Motor Grader Turbine Shaft – Spline and Journal Identification Guide
This motor grader turbine shaft must be matched to the exact transmission or torque-converter configuration. The current record does not show a verified part number, so selection should use the powertrain identification plate, machine serial number and a complete comparison of the removed shaft.
A shaft with a similar overall shape can differ at its spline, bearing journal, shoulder, thread or oil passage. Measure each functional interface in sequence and document wear separately from the original design dimensions.
Shaft identification from end to end
| Product type | Motor grader turbine shaft |
| Part number | Not shown in the original record; verification required |
| System | Transmission / torque-converter powertrain |
| Critical checks | Length, splines, pilots, journals, shoulders, threads and oil passages |
Measurements and evidence to provide
Full shaft photograph with all original markings visible.
Overall length and shoulder-to-shoulder dimensions.
Spline tooth count, major diameter and engagement length at each end.
Bearing references and measured journal diameters.
Thread diameter, pitch, direction and retaining arrangement.
Position and diameter of oil holes or lubrication grooves.
Transmission or converter plate plus the grader serial plate.
Wear clues during overhaul
Inspect for twisted or polished splines, fretting at bearing seats, scoring, heat discoloration, cracked shoulders and damaged threads. Check runout using supported reference journals and the applicable service limit. Oil starvation, contamination, bearing failure or misalignment can damage the shaft and must be corrected before a new part is installed.
Check the parts that support the shaft
Review bearings, thrust washers, seals, spacers, turbine hub and mating splines. A worn mating component can concentrate load on a new shaft. Debris found in the sump or filter should trigger a wider powertrain inspection and cleaning process rather than a shaft-only repair.
Assembly and commissioning
Protect journals and splines during handling. Use the correct bearing installation method and return spacers and retainers to their documented positions. Verify end clearance, lubrication flow and locking methods from the service information. After installation, monitor powertrain oil pressure, temperature, noise and drive response during controlled testing.
Related powertrain identification pages
For the mating turbine component, review the motor grader turbine assembly guide. For another drivetrain shaft, see the double-chain gear shaft 83513201. These links assist identification and do not establish interchangeability.
FAQ
Can a turbine shaft be matched by spline count alone?
No. Spline diameter, form and length, journals, shoulders, threads and the exact powertrain model must also match.
How should a worn journal be measured?
Measure at multiple positions and directions with calibrated tools, and compare with the service specification. Record taper and out-of-round condition.
What can cause repeated spline wear?
Misalignment, worn mating splines, incorrect clearance, shock loading or lubrication problems may contribute. Inspect the complete interface.
Why check oil passages?
Blocked or mismatched passages can prevent lubrication from reaching bearings and thrust surfaces.
Compatibility note: Final selection requires verified powertrain identity, original shaft markings and complete measured interface data.
