Caterpillar — Turbocharger - Inspect/Clean
Maintenance
From a Caterpillar owner's manual covering: 3126B, 3126B Petroleum Engine, Z2A1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar 3126B
Before you start
- When a turbocharger bearing failure is accompanied by significant engine performance loss, do not continue engine operation.
Procedure
- Remove the exhaust outlet piping and the air inlet piping; visually inspect the piping for oil.
- Turn the compressor wheel and turbine wheel by hand; the assembly should turn freely.
- Inspect the wheels for contact with the turbocharger housing.
- Check the compressor wheel for cleanliness.
- Use a dial indicator to check the end clearance on the shaft.
- Inspect the bore of the turbine housing for corrosion.
- Clean the turbocharger housing and the backing plate of the cartridge with standard shop solvents and a soft bristle brush.
- Fasten the air inlet piping and exhaust outlet piping to the turbocharger housing.
Tools required
- Dial indicator Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Compare end play to Service Manual specifications
Full service-parts list: Caterpillar 3126B →
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.