Major Components
Assembly Turbine Wheel
Place assembly, turbine wheel (6) on a vee block.
Position a dial gauge on the turned surface of the shaft
at the threaded end. Check dial gauge reading. Where
shaft bend is greater than the recommended maximum
of 0.015 mm (0.0006 in) replace the assembly.
HX25/25W/27W Service Repair Manual Turbocharger Service and Overhaul
Inspection and Testing
5:8
Inspect split ring seal, turbine (13)
*
groove walls for
wear. If there is any evidence of wear or damage
replace assembly.
If the wear step on the ring face exceeds 0.102 mm
(0.004 in) replace split ring seal, turbine.
If the free gap of the ring is less than 2.0 mm (0.08 in)
replace split ring seal, turbine.
Inspect the bearing journals for excessive scratches
and wear. Where scratching is excessive or where
either journal diameter is less than the recommended
minimum of 7.53 mm (0.296 in) replace the assembly.
Inspect for cracked, bent or damaged blades.
Replace with new if any damage found.
Caution
Do not attempt to straighten the turbine shaft.
Caution
Never attempt to straighten blades.
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