TM 5-6115-545-12TO 35C2-3-444-1NAVFAC P-8-826-12TM 00038G-12~. ThermostatTesting. To test thermostat(8),proceedas follows:(1) Suspendthermostat (8) in a container ofCleanwater.Thermostat mustbe completely inlnler-sed but not touchingbottom of contmner.(2) Heatwatergraduallyandstir so heat isevenlydistributed.(3) Checktemperature of waterwithreliablethermometer.DO notoverheat,Observethermostat (8) as temperatureincreases. If thethermostatis functioningpro~erly it shouldbeginto openbetween175°Fto 182 F and be fullyopenat 205°F.(4) Thethermostat (8) M not adjustable.If it does not operatewithin the abovelit-nits, it shouldbe replaced.$. TemperatureTransmitterTesting. To testthetransmitter(10),proceedas follows:of clean (la)ektspend transmitter (1 O) in a container. Transmittershouldbe insertedsothatsensingelementis completely’ imn)ersed butconnectorendM out of water.(2) Connect ohmmeterbetween singlecon-ductorandcase.Heatwatergraduallyand stirsoheatis evenlydistributed,(3) Checktemperature of waterwithrelia-ble thermometer. Do not overheat.Observeohm-meteras temperature increases. If the transmitter(10)is functioningproerly,the resistanc~ shouldreadbetween 2100 and 2600 ohmsat 1200F andbe-tween 680 and745 ohmsat 2000F.Section XXXIX. CRANKSHAFT PULLEY3-210. General.a. Thecrankshaftpulley is moumed on the fronteflofthecrankshaftand M usedto transferdrivepowerfromthe crankshaft to beltdr]venaccessor-ies such as thewaterpump, fan and alternator.p.Vibrationdampenihgis accomplished by bond-inganeoprenecompound between the crankshaftpulleyand the crankshafthub.(4) Thetransmitter(10) is not repamable.If it does not indicate a resistancewithin the aboverange,it shouldbe replaced.~. T~. To test theswitch(12).proceedas follows:(1) Suspendswitch(12) in a containerofantifreeze compound. Switchshouldbe inserted sothatsensingelement is completelyimmersedbut con-nectorendis out of compound.(2) Heatcompoundgradual] y and stir soheatis evenlydistributed.(3) Checktemperature of compound withreliablethermometer.Do not overheat.(4) Useohmmeter and checkcontinuitybetween pinsA andD andalsobetweenpinsB andC. Under 217°FS3°F.contactsA and D shouldindicatea closedcircuitand contactsB andC an opencircuit.(5) Theswitch(12)is not repairable.If it does not operatewithin the abovelimits itshouldbe replaced.g. Installation.Seefigure 3-44 and installthermostat(8),transmitter (]0),and suitch(12).Fillradiatorwithcoolantin accordancewithtable 2-1.AND VIBRATION DAMPENER3-211. Inspection.a. Inspectpulleybeltgroovesfor stepwearaloiii sidesand bottomof groove.indicatingex.cessive wear,b. Inspectpulleybeltgroovesaround totalcircumference of pulleyfor cracksor distortion.~. Inspecthubarea for cracks.Section XL. IDLER PULLEY AND MOUNTING BRACKET3-212. General.bracket,the bracketitselfis moveable andcan bepositionedto increaseor decreasetensionof thea. Theidlerpulleyprovidescapability to adjustenginedrivebelts.ten%ionof theenginedrivebeltsforthe fanand thewater pump.3-213.~. The idler pulley is mounted on it bracket, withan adjustment slot, located on the front of the engine.While the idler pulley is mounted m place on theSee3-106Change 18Inspection, Removal and Installation.figure 3-45 and proceed as follows:
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