LONG BLOCK 20R5286 - Caterpillar

Inspection of Components
Inspect the following components according to the instructions that are in Cat reusability publications. Refer to Guidelines for Reusable Parts and Salvage Operations, SEBF8029, "Index of Publications on Reusability or Salvage of Used Parts".
Aftertreatment - CEM housing and mounting structure
Aftertreatment - DEF nozzle
Aftertreatment - dosing cabinet
Aftercooler core
Camshaft
CEM
Crankshaft
Dosing cabinet
Driven equipment (alignment)
Engine cylinder block
Engine control module
Exhaust bellows shields
Flywheel
Front gear train (gears)
Oil suction screen
Rear gear trainInspect the camshaft for damage to the journals and the lobes.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 or the camshaft are removed for any reason, use the magnetic particle inspection process to check for cracks.Replace the crankshaft vibration damper if any of the following conditions occur:
Engine failure due to a broken crankshaft
Excessive wear of the front bearing for the crankshaft
Excessive wear of the gear train that is not caused by a lack of lubricationInspect the gears of the gear train and inspect the gear train bushings for the following conditions:
Worn gear teeth
Unusual fit
Unusual wearIn addition to the inspection of components, inspect the alignment of the driven equipment. See the Application and Installation Guide for the engine or see the literature that is provided by the OEM of the driven equipment.Inspection, Reconditioning, or Exchanging of Components
Inspect the following components according to the instructions that are in Cat reusability publications. Refer to Guidelines for Reusable Parts and Salvage Operations, SEBF8029, "Index of Publications on Reusability or Salvage of Used Parts".Recondition the worn components or exchange the components, if necessary. Your Cat dealer can provide these services and components.
Camshaft followers
Camshaft thrust washers
Compressor outlet tubes and seals
Connecting rods
Crankshaft vibration damper
Cylinder head assembly
Cylinder liners
Dosing pump
Engine mounts
Scavenge oil pump
Engine wiring harness
Exhaust manifold seals
Exhaust manifold bellows
Fuel pressure regulating valve
Fuel priming pump
Fuel transfer pump
Inlet manifold gaskets
Inlet manifold seals
Oil cooler core
Oil pump
Pistons
Piston pins
Prelube pump
Pushrods
Rocker arms
Spacer plate
Software update
TurbochargerInspect and Lubricate
Inspect and lubricate the following (If Equipped):
Duplex oil control valve linkageReplacement of Components
Replace the following components during the major overhaul:
Aftertreatment - air regulator
Aftertreatment - air strainer
Aftertreatment - CEM sensors and harness
Aftertreatment - dosing cabinet sensors, harness, and solenoid valves
Aftertreatment - DEF nozzle
Aftertreatment - DEF strainer
Aftertreatment - SCR catalysts
Camshaft bearings
Check valve assembly (duplex filter group)
Connecting rod bearings
Crankshaft seals
Crankshaft thrust washers
Electronic unit injectors
Gear train bushings
Gear train bearings
Main bearings
Piston ringsCleaning of Components
Clean the oil cooler core and the aftercooler core. Then, pressure test both of these cores. For instructions on cleaning the cores, see this Operation and Maintenance Manual, "Aftercooler Core - Inspect/Clean" topic.Clean the oil suction screen. Also, remove side covers to clean the oil sump. For instructions on removal and installation of components, see the Service Manual, "Disassembly and Assembly" module.Obtain a Coolant Analysis
For conventional heavy-duty coolant/antifreeze, check the concentration of supplemental coolant additive (SCA) regularly. The concentration of SCA can be checked with an S O S coolant analysis (Level 1). A more detailed coolant analysis