MAC TOOLS MW250 Instruções de Operação descarregar pdf (Página 78)

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TM 5-4310-452-14

Table 4-2. Mechanical Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE

1. WILL NOT START.

Check to see if fuel filter is clogged.

Replace fuel filter element (see paragraph 4-26).

2. DIFFICULT TO START/PERFORMS POORLY.

Step 1. Check to see if fuel is forming wax (winter operation).

Replace with winter-grade fuel (see paragraph 2-20).

Step 2. Check for erratic or insufficient fuel supply.

Bleed fuel system (see paragraph 4-21).

Step 3. Check for proper valve clearance.

Adjust valve clearance (see paragraph 4-13).

3. EXHAUST SMOKES EXCESSIVELY.

Check for proper valve clearance,

Adjust valve clearance (see paragraph 4-13).

4. TURNS OFF PREMATURELY.

Step 1. Check to see if engine idle speed is too low.

Adjust throttle control (see paragraph 4-25).

Step 2. Check for any broken or loose electrical connections.

Test and tighten loose electrical connections.

Step 3. Check for faulty compressor oil temperature or engine oil pressure shutdown switch.

Locate faulty switch and replace.

5. VIBRATES EXCESSIVELY.

Step 1. Check to see if engine idle speed is too low.

Adjust throttle control (see paragraph 4-25).

Step 2. Check for proper valve clearance.

Adjust valve clearance (see paragraph 4-13).

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