3408C & 3412C INDUSTRIAL ENGINES Caterpillar


Fuel Injection Lines

Usage:

3408C

(1) Tighten fuel line nuts to a torque of ... 40 ± 7 N·m (30 ± 5 lb ft)

(2) Lubricate bore lightly with lubricant being sealed.

(3) Torque for locknut that holds the inner fuel line to the valve cover base ... 30 ± 7 N·m (22 ± 5 lb ft)

(4) Torque for nozzle retainer on nozzle adapter ... 48 ± 7 N·m (35 ± 5 lb ft)

------ WARNING! ------

Be sure the fuel injection line clamps are installed in the correct locations. Incorrectly installed clamps may allow the fuel injection lines to vibrate and become damaged. The damaged lines may leak and cause a fire.

--------WARNING!------

The fuel lines should be removed as a unit and reinstalled as a unit. Align brackets in position to fuel lines such that when the fasteners are tightened no strain will be added to the fuel lines while tightening fasteners.

(5) Clamp location dimensions are in reference to a line (5) through the center of the No. 1 and No. 4 fuel pump outlets.

(A) ... 495 ± 3 mm (19.5 ± .1 in)

(B) ... 345 ± 3 mm (13.6 ± .1 in)

(C) ... 275 ± 3 mm (10.8 ± .1 in)

(D) ... 220 ± 3 mm (8.7 ± .1 in)

(E) ... 170 ± 3 mm (6.7 ± .1 in)

(F) ... 155 ± 3 mm (6.1 ± .1 in)

(G) ... 85 ± 3 mm (3.4 ± .1 in)

(H) ... 170 ± 3 mm (6.7 ± .1 in)

(I) ... 205 ± 3 mm (8.1 ± .1 in)

(J) ... 225 ± 3 mm (8.9 ± .1 in)

(K) ... 425 ± 3 mm (16.7 ± .1 in)

(L) ... 440 ± 3 mm (17.3 ± .1 in)

NOTE: The 6V4980 Torque Screwdriver Tool Group is available for applying the correct torque.

3412C

(1) Torque for nuts that hold the fuel injection lines to the injection pumps and nozzles ... 40 ± 7 N·m (30 ± 5 lb ft)

(2) Lubricate bore lightly with lubricant being sealed.


Typical Illustration

(3) Torque for locknut that holds the inner fuel line to the valve cover base ... 30 ± 7 N·m (22 ± 5 lb ft)

(4) Torque for nozzle retainer on nozzle adapter ... 48 ± 7 N·m (35 ± 5 lb ft)

------ WARNING! ------

Be sure the fuel injection line clamps are installed in the correct locations. Incorrectly installed clamps may allow the fuel injection lines to vibrate and become damaged. The damaged lines may leak and cause a fire.

--------WARNING!------

The fuel lines should be removed as a unit and reinstalled as a unit. Align brackets in position to fuel lines such that when the fasteners are tightened no strain will be added to the fuel lines while tightening fasteners.

(5) Clamp location dimensions are in reference to a line (5) through the center of the No. 1 and No. 8 fuel pump outlets.

(A) ... 790 ± 3 mm (31.1 ± .1 in)

(B) ... 526 ± 3 mm (20.7 ± .1 in)

(C) ... 480 ± 3 mm (18.9 ± .1 in)

(D) ... 476 ± 3 mm (18.7 ± .1 in)

(E) ... 275 ± 3 mm (10.8 ± .1 in)

(F) ... 225 ± 3 mm (8.9 ± .1 in)

(G) ... 213 ± 3 mm (8.4 ± .1 in)

(H) ... 194 ± 3 mm (7.6 ± .1 in)

(I) ... 176 ± 3 mm (6.9 ± .1 in)

(J) ... 120 ± 3 mm (4.7 ± .1 in)

(K) ... 117 ± 3 mm (4.6 ± .1 in)

(L) ... 74 ± 3 mm (2.9 ± .1 in)

(M) ... 74 ± 3 mm (2.9 ± .1 in)

(N) ... 123 ± 3 mm (4.8 ± .1 in)

(O) ... 151 ± 3 mm (5.9 ± .1 in)

(P) ... 176 ± 3 mm (6.9 ± .1 in)

(Q) ... 194 ± 3 mm (7.6 ± .1 in)

(R) ... 213 ± 3 mm (8.4 ± .1 in)

(S) ... 225 ± 3 mm (8.9 ± .1 in)

(T) ... 255 ± 3 mm (10.0 ± .1 in)

(U) ... 439 ± 3 mm (17.3 ± .1 in)

(V) ... 454 ± 3 mm (17.9 ± .1 in)

(W) ... 550 ± 3 mm (21.7 ± .1 in)

(X) ... 575 ± 3 mm (22.7 ± .1 in)

(Y) ... 725 ± 3 mm (28.5 ± .1 in)

(Z) ... 742 ± 3 mm (29.2 ± .1 in)

NOTE: The 6V4980 Torque Screwdriver Tool Group is available for applying the correct torque.

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