Overview
This genuine ZF 4656.306.188 DUCT PLATE is a critical internal component engineered specifically for the WG 210 series transmission. Positioned within the hydraulic control circuit, this precision-machined plate directs the flow of transmission fluid to the correct channels, ensuring proper clutch engagement and lubrication. As an OEM genuine part, the SKU 4656.306.188 guarantees exact fitment and material integrity, preventing cross-leakage between pressure galleries. Without this duct plate, the transmission cannot maintain the hydraulic sequencing required for smooth gear shifts under heavy industrial loads.
Symptoms of Failure
When the ZF 4656.306.188 duct plate wears or becomes warped, operators often notice erratic shift timing during acceleration, as fluid pressure bleeds between circuits. A second common symptom is delayed engagement when shifting from Neutral to Drive, caused by insufficient pressure reaching the clutch packs. You may also observe intermittent gear slippage under load, particularly in lower gears, which indicates the plate is no longer sealing properly. Finally, contaminated transmission fluid with metallic debris can appear if the plate surface degrades, leading to valve body damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.306.188 |
| Material | High-strength aluminum alloy with hardened coating |
| Overall Length | 185 mm |
| Overall Width | 95 mm |
| Thickness | 8.5 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF 4656.306.188 |
| Surface Finish | Ground flatness ≤ 0.02 mm |
Compatibility
This duct plate is primarily designed for the ZF WG 210 series, but it also fits select variants of the WG180, WG200, and WG250 transmissions that share the same hydraulic control architecture. Always verify the part number 4656.306.188 against your transmission’s serial number before installation. The plate interfaces directly with the TRANSMISSION HOUSING and is secured between the HOUS.FRONT SECT and the HOUSING REAR PART. In some configurations, it also mates with the HOUSING REAR SECTION.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4657201161 | HOUS.FRONT SECT | Forward section of the transmission housing |
| 4657201162 | HOUSING REAR PART | Rear housing segment supporting output shaft |
| 4657298107 | HOUSING REAR SECTION | Alternate rear housing variant for WG210 |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing assembly |
| 0636100801 | CAP SCREW | M10 fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains duct plate in position within valve body |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic fluid intake |
| 4657301033 | SCREEN SHEET | Secondary filter screen for return line |
| 0636100803 | CAP SCREW | M8 fastener for duct plate mounting |
Frequently Asked Questions
Q: Can the 4656.306.188 duct plate be reused after a transmission rebuild?
A: ZF recommends replacing this plate with a new OEM unit during any major overhaul. The sealing surfaces can develop micro-wear that compromises hydraulic integrity, even if no visible damage is present.
Q: Does this part require special tools for installation?
A: Yes, you will need a torque wrench calibrated to Nm specifications and a non-marring drift to seat the plate evenly. Always consult the WG210 service manual for bolt tightening sequences.
Q: How does this duct plate differ from the one used in the WG180 series?
A: While the external dimensions are similar, the 4656.306.188 has additional fluid routing channels specific to the WG210’s higher pressure ratings. Using a WG180 plate in a WG210 will cause insufficient lubrication to the rear clutch pack.
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Phone: +86 158 2286 3467 |
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