Excessive exhaust back pressure

Custom Search

Breather restriction

TM-55-1905-220-14-3 Landing Craft Unit LCU 1671-1679 (1905-01-009-1056) Manual

Table 3-7. Propulsion Engine - Low Oil Pressure Troubleshooting

TM 55-1905-220-14-3

Table 3-6. Propulsion Engine - Excessive Crankcase Pressure

Troubleshooting (Cont).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Excessive exhaust back pressure.

Step 1.

Check for excessive muffler resistance.

Check the exhaust back pressure and repair or replace the muffler if an obstruction is found.

Refer to Direct Support Maintenance.

Step 2.

Check for faulty exhaust piping.

Check the exhaust back pressure. Refer to Direct Support Maintenance.

Table 3-7. Propulsion Engine - Low Oil Pressure Troubleshooting.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

NOTE

Make checks with minimum water outlet temperature of 160F (71C).

An alarm will sound in the pilot house.

Lubricating oil.

Step 1.

Check for suction loss.

Check the oil and bring it to the proper level on the dipstick.

Step 2.

Check lubricating oil viscosity.

Use the recommended grade and viscosity of oil.

3-49