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(8) With the front clutch plate assembly tight against the shims, measure the air gap between ar- (9) Install compressor shaft nut. Tighten nut to 17.5 N Im (155 in. lbs.) torque. Shims may compress after tightening shaft bolt. Check air gap in four or more places to verify if air (10) Install the compressor onto the mount. CLUTCH/COIL BREAK-IN After a new clutch/coil has been installed, cycle the A/C clutch 20 times (5 sec. on and 5 sec. off). During THERMAL LIMITER SWITCH The Thermal Limiter Switch (Fig. 5) is bolted to the side of the compressor case. It measures compres- This switch is NOT USED to cycle the clutch coil. After the compressor has cooled to normal operating DIAGNOSIS The switch can remain bolted to the compressor for testing. (1) Disconnect the wiring connectors from the ther- mal limiter switch. (2) Using an ohmmeter, check for continuity be- tween the two wiring leads. If continuity is not de- replace switch. Also check for possible compressor overheating. 63°C (255°F 637°F). • Switch cuts back in (continuity) at 110°C 66°C 642°F). REMOVAL The refrigerant system can remained fully charged for thermal limiter switch replacement. After removing the thermal limiter switch, always replace with a new unit. (1) Disconnect wiring connectors from switch. clamp and the switch to the side of the compressor (3) Pry the switch from compressor case with a screwdriver. CLEANING Remove silicone filler from the socket and thor- oughly clean the socket with thinners. INSTALLATION (1) Place the new thermal limiter switch so that the flat copper surface faces upward. (2) Apply the specified silicone filler (KE 347 RTV) to the flat copper surface until the surface is evenly (3) Install the thermal limiter switch into the socket and secure it with the thermal protector (lim- Fig. 4 Measuring Air Gap Fig. 5 Thermal Limiter Switch 24 - 34 HEATING AND AIR CONDITIONING Ä |