89 TransAlp Manual Cooling System 5 1

SERN/ICE INFORMATION	5-1
TROUBLESHOOTING	5-1
SYSTEM TESTING	5-2
COOLANT REPLACEMENT	5-3
THERMOSTAT	5-3

SERUICE INFORMATION

GENERAL

5. COOLING SYSTEM

THERMOSENSOR	5-5
THERMOSTATIC SWITCH	5-5
RADIATOR	5-6
WATER PUMP	5-8
RESERN/E TANK	5-10

Awarning

• Do not remove the radiator cap w hen the engine Is hot. The cooiant Is under pressure and severe scalding could result. The engine must be cool before sereicing the cooling system.

• Use only distilled water and ethylene glycol in the cooling system. A 50/50 mixture is recommended for maximum corro-sion protection. Do not use alcohol-based antifreeze.

• Add cooiant at the reserve tank. Do not remove the radiator cap except to refill or drain the system when the system is cool.

• Ali cooling system service can be done with the engine in the frame.

• Avoid spilling cooiant on painted surfaces.

• After servicing the system, check for leaks with a cooling system tester.

SPECIFICATIONS

ITEM		SPECIFICATIONS
Radiator cap relief pressure		88-127 kPa (0.9-1.3 kg/cm², 13-18 psil
Freezing point (Hydromctor testl:		55% Distilled water + 45% ethylene glycol: -32°C <-25°F) 50% Distilled water + 50% ethylene glycol: -37°C (-34°F) 45% Distilled water + 55% ethylene glycol: -44.5°C (-48°F)
Cooiant capacity: Total system		1.75 liters (1.85 US qt. 1.54 Imp qt)
Thermostat		Begins to open: 80° to 84°C (176° to 183°F> Valve lift: Minimum of 8 mm at 95°C I0.3 in at 203°F)
Boiling point (with 50/50 mixture):		Unpressurized: 107.7°C \|226°F) Cap on, pressurized: 125.6°C (258°F\|
Thormosensor	temperaturę	50°C I122°F)	80°C (176°FI	120°C (248°F)
	resistanco	153.9 »	51.9 0	16.1 n
Thermostatic switch		Comes into action: 98° to 102°C 1208° to 216°F) Stops: be Iow 93°-97°C (199°-207°F)

TORCHJE VALUES

Thermostatic switch 18 N«m (1.8 kg-m, 13 ft-lb)

Gearshift pedał 10 N*m (1.0 kg-m, 7 ft-lb)

TROUBLESHOOTING

Engine temperaturo too high

• Faulty temperaturę gauge or gauge sensor

• Thermostat stuck closed

• Faulty radiator cap

• Insufficient cooiant or cooiant level too Iow

• Passages blocked in radiator, hoses or water jacket

• Cooling fan motor does not turn

— Broken or loose sub fuse.

— Faulty fan motor

— Faulty thermostatic switch

— Poorly contact or open Circuit in harness

• Faulty water pump

Engine temperaturę too Iow

• Faulty temperaturę gauge or gauge sensor.

• Thermostat stuck open

Cooiant leaks

• Faulty pump mechanical seal

• Deteriorated O-rings

5-1