PUMP GP-FUEL 20R6602 - Caterpillar

VIEW A-A OF ROTOR OIL PUMP(1) Clearance of oil pump gear rotor tip ... .002 to .008 in.(0.05 to 0.20 mm) Maximum permissible clearance of oil pump gear rotor tip ... .011 in.(0.28 mm) (2) 9L9243 Spring for relief valve: Length under test force ... 2.529 in.(64.24 mm)Test force ... 39 2 lb.(175 9 N)Free length after test ... 3.50 in.(88.9 mm)Outside diameter ... .875 in.(22.23 mm)Oil pressure measured at oil manifold [SAE 30 oil at 200 10° F (93 6° C)]: High idle ... 70 10 psi(480 70 kPa)Low idle minimum ... 15 psi(105 kPa)(3) Front housing assembly.(4) Oil pump cover assembly.(5) Diameter of bearing for rotor (new) ... 2.8041 .0022 in.(71.224 0.056 mm) Diameter of rotor (new) ... 2.7980 .0005 in.(71.069 0.013 mm)(6) Width of oil pump rotors (new) ... .8730 .0003 in.(22.174 0.008 mm) Depth of counterbore in front housing (new) ... .878 .001 in.(22.30 0.03 mm)(7) Maximum permissible end clearance of oil pump gears when measured with oil pump installed to front cover ... .006 in.(0.15 mm)