3408B and 3408C Industrial and Marine Engines Caterpillar

Illustration 1	g01022400

(1) 6N-0515 Spring

Length under test force ... 46.00 mm (1.811 inch)

Test force ... 30 ± 2 N (6.7 ± 0.4 lb)

Free length after test ... 74.9 mm (2.95 inch)

Outside diameter ... 20.57 mm (0.810 inch)

Color code ... one yellow stripe

(1) 7N-0209 Spring

Length under test force ... 32.258 mm (1.2700 inch)

Test force ... 88 ± 8 N (19.8 ± 1.8 lb)

Free length after test ... 37.8 mm (1.49 inch)

Outside diameter ... 45.42 mm (1.788 inch)

Color code ... two yellow stripes

Note: To test the spring rate, preload the spring to 16 N (3.6 lb). Compress the spring for another 10 mm (0.4 inch) and check the load that is on the spring at this point. The load should be 173.6 ± 11.0 N (39.03 ± 2.47 lb).

(1) 6N-0513 Spring

Length under test force ... 13.97 mm (0.550 inch)

Test force ... 120 ± 9 N (27.0 ± 2.0 lb)

Free length after test ... 31.0 mm (1.22 inch)

Outside diameter ... 32.537 mm (1.2810 inch)

Color code ... one yellow stripe

Note: To test the spring rate, preload the spring to 50 N (11.2 lb). Compress the spring for another 10 mm (0.4 inch) and check the load that is on the spring at this point. The load should be 120 ± 5 N (27.0 ± 1.1 lb).

(1) 9N-1754 Spring

Length under test force ... 12.0 mm (0.47 inch)

Test force ... 6.22 ± 0.44 N (1.398 ± 0.099 lb)

Free length after test ... 17.5 mm (0.69 inch)

Outside diameter ... 4.57 mm (0.180 inch)