ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
f.
Unscrew temperature sender (4.) from engine head.
2-108.3 Cleaning and Inspection.
a.
Shut down generator set.
b.
Remove coolant temperature sender, paragraph 2-108.2.
WARNING
Dry cleaning solvent Is flammable and toxic to eyes, skin, and respiratory tract. Skin/eye
protection required. Avoid repeated/prolonged contact. Good general ventilation is normally
adequate.
WARNING
Use low pressure air, 15 psi maximum. Wear protective glasses when using compressed air.
Failure to follow this warning could result in severe personal injury.
c.
Clean temperature sender with dry, filtered compressed air and cleaning both (Item 8, Appendix C) lightly
moistened with dry cleaning solvent (Item 20, Appendix C).
d.
Inspect temperature sender for cracked casing, corrosion, and damaged threads and connector.
e.
If no repair is needed, install coolant temperature sender, paragraph 2-108.4.
2-108.4 Installation.
a.
Install coolant temperature sender (4., FIGURE 2-30) in engine head.
b.
Connect electrical lead and dose left side engine access doors.
c.
Connect negative battery cable and dose battery access door.
2-109
COOLANT HIGH TEMPERATURE SWITCH.
2-109.1 Testing.
a.
Shut down generator set.
b.
Remove coolant high temperature switch, paragraph 2-109.2.
c.
Suspend high temperature switch in a container of 50/50 mixture of antifreeze and water so that sensing
element is completely immersed but not touching sides or bottom of container.
d.
Suspend a reliable thermometer in container. Do not allow end of thermometer to rest on bottom of
container.
e.
Set multimeter for ohms and check for continuity between switch terminals. Switch operates under open
conditions.
f.
Gradually heat antifreeze/water mixture, stirring so that heat will be evenly distributed and observe
thermometer and multimeter.
g.
At between 220 and 230 °F (101 and 1070C) multimeter should indicate continuity.
h.
Replace high temperature switch if it fails to operate as above.
i.
If replacement is not needed, install coolant high temperature switch, paragraph 2-109.4.
Change 3 2-143
