GUARD AS 1Q3129 - Caterpillar

Table 1
Recommendations for the Major Overhaul    
Service    Component    
Rebuild     Centrifugal oil filters    
Cylinder heads
Starting motor
Vibration damper
Replace     Accessory group bearings    
Camshaft bearings (1)
Connecting rod bearings (2)
Cylinder head valves and valve guides
Cylinder head valve spring guides
Exhaust manifold bellows
Exhaust shields
Front gear train bearings (3)
Fuel injectors
Main bearings (2)
Oil pump bearings
Oil temperature regulators
Turbocharger bearings and bushings
Water pump bearings
Water temperature regulators
Inspect     Aftercooler cores    
Alarm and shutoff controls
Camshafts (1) (4)
Crankshaft (2) (4)
Cylinder block
Cylinder liners
Cylinder sleeves
Exhaust manifolds
Front gear group (3)
Oil cooler
Oil pump bushings
Oil suction screen
Pistons and piston rings
Priority valve
Rear gear group (3)
Rear gear train bearings (3)
Rocker arm bearings
Thermocouples
Thrust bearings
Valve mechanism group
Replace the gaskets and seals of these components.     Air inlet lines    
Camshaft front covers
Camshaft drive gear covers
Central structure covers
Crankcase side covers
Crankshaft (5)
Crankshaft vibration damper
Cylinder heads
Exhaust manifold
Front housing group
Fuel lines
Fuel transfer pump
Gear inspection group
Oil cooler
Oil lines
Oil temperature regulators
O-ring seals and plugs
Power take-off covers
Priority valve group
Rear gear train
Rear housing group
Rear structure covers
Turbocharger
Valve covers
Water lines
Water pumps
Water temperature regulators
( 1 ) Inspect the camshaft for damage to the journals and the lobes. Inspect the camshaft bearings and the camshaft followers for signs of wear and/or scuffing.
( 2 ) Inspect the crankshaft for these conditions: deflection, damage to the journals and bearing material that has seized to the journals. Inspect the profile and the taper of the crankshaft journals. Compare the crankshaft journals to the wear patterns in the connecting rod bearings and the main bearings.
( 3 ) Inspect the gears and the bushings of the gear trains for worn gear teeth, unusual fit, and unusual wear.
( 4 ) If the crankshaft or the camshaft are removed for any reason, use the magnetic particle inspection process to check for cracks.
( 5 ) Inspect the area around the front seal and the rear seal of the crankshaft. It is not necessary to replace a crankshaft seal if the seal is not leaking.