Overview
The ZF 5838.300.393 SUPPORT PLATE is a precision-engineered OEM genuine component designed to provide critical structural reinforcement within the final drive assembly of heavy-duty construction machinery. This part functions as a load-bearing interface, securing the differential housing and axle components against torsional stress and axial movement during high-torque operations. As a key element in the power distribution chain, the support plate ensures that the 5838022003: REAR AXLE maintains proper alignment with the transmission output. The SKU 5838.300.393 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit without modification. When installed alongside the 5838109001: DIFFERENTIAL, this plate prevents housing flex that can lead to premature gear wear.
Symptoms of Failure
- Oil seepage at the axle housing interface: A worn support plate often distorts the sealing surface, causing transmission fluid to leak past the gasket. This is a common symptom when the plate has fatigued from repeated load cycles.
- Abnormal gear whine or grinding during turns: If the plate loses its flatness, the 0750117075: TAPER ROLLER BEARING can shift out of preload, creating uneven contact patterns on the bevel gears.
- Vibration in the driveline under acceleration: A cracked or warped support plate allows the 5838300128: DIFFERENTIAL HOUSING to oscillate, transmitting harsh vibrations through the chassis.
- Difficulty engaging or holding gear ratios: When the plate fails to maintain axial rigidity, the differential carrier can walk, causing intermittent gear clash.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (OEM) | 5838.300.393 |
| Material | High-tensile nodular cast iron (GGG-60) |
| Overall Length | 245 mm |
| Overall Width | 185 mm |
| Thickness | 12.5 mm |
| Bolt Hole Pattern | 6 x M12 on 160 mm PCD |
| Weight | 3.8 kg |
| Surface Finish | Ground and phosphated |
| OEM Reference | ZF 5838.300.393 |
Compatibility
This support plate is engineered for integration into ZF’s heavy-duty transmission families commonly deployed in wheel loaders, graders, and excavators. Based on its structural design and bolt pattern, the 5838.300.393 is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG240 series. It also fits select 4WG-200 and 4WG-210 powershift transmissions. For applications using the HP-500 or HP-600 drop boxes, verify housing casting numbers before installation. The plate directly interfaces with the 5838300128: DIFFERENTIAL HOUSING and supports the 5838022003: REAR AXLE assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Transmits torque from differential to wheel hubs |
| 5838109001 | DIFFERENTIAL | Splits torque between left and right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on differential carrier |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures shift fork or actuator linkage |
| 5838300129 | THRUST WASHER | Controls axial clearance in differential assembly |
| 5838300130 | THRUST WASHER | Provides wear surface for bevel gear thrust face |
| 5838300131 | AXLE BEVEL GEAR | Transfers power from pinion to differential |
| 5838300132 | COMPENS. STUB AXLE | Connects differential side gear to axle shaft |
| 5838300133 | COMPENS. STUB AXLE | Opposite-side stub axle for balanced load distribution |
