REPLACEMENT - TM-55-1905-223-24-50084

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REMOVAL

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

Replace/Repair Thermostat Housing Group. (FIGURE 2-14)

TM 55-1905-223-24-5

Remove "Out of Service-Do Not Operate" tag.

NOTE

If coolant is added between drain intervals, additional coolant additive (DCA or equivalent)

could be required.

Before adding coolant the coolant additive concentration must be checked using the DCA

test kit and TB 55-1900-207-24.

Add coolant as required using a minimum concentration of one DCA unit for each U.S. gallon

(3.8 litre) of cooling system capacity.

NOTE

One DCA unit equals 1.5 dry ounces (42 grams) or 4.0 fluid ounces (118 millilitres).

CAUTION

Do not use more than two DCA units per U.S. gallon (3.8 litre) as overconcentration will

cause sludge in cooling system.

Ensure the proper coolant filter is installed to maintain the correct DCA concentration in the

system.

NOTE

Service filters are satisfactory for use with maintenance intervals from 250 to 600 hours.

DCA is compatible with all permanent type antifreeze except Methoxy Propanol. If using

Methoxy Propanol antifreeze reduce the amount of DCA by 1/3 to prevent inhibitor loss.

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