Overview
This ZF 4657.033.011 3 WG 191 Powershift Transmission Assembly is a complete, fully assembled unit designed for heavy-duty industrial applications. As the core power transfer module in the WG 191 series, this assembly integrates the main gear set, clutch packs, and hydraulic control components into a single ready-to-install package. The SKU 4657.033.011 serves as the direct replacement for worn or failed transmissions in wheel loaders, forklifts, and construction equipment. It mounts between the engine bell housing and the final drive, converting engine torque into precisely controlled wheel speed and direction through its powershift capabilities.
Symptoms of Failure
- Delayed or harsh shifting — When the internal clutch packs or hydraulic seals degrade, operators experience a noticeable lag between gear engagement commands and actual response, often accompanied by jarring shifts.
- Transmission fluid leaks around the housing — Cracks or warpage in the TRANSMISSION HOUSING or HOUS.FRONT SECT allow ATF to escape, leading to low fluid levels and eventual transmission failure.
- Loss of power under load — Worn planetary gears or slipping clutches prevent torque transfer, causing the machine to struggle or stall when pushing heavy materials.
- Unusual whining or grinding noises — Damaged bearings or gear teeth inside the HOUSING REAR PART produce audible metal-on-metal sounds during operation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.033.011 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 191 |
| Overall Length | ~620 mm (estimated) |
| Overall Width | ~480 mm (estimated) |
| Overall Height | ~550 mm (estimated) |
| Dry Weight | ~195 kg (estimated) |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4657.033.011 |
| Mounting Hardware | Includes CAP SCREW (0636102489) and CAP SCREW (0636102463) |
| Sealing Components | FIXING PLATE (4656301148) and SCREEN SHEET (4657201133) |
| Alignment Pin | CYLINDRICAL PIN (0631306816) |
Compatibility
This ZF 4657.033.011 assembly is engineered for the WG 191 series, but its design principles extend to other ZF powershift models. It is directly compatible with WG 180, WG 190, WG 191, and WG 200 transmissions used in articulated dump trucks, telescopic handlers, and industrial loaders. The unit also fits select ZF 3-speed powershift variants where the PLATE (4657301065) and CAP SCREW (0636115287) are used for final assembly. Always verify your transmission serial number against the housing casting to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and hydraulic passages |
| 4657301130 | HOUS.FRONT SECT | Front section housing that supports input shaft and pump drive |
| 4657301131 | HOUSING REAR PART | Rear section housing that contains output shaft and parking brake cavity |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for doweling housing sections together |
| 0636102489 | CAP SCREW | M12 hex cap screw for securing housing flanges |
| 4656301148 | FIXING PLATE | Retaining plate for clutch pack preload adjustment |
| 0636102463 | CAP SCREW | M10 cap screw for valve body attachment |
| 4657201133 | SCREEN SHEET | Fine mesh filter screen for hydraulic oil return circuit |
| 0636115287 | CAP SCREW | M8 cap screw for cover plate fastening |
| 4657301065 | PLATE | Thrust plate for planetary gear carrier retention |
Frequently Asked Questions
Q: Can I install this complete unit without replacing the housing sections?
A: Yes, the 4657.033.011 is a complete assembly that includes all internal components. However, if your existing TRANSMISSION HOUSING shows cracks or wear, we recommend replacing it simultaneously to prevent future leaks.
Q: What is the typical service life of this powershift assembly?
A: Under normal operating conditions with proper fluid maintenance, the ZF 4657.033.011 can last 8,000–12,000 hours. Harsh environments or neglected filter changes may reduce this significantly.
Q: Do I need any special tools to install the CYLINDRICAL PIN during assembly?
A: No special tools are required. The pin is a press-fit alignment dowel; a standard brass drift and hammer are sufficient for installation into the HOUS.FRONT SECT and HOUSING REAR PART.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
