Overview
The ZF 4112.309.111 SCREW-IN SLEEVE is an OEM genuine component engineered specifically for the WG 65 series transmission. This precision-machined sleeve serves as a critical sealing and alignment interface within the hydraulic control circuit, ensuring proper oil flow and pressure regulation. As part of the WG65 assembly, it works in conjunction with the 4616105413 OUTPUT and the 4616101117 TRANSMISSION HOUSING to maintain structural integrity. The SKU 4112.309.111 is a direct factory replacement, guaranteeing exact fitment and material specifications for long service life.
Symptoms of Failure
When the ZF 4112.309.111 SCREW-IN SLEEVE begins to wear, operators may notice these specific failure indicators:
- Hydraulic fluid seepage around the sleeve bore – A common sign of degraded sealing, often leading to low oil levels and erratic shifting.
- Intermittent gear slipping under load – Caused by pressure loss at the sleeve interface, resulting in delayed clutch engagement.
- Metallic debris in the transmission pan – Indicates galling or fretting of the sleeve surface, which can contaminate the 0732611049 FILTER INSERT.
- Abnormal noise from the valve body area – A high-pitched whine or chatter suggests the sleeve has loosened, affecting oil flow to the 4616203017 OUTPUT FLANGE.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4112.309.111 |
| Type | Screw-In Sleeve |
| Material | Case-hardened steel (DIN 1.7131) |
| Thread Size | M24 x 1.5 |
| Overall Length | 42.5 mm |
| Outer Diameter | 32.0 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 4112.309.111 |
| Torque Specification | 45 Nm (dry) |
| Sealing Element | Integrated O-ring (see 0634313118 O-RING) |
Compatibility
This SCREW-IN SLEEVE is primarily designed for the ZF WG 65 series, but it also fits select models in the WG180 and WG200 families due to shared hydraulic architecture. It is a direct replacement for transmissions used in heavy-duty off-highway vehicles, including loaders and graders. Always verify fitment with your transmission serial number. The sleeve integrates with the 0636011038 HEXAGON SCREW and the 0631306085 CYLINDRICAL PIN for secure mounting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveline components |
| 4616101117 | TRANSMISSION HOUSING | Encloses and supports internal gear sets |
| 0636011038 | HEXAGON SCREW | Secures housing and sleeve assemblies |
| 0636016015 | HEXAGON SCREW | Fastener for output flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for precision assembly |
| 0634313118 | O-RING | Seals sleeve-to-housing interface |
| 0732611049 | FILTER INSERT | Removes contaminants from hydraulic fluid |
| 0634303718 | O-RING | Secondary seal for pressure ports |
| 0636610082 | STUD | Threaded rod for housing attachment |
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