Overview
The ZF 4681.054.021 4 BP 210 BASICPOWER Transmission Assembly represents a complete, ready-to-install unit engineered for demanding industrial driveline applications. This assembly functions as the primary power transfer module within the BP 210 and BP 230 series, converting engine torque into controlled rotational force for heavy machinery. As a fully assembled unit, it eliminates the need for piecemeal component sourcing, ensuring precise alignment of internal planetary gearsets, clutch packs, and hydraulic control elements. The SKU 4681.054.021 is specifically designed to restore original performance levels in ZF transmissions that have experienced significant wear or catastrophic failure, offering a direct replacement that maintains factory tolerances and hydraulic flow characteristics.
Symptoms of Failure
When the ZF 4681.054.021 assembly begins to degrade, operators often notice distinct operational anomalies. Delayed or harsh engagement between forward and reverse gears is a primary indicator, frequently caused by worn clutch discs or degraded piston seals within the unit. Another common symptom is intermittent loss of drive under load, where the transmission slips or fails to transmit power when climbing gradients or carrying heavy payloads, pointing to internal pressure loss or planetary gear wear. Contaminated transmission fluid with metallic particles is a critical sign, typically resulting from bearing spalling or gear tooth chipping inside the assembly. Finally, audible whining or grinding noises from the transmission housing, especially during gear changes, often indicate advanced wear in the input shaft bearings or sun gear components.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4681.054.021 |
| Assembly Type | Complete Transmission Unit (4 BP 210 BASICPOWER) |
| Overall Length | Approx. 620 mm (24.4 in) |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Housing Material | High-strength aluminum alloy with cast iron reinforcement |
| Input Torque Capacity | Up to 2,100 Nm (1,549 lb-ft) |
| OEM Reference | ZF 4681.054.021 (Original Equipment Manufacturer) |
| Fluid Capacity | Approx. 12.5 liters (3.3 gallons) of ZF-approved ATF |
Compatibility
This assembly is engineered for direct integration into specific ZF transmission series. It is primarily compatible with the BP 210 Series and BP 230 Series transmissions, which are commonly found in mid-range wheel loaders, telescopic handlers, and industrial forklifts. Based on its construction and hydraulic architecture, the 4681.054.021 unit also fits select variants of the WG180 and WG200 transmission models, particularly those configured for 4-speed power shift operation. For vehicles originally equipped with a ZF 4 BP 210 or 4 BP 230 transmission, this assembly serves as a direct bolt-on replacement without requiring adapter plates or driveline modifications. Always verify the transmission serial number and vehicle manufacturer specifications to confirm fitment before installation.
