Lubrication & Maint./2000 Hour/24 Month 16. Inspect the fan belt for wear and check belt tension. (See Checking Belt Tensioner Spring Tension and Belt Wear in Lubrication and Maintenance 500 Hour/12 Month section. OURGP11,0000221 –19–15OCT03–4/4 Testing Thermostats Opening Temperature To Remove Thermostat(s) CAUTION: Explosive release of fluids from pressurized cooling system can cause serious burns. DO NOT drain coolant until it has cooled below operating temperature. Always loosen radiator pressure cap or drain valve slowly to relieve pressure. TS281 –UN–23AUG88 1. Visually inspect area around thermostat housing for leaks. High Pressure Fluids 2.
Remove radiator pressure cap and partially drain cooling system. 3. Remove thermostat cover-to-coolant pump tube (A) and seal. RG8115A –UN–15JAN98 A—Cover-To-Coolant Pump Tube Thermostat Cover-to-Coolant Pump Tube DPSG,RG34710,112 –19–23NOV01–1/5 4. Remove thermostat cover (B) with gasket. 5. Remove thermostat(s) 6. Remove and discard all gasket material. Clean gasket surfaces. RG7921A –UN–13NOV97 7. Clean and check cover for cracks or damage. B—Thermostat Cover Thermostat Cover Continued on next page DPSG,RG34710,112 –19–23NOV01–2/5 35-6 021604 PN=164