TM 9-2350-287-20-17-37. ENGINE COOLANT HIGH TEMPERATURE SWITCH REPLACEMENT.This Task Covers:a. Removalb. InstallationInitial Setup:Tools/Test Equipment:Equipment Conditions:l General mechanic’s tool kit (Item 24,l Vehicle parked on level ground (refer toAppendix l)TM 9-2350-287-10).l Air intake grille opened and locked in positionMaterials/Parts:(refer to TM 9-2350-287-10).l Teflon pipe sealant (Item 63, Appendix D)a.REMOVALWARNINGEngine must be cool before removing engineRemoval of switch from hot engine will allowreceptacle, possibly causing severe burns.NOTEcoolant high temperature switch.hot coolant to spurt from switchWorking temperature range of switch is 218° to 232°F.1.Disconnect wire 509A from electrical connector (1) of engine coolant high temperature switch (2).NOTEWhen switch is removed, coolant will drain through switch mounting opening.Replacement switch should be installed immediately to prevent loss of coolant.2.Unscrew and remove switch (2) from vehicle.b.INSTALLATION1.Apply Teflon pipe sealant to threads of switch (2), and install switch (2) in vehicle.2.Connect wire 509A to electrical connector (1) of switch (2).7-104
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