ALTERNATOR 3792651 - Caterpillar

Type 1
Illustration 1 g00369992
(1) Pump cover assembly and seal (2) Pump body Clearance between pump cover assembly and top of gears ... 0.022 to 0.048 mm (0.0009 to 0.0019 inch)Note: The shaft assembly must rotate freely after the cover's bolts are tight. (3) 6N-1069 Spring (for relief valve) Length under test force ... 33.96 mm (1.337 inch) Test force ... 26 1 N (5.9 0.3 lb) Free length after test ... 53.52 mm (2.107 inch) Outside diameter ... 10.31 mm (0.406 inch)Pressure of fuel to open bypass valve ... 690 + 110 - 0 kPa (100 + 16 - 0 psi)Fuel flow requirements at 1725 pump rpm: Minimum ... 5.3 L/min (1.4 US gpm)Fuel flow requirements with fuel inlet's temperature at 40° C (104° F): Back pressure ... 414 kPa (60 psi) (4) Nut for 6N-1069 Spring Torque for nut ... 37 4 N m (27 3 lb ft) (5) Nut Torque for nut ... 30 7 N m (22 5 lb ft)Type 2
Illustration 2 g01024387
(1) Tighten the retaining bolt to the following torque. ... 37 4 N m (27 3 lb ft) (2) 6N-1069 Spring Length under test force ... 33.96 mm (1.337 inch) Test force ... 26 1 N (5.8 0.2 lb) Free length after test ... 53.52 mm (2.107 inch) Outside diameter ... 10.31 mm (0.406 inch)Fuel pressure that is needed to open the bypass valve ... 230 kPa (33.4 psi) (3) Fuel pump cover (A) Install the seal to the following depth from the top of the cover. ... 22.61 0.05 mm (0.890 0.002 inch) (B) Clearance between gear and housing ... 0.8 0.5 mm (0.032 0.020 inch) (4) Install the gear shaft within the following distance from the edge of the housing. ... 0.25 mm (0.010 inch) (5) Gear shaft bearing Bearing bore diameter after installation of the bearing ... 12.581 0.013 mm (0.4953 0.0005 inch) (C) Install the upper seal to the following dimension from the bottom of the pump housing. ... 26.19 0.13 mm (1.031 0.005 inch) (D) Install the lower seal to the following dimension from the bottom of the pump housing. ... 14.2 0.5 mm (0.56 0.02 inch) (6) Tighten the nut to the following torque. ... 30 7 N m (22 5 lb ft)Note: The shaft assembly must rotate freely after the cover bolts are tightened.
Illustration 3 g01024390
(E) Install the dowel pin to the following dimension from the top of the pump housing. ... 5.6 0.5 mm (0.22 0.02 inch)When testing the fuel transfer pump is using diesel fuel, the pump should be within the following specifications.Run the pump at 1050 rpm. Adjust the flow to 2.5 L/min (0.66 US gpm). The full bypass