STARTING AND OPERATING 117 I DLE S HUTDOWN O PERATING P RECAUTIONS C OOLING S YSTEM T IPS This feature can be enabled so that the truck will automatically shutdown when the truck has been idling for a set period of time when the engine is at operating temperature. Idle time can be set in 5minute increments between 5 and 60minutes. See an authorized dealer to enable this feature. Avoid Overheating The Engine To reduce potential for engine and transmission overheating in high ambient temperature conditions, take the following actions: The temperature of the engine coolant (antifreeze:
a mixture of 50% ethylene-glycol and 50% water) must not exceed the normal range of the temperature gauge 240°F (116°C) with a 21 psi (145 kPa) coolant pressure cap. City Driving — When stopped, shift the transmis sion into NEUTRAL and increase engine idle speed. NOTE: The idle shut down timer is disabled while the PTO (Power Take-off) is active. P ROGRAMMABLE M AXIMUM V EHICLE S PEED Usually the engine coolant (antifreeze) temperature indicated during operation will be to the left of center in the normal range of the gauge. Avoid Low Coolant Temperature Operation Highway Driving — Reduce your speed. Up Steep Hills — Select a lower transmission gear.
4 Continual operation at low engine coolant (antifreeze) temperature below the normal range on the gauge 140°F (60°C) can be harmful to the engine. Low engine coolant (antifreeze) temperature can cause incomplete combustion which allows carbon and varnish to form on piston rings and injector nozzles. Also, the unburned fuel can enter the crankcase, diluting the lubricating oil and causing rapid wear to the engine. Air Conditioning — Turn it off temporarily. Do Not Operate The Engine With Low Oil Pressure This feature allows the owner to set a maximum vehicle speed for the vehicle. The 2500 and 3500 Series maximum vehicle speed can be set between 40mph to 87mph (64km/h to 140km/h).
The 4500/5500 Series maximum vehicle speed can be set between 40mph to 85mph (64km/h to 136km/h). See an authorized dealer to enable this feature. When the engine is at normal operating temperature, the minimum oil pressures required are: NOTE: DO NOT set the maximum vehicle speed to a value greater than what the vehicle tires are rated for. If oil pressure falls to less than normal readings, shut the engine off immediately. Failure to do so could result in immediate and severe engine damage. CAUTION! Idle 700 to 800 RPM 10 psi (69 kPa) Full speed and load 30 psi (207 kPa)