Replace/Repair Seawater Pump/Belt Guard Group. (FIGURE 2-48)

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INSPECTION

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

FIGURE 2-48. Seawater Pump Group

TM 55-1905-223-24-5

2-37. Replace/Repair Seawater Pump/Belt Guard Group. (FIGURE 2-48)

This task covers:

a. Inspection

b. Adjustment

c. Removal

d. Repair

e. Replacement

INITIAL SETUP:

INITIAL SETUP

Tools

Equipment Condition

Tool kit general mechanic's

Engine shut down (TM 55-1905-223-10).

rail and marine diesel engines,

External seawater inlet and outlet

valves closed (TM 55-1905-223-24-18).

Combination wrench set,

Power take-off assembly removed

metric 10mm to 24mm,

5720-01-046-4979

Belt tension gauge, P/N ST-1293

Torque wrench, 5120-01-125-5190 (ft-lb)

Materials/Parts

Nonmetallic hose P/N 67185

Vee belt P/N 178691

Engine cooling system pump P/N 3010328

INSPECTION

Use a belt tension gauge to visually inspect the seawater pump and connections for signs of loose fittings,

corrosion, and leaks. Inspect for belt alignment, pulleys should not exceed 1/6 inch per foot (0.5 mm per cm) of

distance between pulley centers.

ADJUSTMENT

a. Remove mechanical guard (8) by removing hexhead capscrew (5), lockwasher

(6) and flatwasher (7).

b. Loosen capscrews (9) holding the pump (13) to the seawater bracket (10).

c. Use a pry bar between the pump (13) and the engine to hold tension on the

belt (3).

d. Tighten capscrews (9) to secure the pump (13) in position. Torque to 35 ft-

lb.

e. Test belt tension with belt tension gauge. It should read 150 to 160 ft-lbs

for new belts and 70 to 120 ft-lbs for used belts. Adjust if necessary.

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