FIGURE 2-8. Mercury Manometer Installation

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FIGURE 2-6. Injector Adapter Check

TM-55-1905-223-24-5 Bowthruster Engine for Landing Craft Utility (LCU) NSN 1905-01-154-1191 Manual

Low power or excessive smoke (low intake manifold pressure)

TM 55-1905-223-24-5

Table 2-2. Troubleshooting-CONT

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

NOTE

The gauge adapter must be installed at a 90-degree angle to the air flow in a straight

section of pipe, one pipe 4" before the turbocharger.

Operate the engine at full throttle and rated RPM with maximum load.

Record the reading on the gauge or manometer.

NOTE

Restriction must not exceed 25.0 inches H20 (635 cm H20).

If the restriction exceeds specifications, do the following:

(1)

Replace or clean the air filter element (para. 2-25).

(2)

Visually inspect the intake air piping for damage.

Remove the test equipment.

STEP 4. Check for excessive exhaust restriction as follows:

Install a mercury manometer in the exhaust piping (FIGURE 2-8).

FIGURE 2-8. Mercury Manometer Installation .

NOTE

The mercury manometer must be installed near the turbocharger or exhaust manifold in

a straight section of pipe.

Operate the engine at 1500 RPM and record the manometer reading.

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