Motor Grader Rear Drive Shaft – Length, Phasing and Flange Guide
The rear drive shaft transfers torque between motor grader drivetrain assemblies while accommodating movement and alignment changes. Correct fit requires the proper installed length range, end interfaces, slip spline and universal-joint arrangement.
Drive shaft order checklist
| Feature | Record |
|---|
| Length | State whether measured installed, fully compressed or fully extended; identify datum faces |
| Ends | Flange pilot, bolt circle, yoke type, spline count and retention |
| Slip section | Travel, spline engagement and dust-seal arrangement |
| Universal joints | Cross size, bearing-cap retention and yoke orientation |
| Machine | Model, serial number, transmission and axle configuration |
Why does phasing matter?
Yokes must be assembled in the specified relationship. Incorrect phasing can create cyclic speed variation and vibration. Before separating a reusable slip joint, mark its orientation. Do not assume balance weights or yokes may be repositioned.
Workshop inspection
Check for dented tubing, missing balance weights, loose joints, seized splines and flange fretting. A drive shaft damaged by misalignment may fail again unless bearing mounts, reducer flanges and machine articulation are also inspected.
Related components
Confirm the mating shaft flange geometry and review the reducer assembly interfaces.
FAQ
Is overall free length enough to identify the shaft?
No. Measurement condition, end interfaces, slip travel and joint sizes are also required.
Can a shaft be installed 180 degrees out of phase?
Follow the manufacturer marks and procedure; incorrect yoke relationship can cause vibration.
Do new universal joints solve every vibration?
No. Bent tubing, flange runout, balance, angles and connected bearings must also be checked.
Compatibility note: Match the entire driveline path and machine serial number before supply.
