Overview
The ZF 4656.185.008 ACCESSORIES for WG160 is a critical OEM genuine component designed to support the internal hydraulic and mechanical systems within the WG 160 transmission series. This accessory kit includes precision-engineered brackets, seals, and alignment fixtures that ensure the main housing assembly maintains structural integrity under high-torque loads. Positioned between the HOUS.FRONT SECT and the HOUSING REAR PART, this accessory set directly influences gear alignment and oil flow regulation. The SKU 4656.185.008 is factory-tested to ZF’s original tolerances, making it a direct replacement for worn-out hardware in heavy-duty commercial vehicles.
Symptoms of Failure
- Persistent oil seepage around the transmission bell housing – When the 4656.185.008 accessories degrade, seals lose their clamping force, leading to visible fluid trails on the exterior of the TRANSMISSION HOUSING.
- Intermittent gear engagement hesitation – Worn accessory brackets can cause micro-movement in the HOUSING REAR SECTION, delaying shift response under load.
- Abnormal vibration during torque converter lockup – Loose mounting points from fatigued accessories create harmonic resonance, often mistaken for driveline imbalance.
- Increased operating temperature – Failed alignment components restrict oil gallery flow, causing localized overheating in the WG160’s clutch pack area.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.185.008 |
| Material Composition | Hardened steel with zinc-nickel coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Dimensions | 120 mm x 45 mm x 30 mm |
| Thread Pitch | M8 x 1.25 (mounting points) |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.185.008 |
Compatibility
This accessory set is engineered specifically for the ZF WG 160 series, but its mounting geometry also fits the WG180, WG200, and WG210 transmissions when used with the correct CYLINDRICAL PIN and FIXING PLATE. It is not backward-compatible with pre-2005 ZF 4HP series. Always verify your transmission’s serial number against the WG160 housing casting before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural shell containing gear sets and valve body |
| 4656201075 | HOUS.FRONT SECT | Forward section housing the torque converter interface |
| 4656201076 | HOUSING REAR PART | Rear casing supporting output shaft bearings |
| 4656298047 | HOUSING REAR SECTION | Extension housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Locking bracket for accessory retention |
| 0636100817 | CAP SCREW | M8 fastener for housing-to-accessory connection |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M6 fastener for screen sheet retention |
Frequently Asked Questions
Q: Can the 4656.185.008 be reused after a transmission rebuild?
A: ZF recommends replacing this accessory kit during any major overhaul because the zinc-nickel coating wears over time, compromising corrosion resistance and clamping force.
Q: Does this part require special tools for installation?
A: Yes, you will need a torque wrench calibrated to 25 Nm for the CAP SCREW fasteners and a pin punch for the CYLINDRICAL PIN alignment.
Q: How do I confirm this accessory fits my WG160 variant?
A: Check the casting number on your TRANSMISSION HOUSING; if it ends with “WG160-XX,” this SKU is compatible. For WG180 or WG200 units, you may also need the FIXING PLATE adapter.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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