Overview
The ZF 4656.183.368 LOOSE PARTS for WG171 is a critical service kit designed to restore the internal sealing and structural integrity of your ZF WG171 transmission. This OEM genuine part set includes the specific seals, gaskets, and small hardware required to address common wear points within the valve body and clutch housing interface. The SKU 4656.183.368 is engineered to match factory tolerances, ensuring that hydraulic pressure remains stable during gear shifts. When installed alongside the 4656101028: TRANSMISSION HOUSING and the 4656301066: HOUS.FRONT SECT, this loose parts kit prevents cross-contamination between fluid circuits.
Symptoms of Failure
- Delayed or harsh engagement — When the 4656.183.368 seals degrade, you may notice a 2-3 second delay when shifting from Neutral to Drive, often accompanied by a jarring clunk.
- Intermittent loss of forward gears — Worn components in this kit can cause the transmission to suddenly lose forward drive while reverse remains functional, a classic sign of internal leakage.
- External oil seepage at the housing seam — A visible drip or wet film around the joint between the 4656301037: TUBE and the main case indicates the loose parts have fatigued.
- Erratic shift timing under load — If the transmission hunts for gears or flares between shifts when towing, the internal seals from this kit are likely bypassing hydraulic fluid.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4656.183.368 |
| Material Composition | Nitrile rubber (NBR) seals, hardened steel retainers |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 4656.183.368 (Genuine) |
| Operating Temperature Range | -40°C to +150°C |
| Compatible Fasteners | 0636100803: CAP SCREW and 0636100801: CAP SCREW |
| Sealing Surface | Requires 0634313514: O-RING for final assembly |
Compatibility
This loose parts kit is primarily designed for the ZF WG 171 Series transmission. It is also compatible with the WG180 and WG200 models that share the same valve body architecture and seal groove dimensions. The kit integrates directly with the 4656201015: SCREEN SHEET to filter debris before fluid reaches the new seals. For full rebuilds, pair this kit with the 4656301042: HOUSING REAR PART and the 0631306816: CYLINDRICAL PIN for precise alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing that encloses the gearset |
| 4656301066 | HOUS.FRONT SECT | Forward section housing the torque converter interface |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting valve body passages |
| 4656301037 | TUBE | Hydraulic fluid transfer conduit between sections |
| 0634313514 | O-RING | Static seal for housing joints |
| 0636100803 | CAP SCREW | M10 fastener for housing retention |
| 4656301042 | HOUSING REAR PART | Rear casing section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 0636100801 | CAP SCREW | M8 fastener for valve body mounting |
| 0636100160 | CAP SCREW | M6 fastener for oil pan attachment |
Frequently Asked Questions
Q: Can the 4656.183.368 kit be used without replacing the screen sheet?
A: It is strongly recommended to replace the 4656201015: SCREEN SHEET simultaneously, as debris from failed seals often clogs the filter, leading to premature failure of the new loose parts.
Q: Does this kit include the O-ring for the front housing?
A: No, the 4656.183.368 kit contains only the loose internal seals and small hardware. You must order the 0634313514: O-RING separately to seal the housing interface.
Q: What is the typical service interval for these loose parts?
A: In severe-duty applications (construction or mining), inspect the 4656.183.368 components every 2,000 operating hours or whenever the 4656301066: HOUS.FRONT SECT is removed for maintenance.
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Phone: +86 158 2286 3467 |
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