MAC TOOLS MW250 Instrucciones de operaciones descargar pdf (Pagina 316)

TM 5-4310-452-14

5-20. FUEL INJECTION PUMP REPLACEMENT.

This Task Covers:

a. Removal b. Installation

Initial Setup:

Equipment Conditions: Materials/Parts:

• Metering fuel pump removed (see para- • One preformed packing

graph 4-22). • One self-locking nut

• Solenoid valve removed (see paragraph 4-59). • Four lockwashers

Idler pulley assembly removed (see para-

graph 4-35) Tools/Test Equipment:

• Battery cables disconnected (see paragraph • General mechanic's tool kit

4-57).

a. REMOVAL

1. Remove screw (35), self-locking nut (33), and air cylinder assembly rod end (34) from throttle control lever (31).

Discard self-locking nut.

2. Remove nut (29), lockwasher (30), and spring rod ball joint (32) from throttle control lever (31). Discard lockwasher.

3. Remove 2 capscrews (28) and engine stop cable bracket (27) and clamp (26) from engine block.

4. Loosen screw (24) and remove engine stop cable (25) from pin (23).

5. Remove fluid passage bolt (17), 2 washers (18), and oil line (16) from fuel injection pump (4).

6. Remove fuel injector lines (3) from fuel injection pump (4).

7. Remove fluid passage bolts (1 and 21) and 4 washers (2 and 19) from fuel lines (20 and 22) and fuel injection pump

(4).

8. Set No. 1 piston at top dead center (see paragraph 5-4).

9. Remove 3 bolts (10), lockwashers (9), and washers (8) from injection pump drive gear (7). Discard lockwashers.

10. Remove 4 nuts (15), washers (14), fuel injection pump (4), and preformed packing (5). Discard preformed

packing.

11. Remove nut (11), washer (12), and hub (6) from fuel injection pump (4).

b. INSTALLATION

1. Install hub (6) on fuel injection pump (4) with washer (12) and nut (11).

2. Aline slotted holes of fuel injection pump (4) with engine center studs (13), and install fuel injection pump and new

preformed packing (5) with 4 nuts (15) and washers (14).

3. Position injection pump drive gear (7) in place on fuel injection pump (4) and install 3 bolts (10), new lockwashers (9),

and washers (8).

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MAC TOOLS MW250 Instrucciones de operaciones Pagina 316