3208 INDUSTRIAL ENGINE – Oil Pump

NOTE: The relief valve guide is a housing where spring (3) is located. Tighten relief valve guide to a torque of … 40 ± 7 N·m (30 ± 5 lb ft)

(1) Front housing assembly.

(2) Oil pump cover assembly.

(3) 1W1788 Spring (pump pressure relief valve):

Length under test force … 59.94 mm (2.360 in)

Test force … 314 ± 14 N (70.6 ± 3.1 lb)

Free length after test … 78.23 mm (3.080 in)

Outside diameter … 22.23 mm (.875 in)

(3) 1W2208 Spring (pump pressure relief valve):

Length under test force … 59.94 mm (2.360 in)

Test force … 290 ± 14 N (65.2 ± 3.1 lb)

Free length after test … 85.85 mm (3.380 in)

Outside diameter … 22.23 mm (.875 in)

(4) Width of oil pump rotors (new) … 36.474 ± 0.008 mm (1.4360 ± .0003 in)

Depth of counterbore in front housing (new) … 36.576 ± 0.025 mm (1.4400 ± .0010 in)

(5) Maximum permissible end clearance of oil pump rotors when measured with oil pump installed to front cover … 0.15 mm (.006 in)

View A-A Of Rotor Oil Pump

(6) Clearance of oil pump rotor tip when measured with oil pump installed to front cover … 0.05 to 0.15 mm (.002 to .006 in)

View A-A Of Front Housing

(7) Bearing junction.

(8) Diameter of bearing for rotor (new) … 71.224 ± 0.056 mm (2.8041 ± .0022 in)

(9) Position of main bearing junction from vertical centerline … 75 ± 30 degrees