Overview
The ZF 4143.315.074 Planet Carrier is a critical rotating assembly within the HL 100 and HL 270 series powershift transmissions. This OEM genuine part houses the planetary gears and pins, distributing torque from the input shaft to the sun gear and ring gear sets. As the central load-bearing hub of the planetary gearset, it ensures smooth power flow during directional shifts and load changes. The SKU 4143.315.074 is precision-machined to OEM tolerances, directly replacing worn units in heavy-duty industrial drivelines. This component interfaces directly with the 4143101022: HOUSING and the 4143301044: HOUSING, forming the structural core of the transmission’s planetary section.
Symptoms of Failure
- Erratic gear engagement or slipping under load: A worn planet carrier bore or cracked carrier web allows planetary gears to misalign, causing intermittent power loss during acceleration or uphill operation.
- Metallic grinding or whining noise from the transmission housing: Failed needle bearings or carrier pin wear produce a distinct high-pitched whine that increases with engine RPM, often mistaken for pump noise.
- Contaminated transmission oil with metallic debris: Spalling from the carrier’s hardened surfaces sheds ferrous particles into the sump, visible during oil changes as silver or bronze glitter in the filter.
- Excessive axial play in the output shaft: Carrier thrust face wear allows the entire gearset to shift forward, measurable as more than 0.5mm of end float during inspection.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.315.074 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Diameter | 185 mm (7.28 in) |
| Overall Length | 112 mm (4.41 in) |
| Weight | 4.8 kg (10.6 lbs) |
| OEM Reference | ZF 4143.315.074 |
| Hardness | 58-62 HRC (case depth 0.8-1.2 mm) |
| Bore Tolerance | H7 (ISO 286) |
Compatibility
This planet carrier is engineered for the ZF HL 100 and HL 270 series transmissions, commonly found in wheel loaders, forklifts, and industrial tractors. Based on its carrier geometry and spline count, it also fits select WG180 and WG200 models that share the same planetary gearset architecture. Always verify by cross-referencing the carrier’s pinion bore pattern with your existing assembly. The carrier is secured using a 0631329135: SPRING PIN and sealed with a 0636302014: SCREW PLUG to prevent oil bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101022 | HOUSING | Encloses the planet carrier and supports input shaft bearings |
| 4143301044 | HOUSING | Rear housing that aligns the carrier with the output flange |
| 0631329135 | SPRING PIN | Locks the carrier pin to prevent rotation |
| 0636302014 | SCREW PLUG | Seals the carrier lubrication port |
| 0634801057 | SEALING RING | Prevents oil leakage between carrier and shaft |
| 4143301053 | CONNECTING PART | Links carrier to the sun gear shaft |
| 0636100600 | CAP SCREW | Secures the carrier to the housing flange |
| 0636101024 | CAP SCREW | High-tensile fastener for carrier retention |
| 0730365159 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for carrier positioning |
