3408C & 3412C INDUSTRIAL ENGINES Caterpillar


Governor And Fuel Pump Drive (Automatic Timing Advance Unit)

Usage:

(1) Weight (two).

(2) Outer Spring:

3408C:

Length under test force ... 57.2 mm (2.25 in)

Test force ... 58.3 ± 2.9 N (13.10 ± .65 lb)

Free length after test ... 68.2 mm (2.69 in)

Outside diameter ... 25.3 mm (1.00 in)

Color Code (stripes) ... one purple

3412C:

Length under test force ... 49.3 mm (1.94 in)

Test force ... 100.5 ± 5.0 N (22.59 ± 1.13 lb)

Free length after test ... 68.1 mm (2.68 in)

Outside diameter ... 25.4 mm (1.00 in)

Color Code (stripes) ... one red, one yellow

(3) Middle Spring:

3408C:

Length under test force ... 57.2 mm (2.25 in)

Test force ... 19.4 ± 1.0 N (4.36 ± .22 lb)

Free length after test ... 62.3 mm (2.45 in)

Outside diameter ... 18.3 mm (.72 in)

/Color Code (stripes) ... one pink

3412C:

Length under test force ... 49.3 mm (1.94 in)

Test force ... 72.4 ± 3.6 N (16.26 ± .81 lb)

Free length after test ... 68.1 mm (2.68 in)

Outside diameter ... 18.3 mm (.72 in)

Color Code (stripes) ... one blue, one brown

(4) Inner Spring:

3408C:

Length under test force ... 43.0 mm (1.69 in)

Test force ... 4.1 ± 0.2 N (.93 ± .05 lb)

Free length after test ... 44.1 mm (1.74 in)

Outside diameter ... 13.6 mm (.54 in)

Color Code (stripes) ... one gray

3412C:

Length under test force ... 35.8 mm (1.41 in)

Test force ... 9.9 ± .5 N (2.22 ± 0.11 lb)

Free length after test ... 38.4 mm (1.51 in)

Outside diameter ... 13.7 mm (.54 in)

Color Code (stripes) ... one green, one white

(5) Torque for the four bolts ... 136 ± 7 N· (100 ± 5 lb ft)

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