Overview
The ZF 0730.301.911 WASHER is an OEM genuine shim component engineered to maintain precise axial clearance within heavy-duty construction machinery transmissions. This hardened steel washer sits between the differential housing and the axle bevel gear assembly, ensuring correct preload on the 0750117075 TAPER ROLLER BEARING. By providing a controlled wear surface, the SKU 0730.301.911 prevents metal-on-metal contact that would otherwise degrade the 5838109012 DIFFERENTIAL assembly. This part is critical for maintaining gear mesh accuracy under the extreme torque loads typical of ZF drivetrains.
Symptoms of Failure
- Transmission oil seepage at the axle flange: A worn 0730.301.911 washer allows the differential housing to shift, breaking the seal and causing slow oil leaks around the 5838300626 DIFFERENTIAL HOUSING.
- Intermittent gear slipping under load: As the washer thickness decreases, axial play increases, causing the 2093209023 DIFFERENTIAL to lose proper tooth engagement with the bevel gear.
- Metallic grinding noise during turns: Excessive clearance from a collapsed washer permits the taper roller bearing to skid, producing a distinct grinding sound when the machine maneuvers.
- Premature bearing wear: Without the correct washer thickness, the taper roller bearing experiences uneven load distribution, accelerating fatigue and spalling.
Technical Specifications
| Part Number | 0730.301.911 |
| Material | Case-hardened alloy steel (SAE 8620 equivalent) |
| Outer Diameter | 72.0 mm |
| Inner Diameter | 52.5 mm |
| Thickness | 2.50 mm (selective fit tolerance ±0.05 mm) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.301.911 |
| Hardness | 58-62 HRC |
Compatibility
This genuine ZF washer is designed for the WG180, WG200, and WG210 series power-shift transmissions commonly used in wheel loaders, graders, and telehandlers. It also fits select ZF 4WG-200 and 6WG-200 models where the differential assembly uses a 52.5 mm inner diameter shim. Always verify the existing washer thickness before replacement, as selective fit washers are matched to the 5838300811 THRUST WASHER stack during original assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential rotation under load |
| 2093209023 | DIFFERENTIAL | Alternate differential variant for WG210 |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures washer alignment in housing |
| 5838300811 | THRUST WASHER | Provides axial bearing surface |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 5838300633 | AXLE | Drives wheel hub assembly |
| 5838300753 | THRUST WASHER | Compensates for differential side gear clearance |
| 5838300818 | THRUST WASHER | Thicker variant for selective fit adjustment |
Frequently Asked Questions
Q: Can I reuse the 0730.301.911 washer during a differential rebuild?
A: No. ZF specifies that this washer must be replaced whenever the differential housing or taper roller bearing is removed. The washer work-hardens in service and loses its precise thickness tolerance.
Q: How do I measure the correct washer thickness for my ZF transmission?
A: Use a depth micrometer to measure the recess in the differential housing, then subtract the bearing protrusion. The target axial play is 0.08-0.15 mm. Select the washer that brings clearance into this range.
Q: Will a thicker thrust washer from the 5838300811 series work as a substitute?
A: No. The 0730.301.911 is a hardened shim washer, not a soft thrust washer. Substituting a thrust washer will cause rapid deformation and differential failure within 50 operating hours.
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Phone: +86 158 2286 3467 |
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