SWITCH AS-HORN 3997802 - Caterpillar

Table 1
Recommendations for Top End Overhauls (1)    
Service     Top End Overhaul (First Interval)     Top End Overhaul (Second Interval)    
Clean     Oil suction screen    
Clean
Inspect
Pressure test     Aftercooler core (2)    
Inspect     Fuel system linkage    
- Connecting rod bearings (3)    
- Cylinder liners (3)    
- Piston crowns and skirts (3)    
- Piston pins (3)    
Inspect
Rebuild     Rocker arms    
Inspect
Rebuild
Replace     Cylinder head assemblies    
Fuel priming pump
- Engine oil pump    
- Fuel transfer pump    
- Prelube pump    
- Scavenge oil pump    
Inspect
Replace     -     Camshaft lifters    
Engine wiring harness
Fuel pressure regulating valve
Pushrods
Spacer plates
Rebuild
Replace     -     Turbochargers    
Replace     Fuel injectors    
Gaskets and seals for the air inlet manifold
Seals and bellows for the exhaust manifold
( 1 ) For instructions on removal and installation of components, see the Service Manual, "Disassembly and Assembly" module.
( 2 ) For instructions on cleaning the core, see this Operation and Maintenance Manual, "Aftercooler Core - Clean/Test" topic.
( 3 ) For 3508 and 3512 Engines, inspect ONLY ONE of the components from each cylinder bank. For 3516 Engines, inspect ONLY TWO of the components from each cylinder bank. This inspection will provide adequate examples of the condition of the other corresponding components. If the results are questionable, inspect more of the components.