LINES GP-AFTERCOOLER AIR 2935007 - Caterpillar

Maintenance and operation practices affect component service life when operating the engine in severe service applications.The level of maintenance an engine receives is crucial to its service life. Other major factors affecting service life are operating speed and loads.The conditions that follow can indicate severe service operation.* Operation above 36 320 kg (80,000 lb) gross vehicle weight (GVW) and other high load factor operation such as off-highway* Frequent high altitude operation above 1525 meters (5000 ft)* Extended operation at low idle* Arctic operation [regular cold starts at temperatures below -18°C (0°F)]* Extending maintenance beyond the recommended maintenance intervals* Frequent hot shutdowns (minimum five minute cool down periods after high load factor operation)Unit Injectors
Fuel quality (amount of water, solid contaminants, etc) and the quality of filtration will affect unit injector wear. Normal unit injector wear may accelerate when the engine operates in a severe application.This wear can result in elevated exhaust emission levels (black smoke, etc) and/or poor engine performance. Single cylinder misfire is not typically attributed to normal wear and can be repaired by replacing the faulty unit injector.
The engine will be damaged if a defective unit injector is used because of the shape of fuel (spray pattern) that is injected into the cylinder will be incorrect.
Severe service operation may create the need for evaluation of all unit injectors prior to overhaul. The conditions that follow can indicate severe service operation.* Use of fuels NOT recommended by Caterpillar in the Fuel Specifications* Extreme (high or low) ambient temperature conditions (when fuel lubricating properties can diminish)* Frequent fuel filter plugging* Extended fuel system maintenance intervals* Inadequate fuel tank/storage tank maintenance (excessive water, sediment or microorganism growth, etc.