GEAR 4395926 - Caterpillar

Unit Fuel Injector
Clean the fuel injector body and replace the O-rings. Replace the O-rings and the gasket on the injector sleeve. Clean the area around the injector seating in the injector sleeve. Refer to the Service Manual for the complete procedure, or consult with your Caterpillar dealer for assistance.Rebuild or Exchange
Cylinder Head Assembly, Connecting Rods, Pistons, Cylinder Liners, Turbocharger, Cylinder Packs, Oil Pump, and Fuel Transfer Pump
These components should be inspected according to the instructions that are found in various Caterpillar reusability publications. The Special Publication, SEBF8029 lists the reusability publications that are needed for inspecting the engine parts.If the parts comply with the established inspection specifications that are expressed in the reusable parts guideline, the parts should be reused.Parts that are not within the established inspection specifications should be dealt with in one of the following manners:
Salvaging
Repairing
ReplacingUsing out-of-spec parts can result in the following problems:
Unscheduled downtime
Costly repairs
Damage to other engine parts
Reduced engine efficiency
Increased fuel consumptionReduced engine efficiency and increased fuel consumption translates into higher operating costs. Therefore, Caterpillar Inc. recommends repairing out-of-spec parts or replacing out-of-spec parts.Inspection and/or Replacement
Piston Rings, Crankshaft Bearings, Valve Rotators, and Crankshaft Seals
The following components may not last until the second overhaul.
Thrust bearings
Main bearings
Rod bearings
Valve rotators
Crankshaft sealsCaterpillar Inc. recommends the installation of new parts at each overhaul period.Inspect these parts while the engine is disassembled for an overhaul.Inspect the crankshaft for any of the following conditions:
Deflection
Damage to the journals
Bearing material that has seized to the journalsCheck the journal taper and the profile of the crankshaft journals. Check these components by interpreting the wear patterns on the following components:
Rod bearing
Main bearingsNote: If the crankshaft is removed for any reason, use the magnetic particle inspection process to check for cracks in the crankshaft.Inspect the camshaft for damage to the journals and to the lobes.Note: If the camshaft is removed for any reason, use the magnetic particle inspection process to check for cracks in the camshaft.Inspect the following components for signs of wear or for signs of scuffing:
Camshaft bearings
Camshaft followersCaterpillar Inc. recommends replacing the crankshaft vibration damper.Oil Cooler Core and Aftercooler Core
During an overhaul, the removal of the oil cooler core and the aftercooler core is recommended. The oil cooler core and the aftercooler core should be cleaned and pressure tested.
Do not use caustic cleaners to clean the core.Caustic cleaners can attack the internal metals of the core and cause leakage.
Note: Use this cleaning procedure to clean the oil cooler core and the aftercooler core.
Remove the oil cooler core and the aftercooler core.
Remove any debris from the oil cooler core and the aftercooler core. To remove debris from the oil cooler core, turn the oil cooler core onto one end. To remove debris from the aftercooler core, turn the aftercooler core upside-down.
Flush the oil cooler core and the aftercooler core internally with cleaner in order to loosen foreign substances. This will also help to remove oil from the oil cooler core and the aftercooler core. Note: The use of Hydrosolv Liquid Cleaners is recommended. Table 1