3408 & 3408B DIESEL TRUCK ENGINE Caterpillar


Fuel Injection Nozzles And Adapters

Usage:



Engines With 7000 Series Nozzles

Later Engines

(1) Torque for fuel injection line nut ... 40 ± 7 N·m (30 ± 5 lb.ft.)

(2) Torque for retainer ... 48 ± 7 N·m (35 ± 5 lb.ft.)

(3) Torque for bleed screw ... 2.2 ± 0.8 N·m (20 ± 7 lb.in.)

Always use a new washer (seal) anytime the bleed screw is loosened or removed.

(4) Washer. Make sure the correct washer is used when the nozzle assembly is installed.

(5) Put liquid soap on rubber O-ring and bore in head before assembly.

(6) Put 5P3931 Anti-Seize Compound on the threads of the adapter before installation. Torque for the adapter ... 205 ± 14 N·m (150 ± 10 lb.ft.)

See Testing And Adjusting section, for fuel injection nozzle test procedure.

Earlier Engines

(1) Nut for fuel line.

Hold adapter assembly (2) when nut (1) is loosened or tightened. Torque for the nut ... 40 ± 7 N·m (30 ± 5 lb.ft.)

(2) Adapter assembly.

(3) Torque for bleed screw ... 1.6 ± 0.4 N·m (14 ± 4 lb.in.)

Always use a new washer (seal) anytime the bleed screw is loosened or removed.

(4) Washer. Make sure the correct washer is used when the nozzle assembly is installed. Check the Engine Arrangement for the correct part number to use.

(5) Torque for clamp bolt ... 31 ± 7 N·m (23 ± 5 lb.ft.)

(6) Put liquid soap on rubber O-ring and bore in head before assembly.

(7) Put 5P3931 Anti-Seize Compound on the threads of the adapter before installation. Torque for the adapter ... 205 ± 14 N·m (150 ± 10 lb.ft.)

Engines With Capsule-Type Nozzles

Earlier Engines

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

(2) Torque for nuts that hold the nozzles ... 75 ± 7 N·m (55 ± 5 lb.ft.).

(3) Body.

(4) Nozzle. Tighten nozzle finger tight on body (3).

(5) Put liquid soap in the bore in the cylinder head and on the O-ring seal. Put 5P3931 Anti-Seize Compound on the threads before installation. Torque for earlier direct injection adapter ... 205 ± 14 N·m (150 ± 10 lb.ft.).

Later Engines

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

(2) Bolt. Tighten the four clamp bolts as follows:

Tighten the bolts for the first clamp to a torque of ... 31 ± 7 N·m (23 ± 5 lb.ft.)

Tighten the bolts for the other clamp to a torque of ... 31 ± 7 N·m (23 ± 5 lb.ft.).

Again tighten the bolts for the first clamp to a torque of ... 31 ± 7 N·m (23 ± 5 lb.ft.)

(3) Clamp.

(4) Sleeve.

(5) Body.

(6) Nozzle. Tighten nozzle finger tight on body (3).

(7) Put liquid soap in the bore in the cylinder head and on the O-ring seal. Put 5P3931 Anti-Seize Compound on the threads before installation. Torque for later direct injection adapter ... 135 ± 7 N·m (100 ± 10 lb.ft.)

Precombustion Chamber Engines

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

(2) Torque for nuts that hold the nozzles ... 75 ± 7 N·m (55 ± 5 lb.ft.)

(3) Body.

(4) Nozzle. Tighten nozzle finger tight on body (3).

(5) Put liquid soap in the bore in the cylinder head and on the O-ring seal. Put 5P3931 Anti-Seize Compound on the threads before installation. Torque for precombustion chamber ... 205 ± 14 N·m (150 ± 10 lb.ft.)

(6) Torque for glow plug ... 13.6 ± 2.7 N·m (120 ± 24 lb.in.)

Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.