3304B & 3306B GENERATOR SET ENGINES Caterpillar


Fuel Injection Pump

Usage:

Torque for the nuts that hold the fuel lines (use 5P144 Fuel Line Socket) ... 40 ± 7 N·m (30 ± 5 lb ft)

(1) Torque for bushing ... 165 ± 14 N·m (120 ± 10 lb ft)

(2) 8N1415 Spring (reverse flow check):

Length under test force ... 8.69 mm (.342 in.)

Test force ... 111.21 ± 6.5 N (25 ± 1.3 lb.)

Free length after test ... 12.12 mm (.477 in.)

Outside diameter ... 9.78 mm (.385 in.)

(3) Thickness of 4W6869 Spacer ... 5.049 mm (.1988 in.)

(4) 7N1067 Spring:

Length under test force ... 43.52 mm (1.713 in.)

Test force ... 116.5 ± 5.8 N (26.2 ± 1.3 lb.)

Free length after test ... 48.73 mm (1.918 in.)

Outside diameter ... 25.9 mm (1.02 in.)

(5) Length of pump plunger (new) ... 73.886 ± 0.013 mm (2.9089 ± .0005 in.)

Minimum permissible length (worn) ... 73.873 mm (2.9084 in.)

(6) Bore in the bearings for the rack:

Bearing at the rear ... 12.746 ± 0.045 mm (.5018 ± .0018 in.)

Bearing at the front ... 12.767 ± 0.058 mm (.5026 ± .0023 in.)

Diameter of fuel rack ... 12.662 ± 0.005 mm (.4985 ± .0002 in.)

(7) Bore in bearings for the camshaft:

Front ... 55.090 ± 0.039 mm (2.1689 ± .0015 in.)

Rear ... 68.339 ± 0.039 mm (2.6905 ± .0015 in.)

Camshaft bearing surface (journal) diameter:

Front ... 55.000 ± 0.013 mm (2.1654 ± .0005 in.)

Rear ... 68.250 ± 0.013 mm (2.6870 ± .0005 in.)

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