BUSHING 4245380 - Caterpillar

Severe Operation
Severe operation is the use of an engine that exceeds current published standards for that engine. Caterpillar maintains standards for the following engine parameters:
Horsepower
Range of rpm
Fuel consumption
Fuel quality
Altitude
Maintenance intervals
Selection of oil
Selection of coolant
Environmental qualities
Installation
Average startsRefer to the standards for your engine or consult your Cat dealer to determine if your engine is operating within the defined parameters.Severe operation can accelerate component wear. Engines that are operating under severe conditions may need more frequent maintenance intervals for the following reasons:
Maximum reliabilityBecause of individual applications, Identifying all the factors which can contribute to severe operation is not possible. Consult your Cat dealer about the maintenance that is needed for your specific engine.The following factors can contribute to severe operation: environment, improper operating procedures, and improper maintenance practices.Environmental Factors
Extreme Ambient Temperatures
Extended operation in environments that are cold or hot can damage components. Valve components can be damaged by carbon buildup if the engine is frequently started and stopped in cold temperatures. Hot inlet air reduces the performance capabilities of the engine.Note: See this Operation and Maintenance Manual, "Cold-Weather Operation" topic (Operation Section), or see Supplement, SEBU5898, "Cold-Weather Recommendations".Cleanliness
Unless the equipment is cleaned regularly, extended operation in a dirty environment and in a dusty environment can damage components. Built up mud, dirt, and dust can encase components. This buildup can make maintenance difficult. The buildup can contain corrosive chemicals. Corrosive chemicals and salt can damage some components.Improper Operating Procedures
Extended operation at low idle
Minimum cool down periods after high load factor operation
Operating the engine beyond the guidelines for the engine rating
Operating the engine at loads that are greater than the rated load
Operating the engine at speeds that are greater than the rated speed
Use of the engine for an application that is not approvedAverage Starts
Reducing engine idle time with a manual or automated strategy will increase the number of starts over the lifetime of an engine. Using a non-Cat approved system to reduce idle time can result in higher engine component wear that is associated with severe operation. Some components that would be included are camshafts and bearings. Engines installed in pressure pumping applications typically average less than one start for every 4 hours of operation. Exceeding this average over the lifetime of the engine is considered severe operation.Cat engines equipped with Cat Engine Idle Reduction Systems are validated to reduce fuel costs associated with engine idle and to maintain Overhaul service intervals outlined in this Operation and Maintenance Manual for pressure pumping applications.Improper Maintenance Practices
Extension of maintenance intervals
Not using recommended fuel, lubricants, and coolant/antifreezeOverhaul Information
An overhaul is replacing the major worn components of the engine. An overhaul interval is a maintenance interval that is planned. The engine is rebuilt with new parts or parts that have been rebuilt.An overhaul also includes the following maintenance:
Inspection of all the parts that are visible during the disassembly
Replacement of the seals and gaskets that are removed
Cleaning of the internal passages of the engine and the engine block
Inspecting the alignment of the driven equipmentMost owners will save