Table 2. Exhaust System Troubleshooting Procedures

TM 9-2320-361-24-1

0006 00

MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)

Table 2. Exhaust System Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

CAUTION

2. EXHAUST COLOR WHITE

DURING NORMAL

Thick white smoke indicates

OPERATION AND IDLE

coolant in engine combustion

chambers. When this condition is

evident, shut the engine down

immediately and determine cause.

Continued engine operation may

result in permanent engine

damage.

Check engine temperature. Ensure

If engine temperature is above

engine temperature is at specified

correct operating level. See

level (TM 9-2320-361-10).

(WP 0006 00, table 4,

malfunction 1).

1. Inspect turbocharger for secure

If turbocharger mountings are

3. EXCESSIVE EXHAUST

mounting and exhaust leaks.

loose, tighten 2327 lb-ft

NOISE

(3137 Nm).

2. Inspect exhaust pipes for secure

Replace damaged parts

connections, cracks, breaks, and

(WP 0073 00). (For M50A3 series

excessive rust.

vehicles, refer to WP 0074 00.)

3. Inspect exhaust stack for secure

Replace damaged parts

connections, cracks, and breaks.

(WP 0073 00). (For M50A3 series

vehicles, refer to WP 0074 00.) If

excessive exhaust noise still exists,

it may be necessary to install an

exhaust insulator kit 12300664.

4. Inspect exhaust manifold for

Repair or replace exhaust system

damage or loose bolts

(WP 0073 00). (For M50A3 series

vehicles, refer to WP 0074 00)..

vehicles, refer to WP 0074 00).

1. Inspect exhaust manifold,

Replace damaged parts

4. EXHAUST FUMES IN CAB

turbocharger, exhaust pipes, and

(WP 0073 00). (For M50A3 series

connections for leaks.

vehicles, refer to WP 0074 00.)

Table 3. Manifold Heater System Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Check manifold heater system

Repair or replace electrical circuit.

ENGINE CRANKS BUT WILL

electrical circuit (WP 0015 00,

NOT START IN COLD

table 1, malfunction 1).

WEATHER (FUEL SYSTEM

OPERATING PROPERLY)

2. Check fuel pump, supply lines,

Repair or replace damaged fuel

and filter for leaks, bends, kinks,

components.

and restrictions. If vehicle is

equipped with alcohol

evaporator, check for proper

operation as required

(TM 9-2320-361-10).

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