HX20
Cummins Holset Turbochargers HX20 — Light-duty commercial diesel engines, up to 4L displacement.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Journal bearing bore inspection for wear marks and score damage; bore diameter must meet specifications or housing requires replacement
Turbine and compressor wheel blade inspection for cracks, bends, deformation, or damage; replace if any defects found
Rotor assembly run-out and axial/radial clearances verification using dial gauges and vee blocks; clearances must meet published specifications
Oil system quality and pressure verification: minimum 210 kPa at load, maximum 500 kPa operating (600 kPa at cold start); check for carbon buildup restricting rotation
Air intake and compressor housing cleanliness; inspect for debris, contamination, or air leak points; check compressor wheel for foreign object damage (FOD)
Exhaust side and turbine housing inspection for cracks, heat damage, or thermal fatigue; verify seal integrity and gasket condition
Oil supply and drain line verification for blockages, contamination, or improper connection; confirm adequate oil cooling in bearing housing
Variable geometry vane (VGT) or wastegate actuator functionality testing; check for smooth operation and proper actuation response if applicable
Type-general inspection and maintenance points for this equipment category — not model-specific.
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