Overview
The ZF 4656.109.402 is a precision-engineered OEM genuine component specifically designed for the WG 160 series transmission. This part functions as a critical internal sealing and alignment element, ensuring proper oil flow and pressure regulation within the gear train. The SKU 4656.109.402 is a direct replacement for worn units, restoring the transmission’s hydraulic integrity. It sits adjacent to the 4656201075: HOUS.FRONT SECT and works in conjunction with the 4656201035: HOUSING REAR PART to maintain structural rigidity under high torque loads.
Symptoms of Failure
When the ZF 4656.109.402 begins to degrade, operators often notice intermittent gear slipping under load—a classic sign of pressure loss. Another common failure symptom is external oil seepage around the WG160 bell housing, which can be mistaken for a simple gasket issue. Technicians may also detect delayed engagement when shifting from neutral to drive, indicating internal leakage past this component. Finally, erratic shift quality or harsh upshifts frequently point to a worn 4656.109.402, as it directly affects clutch pack modulation.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.109.402 |
| Material | High-grade alloy steel with nitrided surface |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4656.109.402 (Genuine) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 24.3 mm |
| Sealing Type | PTFE lip seal with metal casing |
Compatibility
This OEM genuine part is primarily engineered for the ZF WG 160 series transmission family. It is also compatible with the WG 180 and WG 200 models where the same hydraulic circuit design is used. The 4656.109.402 interfaces directly with the 4472239178: HOUSING REAR PART and is secured using a 0636100817: CAP SCREW. For proper installation, a 0631306816: CYLINDRICAL PIN is required to align the assembly. Additional compatible models include the WG 140 and WG 250, though verification of the housing bore diameter is recommended.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201075 | HOUS.FRONT SECT | Front housing section for gear support |
| 4656201035 | HOUSING REAR PART | Rear housing section for torque converter |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100817 | CAP SCREW | Fastener for securing housing sections |
| 4656301016 | SCREEN SHEET | Oil filter screen for debris protection |
| 4656301017 | SCREEN SHEET | Secondary oil filter screen |
| 0636100803 | CAP SCREW | Alternate fastener for valve body |
| 0501316470 | BREATHER | Pressure equalization vent |
| 0750301003 | OIL FEED.HOUSG. | Oil supply housing for lubrication |
Frequently Asked Questions
Q: Can the ZF 4656.109.402 be reused after removal?
A: No. This is a single-use sealing component. Reuse will likely cause immediate oil leaks and pressure loss. Always install a new OEM genuine part.
Q: Does this part require special tools for installation?
A: Yes. A press tool or bearing driver matching the 68.5 mm outer diameter is recommended to avoid damaging the PTFE lip seal. A 0631306816: CYLINDRICAL PIN is also needed for alignment.
Q: What is the typical service life of the 4656.109.402?
A> Under normal operating conditions with proper oil maintenance, this part typically lasts 300,000 to 500,000 km. Harsh duty cycles or contaminated fluid will reduce its lifespan significantly.
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Phone: +86 158 2286 3467 |
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