Cummins/Onan — Checking Total End Clearance
Maintenance · Rotor assembly
From a Cummins/Onan service manual covering: ST-50, T-18A, VT-50. Check it applies to your exact model before use.
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Procedure
- Remove exhaust outlet connection and intake piping to expose both ends of rotor assembly.
- Attach a dial indicator to compressor housing.
- Push shaft all the way to the rear, place indicator point against end of rotor shaft and zero the indicator.
- Push shaft from the rear toward the indicator point and check the reading against limits in Specifications.
- If end clearance is not within limits, remove turbocharger and replace with new or rebuilt unit.
Tools required
- dial indicator Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- See Specifications pages for end clearance limits
Source: Cummins/Onan service 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.