MAC TOOLS MW250 Provozní pokyny stáhnout pdf (Strana 306)

100

101

TM 5-4310-452-14

5-14. TIMING GEARS REPLACEMENT.

This Task Covers:

a. Removal b. Installation

Initial Setup:

Equipment Conditions: Materials/parts:

• Engine set to top dead center (see paragraph • One preformed packing

5-4) •·Three lockwashers

• Front cover removed (see paragraph 5-6)

Tools/Test Equipment:

• General mechanic's tool kit

• Arbor press

a. REMOVAL

IDLER GEAR

1. Remove allen head screw (5) from idler gear (4).

2. Remove idler gear (4).

3. Using an arbor press, remove sleeve bushing (3) from idler gear (4).

4. Remove sleeve bushing (1) from roller journal bearing (2).

INJECTION PUMP DRIVE GEAR

1. Remove 3 bolts (8), lockwashers (7), and washers (6) from drive gear (11) and body hub (12). Discard lockwashers.

2. Remove nut (9), washer (10), drive gear (11), body hub (12), and preformed packing (13) from fuel injection pump

(14). Discard preformed packing.

b. INSTALLATION

INJECTION PUMP DRIVE GEAR

1. Position new preformed packing (13), body hub (12), and drive gear (11) in place on fuel injection pump (14).

2. Install, but do not tighten, nut (9) and washer (10).

3. Install 3 bolts (8), new lockwashers (7), and washers (6) in drive gear (11) and body hub (12). Tighten nut (9).

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