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 TM 55-1905-223-24-5
2-24. Replace/Repair Thermostat Housing Group. (FIGURE 2-14)
This task covers:
a. Removal
b. Inspection
c. Repair
d. Replacement
INITIAL SETUP:
Tools
Equipment Condition
Thermostat seal mandrel
Engine shut down, cooled to below 120
F
P/N ST-1225, ST-1226
(50 ) (TM 55-1905-223-10).
C
Tool kit, general mechanic's
Engine tagged " ut of Service-Do Not
O
rail and marine diesel engines,
Operate"
Torque wrench (30-300 in-lb),
5120-01-092-3278
Torque wrench (30-300 ft-lb),
5120-01-125-5190
Materials/Parts
Nonmetallic hose P/N 3056139
Gasket P/N 3009457, 208128 and 3019158
Thermostat housing seal P/N 186780
Flow control thermostat P/N 201737
Preformed packing P/N 43463-A
Cleaning solvent, Item 5, Appendix C
Wiping rag, Item 2, Appendix C
Warning tag, Item 25, Appendix C
REMOVAL
WARNING
Wait until the water temperature is below 120 (50 ) before removing the cooling
F
C
system pressure cap. Failure to do so can cause personal injury from the hot coolant.
a.
Removal of Thermostat Only.
(1)
Drain the cooling system. Refer to PMCS Table 2-1, Item 21.
(2)
Remove pipe plug (24) located on the thermostat housing (19), to drain the excess
water.
(3)
Disconnect hose clamp (2) on the water outlet connection (4).
(4)
Loosen hose clamps (20) and disconnect hose (21).
Change 1
2-65
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