Motor Grader Turbine Gear – Tooth and Hub Identification Guide
This motor grader turbine gear should be identified from the exact transmission or converter assembly. The existing record does not show a verified part number, so ordering requires tooth data, hub geometry, bore or spline details and the complete powertrain model.
Gears with similar outside diameters may use different tooth counts, tooth forms, pressure angles, offsets or internal interfaces. Compare the removed component with its mating gear and document the position of washers, bearings and retaining parts.
Gear data to confirm
| Product type | Motor grader turbine gear |
| Part number | Not shown in the original record; verification required |
| System | Transmission / torque-converter powertrain |
| Critical checks | Tooth count, tooth form, outside diameter, bore or spline, hub offset and mating gear |
Measurements and photographs for matching
Complete transmission or converter identification plate.
All casting, stamped or etched markings on the gear.
Tooth count and outside diameter measured across undamaged teeth.
Face width, hub height and offset from the gear centreline.
Bore diameter or internal spline count, diameter and engagement length.
Keyway, retaining groove, thrust face and oil-hole dimensions.
Close photographs of the tooth contact pattern and mating component.
Read the wear pattern
Pitting, scoring, chipped teeth or heavy wear on one side of the face can indicate misalignment, bearing movement, lubrication failure or contamination. Polished areas should be evaluated together with backlash and mating-tooth condition. Replacing one gear without correcting bearing or alignment faults can cause repeat damage.
Powertrain inspection before assembly
Inspect the turbine shaft, bearings, thrust washers, spacers, housing bores and mating gears. Remove metallic debris from oil passages, sump and filters according to the overhaul procedure. Confirm the correct lubricant and make sure the new gear seats fully without being forced onto a mismatched spline or pilot.
Installation checks
Return spacers and retainers to their recorded order. Check end clearance, backlash or preload using the service method for the specific unit. Rotate the assembly by hand where permitted and verify smooth engagement before closing the housing. After commissioning, monitor oil pressure, temperature, noise and drive response.
Related turbine-system pages
For the supporting shaft, review the motor grader turbine shaft guide. For the complete rotating component, see the motor grader turbine assembly guide. These links help identify related parts but do not prove direct interchangeability.
FAQ
Can a turbine gear be matched by tooth count only?
No. Tooth form, pitch, face width, hub offset, bore or spline and the mating powertrain must also match.
Should the mating gear be replaced at the same time?
Inspect both contact surfaces and follow the service limits. A severely worn mating gear can damage a new component.
What does edge-loaded tooth wear suggest?
It may indicate misalignment, bearing movement, incorrect spacing or housing issues. Diagnose the assembly before replacement.
Why record spacer order?
Spacer and thrust-part positions can control alignment, clearance and bearing load.
Compatibility note: Final selection requires the exact powertrain identity, original markings, complete tooth data and hub-interface measurements.
