D353 INDUSTRIAL & MARINE ENGINES Caterpillar


Oil Pump

Usage:

Pressure of SAE 30 oil at 210 ± 10° F (99 ± 6° C) measured at clean side of the oil filter with engine running at 1000 rpm ... 45 ± 7 psi(310 ± 50 kPa)

Output (approx.) with SAE 10 oil at 200° F (98° C) and engine running at 1200 rpm ... 36 U.S. gpm(136 litre/min)

(1) Torque for bolts ... 100 ± 10 lb. ft.(135 ± 14 N·m)

(2) Diameter of valve ... 1.3735 ± .0005 in.(34.887 ± 0.013 mm)

Bore in body for valve ... 1.3765 ± .0005 in.(34.963 ± 0.013 mm)

(3) 8M2222 Spring for regulating valve:

Length under test force ... 3.63 in.(92.2 mm)

Test force ... 78.1 ± 3.9 lb.(34.7 ± 17.5 N)

Free length after test ... 4.53 in.(115.1 mm)

Outside diameter ... 1.06 in.(26.9 mm)

(4) Torque for nut ... 100 lb. ft.(135 N·m)

Additional torque on nut to align hole for cotter.

(5) Clearance between gears and body of the rear scavenge pump ... .0020 to .0046 in.(0.051 to 0.117 mm)

(6) Clearance between gears and body of main pump ... .0030 to .0056 in.(0.076 to 0.142 mm)

(7) Diameter of bearing surface (journal) of drive shaft ... 1.2278 ± .0003 in.(31.186 ± 0.008 mm)

Bore in bearing for shaft ... 1.2305 ± .0005 in.(31.255 ± 0.013 mm)

(8) Diameter of bearing surface (journal) of idler shaft ... 1.2278 ± .0003 in.(31.186 ± 0.008 mm)

Bore in bearing in idler gear ... 1.2300 to 1.2310 in.(31.242 to 31.267 mm)

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