Motor Grader Wheel Hub Assembly – Fitment and Measurement Guide
This motor grader wheel hub assembly page is intended for accurate replacement identification when the original listing does not show a reliable part number or machine model. A hub must match the axle position, bearing seats, wheel-fastener pattern and seal interfaces. Do not select it from general appearance alone.
Before quotation: provide the grader make, complete model, machine serial number and photographs of the removed hub. If a casting or stamped reference is present, photograph it clearly rather than relying on a handwritten label.
Why hub position matters
Front, rear, driven and non-driven wheel positions can use different hub geometry. A visually similar hub may have a different bearing span, flange offset, pilot diameter or fastening arrangement. Confirm the exact axle and left/right position where the machine parts catalogue distinguishes them.
| Product type | Motor grader wheel hub assembly |
| Part number | Not shown in the existing record; verify from original part or catalogue |
| Application | Motor grader wheel-end system |
| Critical checks | Bearing seats, pilot, flange offset, bolt pattern, seal journal and axle interface |
Customer measurements that reduce matching errors
Overall hub height and wheel-flange outside diameter.
Wheel stud or bolt count, thread size and pitch-circle diameter.
Central pilot diameter and flange offset.
Inner and outer bearing references or measured seat diameters.
Seal reference, seal journal diameter and usable width.
Axle-side spline, keyway or mounting interface where applicable.
Photographs of both faces, the internal bore and all markings.
Inspection before replacement
Wheel play, oil leakage, unusual heat or noise can lead to hub inspection, but these symptoms do not prove that the hub itself is the only failed part. Check bearings, races, seals, axle spindle, fasteners and lubricant condition. Scoring on a bearing seat, fretting around studs, cracks near the flange or a damaged seal journal should be evaluated by a qualified technician.
Installation planning
Support the grader safely and follow the machine service procedure. Keep bearing and seal surfaces clean, use the specified lubricant, and install bearings with the correct tools rather than striking the races. Bearing adjustment, fastener torque and any locking method must follow the applicable axle instructions. After assembly, check wheel rotation, end play and leakage before returning the machine to service.
Related motor grader components
For another wheel-end component, review the wheel reducer assembly 800345910 / 83513200. For a separate mechanical drive item, see the XCMG double-row sprocket 800107297 / 85513022. These links support navigation and do not establish interchangeability.
FAQ
Can this wheel hub be ordered without a part number?
It may be identified from the machine serial number and complete measurements, but a verified catalogue or casting reference is preferred.
Is the bolt count enough to confirm fitment?
No. Pilot diameter, pitch circle, flange offset, bearing seats and seal interfaces must also match.
Should bearings and seals be checked at the same time?
Yes. Inspect the complete wheel end and confirm the exact bearing and seal references before assembly.
Does a leaking wheel end always require a new hub?
No. Leakage can involve the seal, journal condition, bearing adjustment, axle housing or lubricant level. Diagnose the cause first.
Compatibility note: Final fitment requires the grader model and serial number, axle position, original markings and measured wheel-hub interfaces.
