wrench to tighten the housing assembly.
Difference in pressure at which the bypass valve will open ... 250 kPa (36 psi)(1) 7M-1297 Spring for the bypass valve: Length under test force ... 50.8 mm (2.00 in)Test force ... 177 14 N (39.5 3.2 lb)Free length after test ... 75.7 mm (2.98 in)Outside diameter ... 22.4 mm (.880 in)(2) 3S-8652 Spring for the filter element: Length under test force ... 25.4 mm (1.00 in)Test force ... 141 to 166 N (31.6 to 37.2 lb)Free length after test ... 96.5 mm (3.80 in)Outside diameter ... 35.1 mm (1.38 in)