SEAL-O-RING 5217421 - Caterpillar

The best way to determine the time to overhaul the engine is to use total fuel consumed, even if this figure is estimated. Fuel consumption more closely follows the load upon the engine. See your Caterpillar dealer for assistance in determining the time to overhaul your engine.The hours figure is an average value for a reasonable load. The hours figure will be too high if the engine is run at high load and too low if the engine is lightly loaded.Use the fuel consumption or service hour figure only as a guideline. Other factors, such as how conscientiously preventive maintenance has been performed, fuel quality, operating conditions, S O S results, etc., are important in deciding when to perform an overhaul, as well as some important economic points to keep in mind.To minimize downtime and provide the lowest cost and highest value, Caterpillar recommends that all engines be overhauled before failure by scheduling an overhaul.The "Guidelines For Reusable Parts and Salvage Operations" is part of an established Caterpillar parts reusability program. These guidelines were developed to assist Caterpillar dealers and customers to reduce costs by avoiding unnecessary expenditures for new parts when existing parts can be used as is, repaired or salvaged.If your parts comply with the established visual, dimensional, etc., inspection specifications expressed in the reusable parts guideline, then they should be reused. Parts complying with the specifications outlined in the reusable parts guideline will give an additional service life to the next overhaul without decreasing engine performance.Refer to the Service Manual for the disassembly and assembly procedures to perform the required maintenance as outlined in this section or contact your Caterpillar dealer for assistance.Your Caterpillar dealer can provide you with the necessary parts to rebuild the engine at the least possible cost. There may be options available such as the Remanufactured Core Program as well as individual parts for Top End and Overhaul parts replacement.* First perform previous service hour items including Top End. The recommendations for overhaul should be performed and include items listed in Top End maintenance.Replace
Cylinder PacksConnecting Rod BearingsMain BearingsCamshaft Bearings and FollowersRocker Arm BearingsAftercooler CoreAccessory Group BearingsFront Gear Train BearingsRear Gear Train BearingsCylinder Head ValvesCylinder Head Valve GuidesCylinder Head Valve Spring GuidesFuel Rack BearingsCrankshaft Thrust BearingsRebuild
Vibration DamperElectric Starter MotorsPrelube PumpWoodward ActuatorInspect - Replace if Necessary
CrankshaftCamshaftsValve Mechanism GroupFront Gear GroupRear Gear GroupExhaust ManifoldsShutoff Controls and AlarmsPriority ValveReplace Gaskets and Seals
Crankcase Side Cover GroupCentral Structure Cover GroupCamshaft Front Cover GroupCamshaft Drive Gear Cover GroupFront Housing GroupGear Inspection GroupRear Housing GroupRear Structure Cover GroupPower Take-Off Cover GroupPriority Valve GroupCrankshaftValve Mechanism Cover GroupOil LinesAll Water LinesOil CoolerVibration DamperFuel Lines