ZF 5838.140.001 HOISTING UNIT | OEM Genuine Part
Overview
The ZF 5838.140.001 HOISTING UNIT is a critical OEM genuine component engineered for the power take-off (PTO) assembly within heavy-duty construction machinery transmissions. This unit functions as the primary interface for hydraulic pump engagement, converting rotational energy from the transmission to drive auxiliary hoisting systems. Specifically, it sits on the rear face of the transmission housing, coupling directly to the 5838022003: REAR AXLE to manage load distribution during lifting operations. The SKU 5838.140.001 is precision-machined to maintain exact gear mesh tolerances, ensuring consistent torque delivery under extreme operational stress.
Symptoms of Failure
- Hydraulic pressure loss during hoisting: A worn hoisting unit fails to maintain pump drive engagement, causing intermittent lifting power and delayed response times.
- Metallic grinding noise from transmission rear: Damaged internal gears or bearings within the 5838.140.001 produce audible chatter, particularly under load, indicating imminent component seizure.
- Oil contamination with bronze or steel particles: Degraded bushings shed material into the transmission fluid, often accompanied by a burnt odor from friction overheating.
- Intermittent PTO disengagement: The unit may slip out of gear during operation, leading to sudden loss of hoist function and potential safety hazards on job sites.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.140.001 |
| OEM Reference | ZF 5838.140.001 |
| Material | Case-hardened alloy steel with nitrided gear teeth |
| Weight | 4.2 kg (9.26 lbs) |
| Overall Length | 185 mm |
| Mounting Bolt Pattern | 4-hole, 90 mm PCD |
| Input Spline | 14-tooth, 30° pressure angle |
| Max Torque Capacity | 850 Nm |
| Seal Type | Double-lip nitrile with dust exclusion |
Compatibility
This hoisting unit is designed for integration with ZF WG series powershift transmissions commonly deployed in wheel loaders, excavators, and telehandlers. Verified compatible models include the ZF WG180, WG200, and WG210 series, where it interfaces with the 5838109001: DIFFERENTIAL assembly. It also fits select ZF 4WG-200 and 6WG-200 variants used in mining and quarry equipment. For optimal performance, always pair this unit with the 0750117075: TAPER ROLLER BEARING and the 5838300128: DIFFERENTIAL HOUSING to maintain axial alignment and prevent premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Transmits torque from hoisting unit to wheels |
| 5838109001 | DIFFERENTIAL | Distributes power between left/right axles |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on hoisting shaft |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses and protects differential gears |
| 0631329086 | SPRING PIN | Secures hoisting unit alignment dowels |
| 5838300129 | THRUST WASHER | Reduces axial friction in gear stack |
| 5838300130 | THRUST WASHER | Secondary axial clearance control |
| 5838300131 | AXLE BEVEL GEAR | Changes torque direction to axle shafts |
| 5838300132 | COMPENS. STUB AXLE | Compensates for thermal expansion in housing |
| 5838300133 | COMPENS. STUB AXLE | Secondary expansion compensation component |
