Caterpillar — Turbocharger - Inspect
Maintenance
From a Caterpillar owner's manual covering: 1YG1-Up, 4CG1-Up, G3612, G3616. Check it applies to your exact model before use.
Applies to: Caterpillar G3612, Caterpillar G3616
Before you start
- If turbocharger fails during engine operation, damage to compressor wheel and/or engine may occur.
- Turbocharger bearing failures can cause large quantities of oil to enter air inlet and exhaust systems.
Procedure
- Remove exhaust outlet piping and air inlet piping. Visually inspect piping for oil.
- Turn compressor wheel and turbine wheel by hand. Should turn freely. Inspect for contact with housing. If contact, recondition turbocharger.
- Check compressor wheel for cleanliness. If oil on back side, possible failed oil seal.
- Inspect turbine wheel and nozzle for deposits of ash and silicon. If deposits of 1 mm (1/32 inch) thickness found, disassemble and clean at ABB repair facility.
- Inspect bore of turbine housing for corrosion.
- Clean turbocharger housing with standard shop solvents and soft bristle brush.
- Check clearances of turbocharger bearing. Compare to Service Manual, Specifications. If not within specifications, repair turbocharger.
- Fasten air inlet piping and exhaust outlet piping to turbocharger housing.
Tools required
- soft bristle brush Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Deposits of 1 mm (1/32 inch) thickness require disassembly and cleaning
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.