Caterpillar — Turbocharger - Cleaning and Inspecting
Maintenance
From a Caterpillar owner's manual covering: 3508, 3512, 3512B, 3516, 3516B. Check it applies to your exact model before use.
Applies to: Caterpillar 3508, Caterpillar 3512, Caterpillar 3512B, Caterpillar 3516, Caterpillar 3516B
Before you start
- Do not continue engine operation if turbocharger bearing failure causes performance loss.
Procedure
- Remove exhaust outlet piping and air inlet piping. Inspect piping for oil; clean interiors.
- Turn compressor wheel and turbine wheel by hand; assembly should turn freely.
- Inspect wheels for contact with turbocharger housing; recondition if contact found.
- Check compressor wheel for cleanliness; oil on back side suggests failed oil seal.
- Use a dial indicator to check end clearance on the shaft.
- Inspect bore of turbine housing for corrosion.
- Clean turbocharger housing with standard shop solvents and a soft bristle brush.
- Fasten air inlet piping and exhaust outlet piping to turbocharger housing.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- If end play greater than Service Manual specifications, repair or replace
Full service-parts list: Caterpillar 3508 →, Caterpillar 3512 →, Caterpillar 3512B →, Caterpillar 3516 →, Caterpillar 3516B →
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.