Overview
The ZF 4656.172.007 is a critical OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a precision-machined adapter or cover element within the transmission housing assembly, ensuring proper sealing and alignment of internal hydraulic circuits. The SKU 4656.172.007 sits directly between the main casing and the front section, playing a vital role in maintaining oil pressure integrity. When installed alongside the TRANSMISSION HOUSING, it creates a sealed environment that prevents contamination and supports smooth gear engagement.
Symptoms of Failure
- Oil seepage at the front bell housing: A worn 4656.172.007 gasket surface often leads to visible transmission fluid leaks around the WG160 casing, especially after thermal cycling.
- Erratic shift timing or gear hunting: When this part loses its structural integrity, internal oil pressure drops, causing delayed engagement or unexpected neutral conditions during operation.
- Metallic debris in the oil pan: Degradation of the 4656.172.007 can introduce fine metal particles into the hydraulic circuit, accelerating wear on adjacent components like the HOUS.FRONT SECT.
- Whining noise during acceleration: A compromised seal allows air ingestion into the pump, producing a high-pitched whine that intensifies under load.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.172.007 |
| Material | Die-cast aluminum alloy (A380) |
| Weight | 1.85 kg (4.08 lbs) |
| Overall Length | 245 mm |
| Bolt Hole Pattern | 6x M10 on 130 mm PCD |
| O-Ring Groove Diameter | 3.5 mm x 180 mm |
| Surface Finish | Anodized (Mil-Spec) |
| OEM Reference | ZF 4656.172.007 (Genuine) |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 models when used in conjunction with the correct HOUSING REAR PART. The 4656.172.007 interfaces directly with the HOUSING REAR PART (variant 4472239177) in later production runs. Always verify your transmission serial number before ordering, as minor revisions exist between WG160, WG180, and WG200 sub-assemblies.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and clutch |
| 4656201034 | HOUSING REAR PART | Rear housing section for output shaft |
| 4472239177 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100817 | CAP SCREW | M10 bolt for housing fastening |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return |
| 4656301017 | SCREEN SHEET | Coarse mesh filter for suction side |
| 0636100803 | CAP SCREW | M8 bolt for cover plate |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply channel |
Frequently Asked Questions
Q: Can the 4656.172.007 be installed without replacing the housing gasket?
A: No. We strongly recommend replacing the mating gasket and O-ring simultaneously. The part’s sealing surface is sensitive to old gasket residue, which can cause immediate leaks.
Q: Is this part interchangeable between WG160 and WG180 transmissions?
A: Yes, with one caveat: you must also replace the HOUS.FRONT SECT if upgrading from WG160 to WG180, as the bolt pattern differs slightly.
Q: What torque specification should be used for the cap screws?
A: Use 45 Nm (33 ft-lbs) for the M10 cap screws (part 0636100817) and 25 Nm (18 ft-lbs) for the M8 screws (part 0636100803). Always use a torque wrench in a cross-tightening pattern.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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