Overview
This OEM genuine ZF part, the 4656.006.133, is a critical internal component specifically engineered for the WG 115 Series transmission. It functions as a precision-machined guide or spacer element within the clutch pack or planetary gearset assembly, ensuring correct axial alignment and load distribution during gear shifts. The SKU 4656.006.133 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the hydraulic integrity and mechanical timing of the transmission. This part sits in the mid-section of the gear train, directly interfacing with the HOUS.FRONT SECT and the HOUSING REAR PART to create a sealed, pressurized chamber.
Symptoms of Failure
- Delayed or harsh engagement – When the 4656.006.133 wears, it can cause a noticeable lag when shifting from Neutral to Drive or Reverse, often accompanied by a jarring clunk.
- Intermittent gear slipping under load – A worn part disrupts the clamping force on the clutch discs, leading to a temporary loss of power transfer, especially during uphill climbs or heavy hauling.
- Low hydraulic pressure warnings – Internal leakage past this component can trigger diagnostic trouble codes for insufficient line pressure, as the fluid fails to properly actuate the piston.
- Metallic debris in the oil pan – Advanced wear of the 4656.006.133 generates fine metal particles that contaminate the transmission fluid, accelerating damage to the TRANSMISSION HOUSING and valve body.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4656.006.133 |
| Material | Hardened Alloy Steel (Nitrided) |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 145 mm |
| Inner Diameter | 95 mm |
| Height / Thickness | 22.5 mm |
| OEM Reference | ZF 4656.006.133 |
| Surface Finish | Ground & Polished (Ra ≤ 0.4 µm) |
Compatibility
This genuine ZF part is primarily designed for the WG 115 Series transmission. It is also compatible with the WG 118 and select variants of the WG 120 series that share the same planetary carrier architecture. For heavy-duty applications, it can be used in the WG 180 and WG 200 models when paired with the correct HOUSING REAR SECTION adapter kit. Always verify your transmission’s serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train. |
| 4656201075 | HOUS.FRONT SECT | Front section housing that supports the input shaft. |
| 4656201077 | HOUSING REAR PART | Rear housing segment that aligns the output shaft. |
| 4656298049 | HOUSING REAR SECTION | Extended rear cover for PTO or auxiliary drives. |
| 0631306816 | CYLINDRICAL PIN | Precision dowel pin for locating housing halves. |
| 4656301148 | FIXING PLATE | Locking plate that secures bearing preload. |
| 0636100817 | CAP SCREW | High-tensile bolt for housing fastening. |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit. |
| 4656301017 | SCREEN SHEET | Secondary filter screen for high-pressure gallery. |
| 0636100803 | CAP SCREW | M8 flange bolt for valve body mounting. |
Frequently Asked Questions
Q: Can I install the 4656.006.133 without replacing the surrounding seals?
A: It is strongly recommended to replace all adjacent O-rings and gaskets when installing this part. The 4656.006.133 works in a high-pressure zone, and old seals can cause immediate fluid bypass, negating the benefit of the new component.
Q: How do I know if the 4656.006.133 is the correct part for my WG115 rebuild?
A: Check the stamped serial number on the transmission’s main data plate. The WG115 series uses this part in all revisions after 2012. If your unit has a modified HOUS.FRONT SECT, you may need the 4656.006.133 variant with a thicker thrust washer.
Q: What torque specification is used for the cap screws securing this assembly?
A: The adjacent CAP SCREW (0636100817) should be torqued to 45 Nm (33 ft-lbs) in a cross-tightening pattern. Always consult the ZF service manual for your specific transmission model.
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Phone: +86 158 2286 3467 |
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