ORIFICE TUBE ASSEMBLY REPLACEMENT

TM 9-2320-366-20-3

4-7. ORIFICE TUBE ASSEMBLY REPLACEMENT

This task covers:

a. Removal

c. Follow-On Maintenance

b. Installation

INITIAL SETUP

Equipment Conditions

Tools and Special Tools

Engine shut down (TM 9-2320-366-10-1).

Tool Kit, Genl Mech (Item 46, Appendix C)

Cab raised (TM 9-2320-366-10-1).

Wrench, Torque, 0-175 lb-ft (Item 58, Appendix C)

Fuel pressure regulating valve removed

Materials/Parts

Fuel ratio control tube removed (para 4-6).

Packing, Preformed (Item 209, Appendix G)

WARNING

Diesel fuel is flammable. If fuel is spilled,

clean it up immediately. Failure to comply

may result in serious injury or death to

personnel.

a. Removal.

(1) Remove two screws (1) and washers (2) from orifice

tube assembly (3).

(2) Remove screw (4), orifice tube assembly (3), and

preformed packing (5) from cylinder head (6). Discard

preformed packing.

b. Installation.

(1) Position preformed packing (5) on cylinder head (6).

(2) Position orifice tube assembly (3) on cylinder head (6)

with screw (4).

(3) Position two washers (2) and screws (1) in orifice tube

assembly (3).

(4) Tighten screw (4) to 15-25 lb-ft (20-34 Nm).

(5) Tighten two screws (1) to 33-47 lb-ft (45-64 Nm).

4-40