G 50/G 70/G 85 Maintenancewc_tx000484gb.fm 514.6 Engine CoolantCheck the coolant level of the radiator with the engine cold. After initialfilling of radiator to 3/4" below bottom of filler neck, maintain properlevel in overflow bottle daily.NEVER remove radiator cap or drain plug while engine is hot!Pressurized coolant can cause serious burns.Shut off engine. Only remove radiator cap when it is cool enough totouch with bare hands. Slowly loosen cap to relieve pressure first,before removing it completely.Solutions of antifreeze and supplemental coolant additives MUST beused year-round. Automotive-type coolants do not contain the correctcoolant additives to protect heavy-duty diesel engines. They oftencontain a high concentration of silicates which can damage the engineand cooling system. Refer to engine Operator’s Manual for coolantrecommendations.4.7 Trailer MaintenanceTires - Keep tires inflated to the proper pressure as shown on the tiresidewall, and check tread periodically for wear. Replace tires asrequired.Wheels - Check that lug nuts holding wheels are tight. Replace anymissing nuts immediately.Axle Hubs - Grease axle hubs through grease fittings using a goodwheel bearing grease.Brakes - Check operation of brakes before each trip.Check level of brake fluid in actuator at front of trailer at regularintervals. Fill to approximately 1" below top of reservoir using DOT-3heavy-duty brake fluid. Tighten filler plug securely.Note: If fluid level has fallen too low, bleed brake lines to remove anyair trapped in lines.WARNING