89 TransAlp Manual Cooling System 5 5

COOLING SYSTEM

COOLING SYSTEM

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THERMOSENSOR

REMOVAL

Drain the coolant (page 5-3).

Disconnect the wire from the thermosensor.

Remove the thermosensor.

Suspend the thermosensor in 50/50 mixture of distilled water and ethylene glycol.

Heat the water gradually and measure the resistance.

NOTĘ

• If the thermosensor touches the pan, you'll get a false read-ing.

Data:

Temperaturo (^0C/°F)	50/122	80/176	120/248
Resistance (f2)	153.9	51.9	16.1

INSTALLATION

Apply sealant to the threads of the thermosensor and tighten the thermosensor to the thermostat housing.

NOTĘ

• Do not apply sealant to the area 2 — 3 mm from the end of the threads of the sensor.

Connect the thermosensor wire to the thermosensor. Fili the cooling system (page 5-3).

THERMOSTATIC SWITCH

The thermostatic switch senses the temperaturo of the radiator coolant.

The fan motor comes on at 98°- 102°C (208°-216°F) and stops at below 93°-97°C (199°-207°F).

Remove the radiator cap and check the coolant level.

In case the fan motor does not move, disconnect the connec-tors from the thermostatic switch and jump the connectors using a jumper wire.

If the fan motor moves with the ignition switch "ON", the thermostatic switch is faulty.

INSPECTION

Remove the thermostatic switch and suspend it in 50/50 mix-ture of distilled water and ethylene glycol.

Heat the coolant gradually and check the thermostatic switch for continuity at 98°-102°C (208°-216°F).

Cool the heated coolant gradually and check the thermostatic switch for no continuity at 93°—97°C (199°-207°F>. Apply sealant to the switch thread and install it.

TOROUE: 18 N-m (1.8 kg-m. 13 ft-lb)

(1) THERMOSTATIC SWITCH

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