Overview
The ZF 0899.313.872 SCREW-IN SLEEVE is a precision-machined OEM genuine component engineered specifically for the WG 251 series transmission. This threaded sleeve functions as a critical sealing and alignment interface, securing internal hydraulic circuits within the transmission housing assembly. Designed to withstand high torque loads and thermal cycling, the 0899.313.872 sleeve prevents fluid bypass between pressure galleries. It installs directly into the TRANSMISSION HOUSING and works in concert with the HOUSING to maintain structural integrity. As an OEM part, SKU 0899.313.872 guarantees exact fitment and material composition for WG251 rebuilds and overhauls.
Symptoms of Failure
- External oil seepage at the sleeve base: A worn or cracked 0899.313.872 allows transmission fluid to weep past the threads, leaving visible drips under the bell housing area.
- Erratic gear engagement under load: When the screw-in sleeve loses its sealing capability, hydraulic pressure drops in the clutch circuits, causing delayed or slipping shifts during acceleration.
- Metallic debris in the oil pan: Fractured sleeve fragments can enter the lubrication system, often detected during routine filter inspections or magnetic plug checks.
- Whining noise from the transmission: A loose or deformed sleeve alters fluid flow dynamics, generating a high-pitched sound that intensifies with RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0899.313.872 |
| OEM Reference | ZF 0899.313.872 |
| Material | Case-hardened steel with zinc-nickel plating |
| Thread Type | Metric fine pitch (M24 x 1.5) |
| Overall Length | 42 mm |
| Hex Drive Size | 10 mm internal hex |
| Weight | 0.085 kg |
| Torque Specification | 55 N·m (dry) |
Compatibility
This screw-in sleeve is designed for the ZF WG 251 series, but its thread pattern and sealing geometry also apply to earlier WG180 and WG200 variants. It is commonly used in WG180, WG200, WG210, and WG251 transmissions found in off-highway trucks, wheel loaders, and agricultural tractors. The 0899.313.872 replaces the COVER retention system in older builds and is secured using a CAP SCREW for final locking. Always verify housing compatibility with your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101072 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4646301201 | HOUSING | Intermediate housing for valve body and pump mounting |
| 4646301166 | COVER | End cover sealing the clutch piston chamber |
| 0636101051 | CAP SCREW | Fastener for securing the screw-in sleeve |
| 4646201018 | COVER SHEET | Gasket layer between housing sections |
| 4646301277 | SCREEN SHEET | Filter mesh for hydraulic fluid intake |
| 4646201019 | COVER SHEET | Secondary sealing shim for pressure regulation |
| 0730365125 | TYPE PLATE | Identification tag with transmission specs |
| 0631311009 | GROOVED STUD | Alignment dowel for housing positioning |
| 0636010216 | HEXAGON SCREW | Standard bolt for cover plate attachment |
