Overview
The ZF 0631.610.015 SET SCREW is a critical fastening component engineered specifically for the WG 200 series transmission assembly. This OEM genuine part functions as a precision locking element, securing internal shafts and gears within the differential housing to prevent axial movement during high-torque operations. The SKU 0631.610.015 is machined to exact ZF tolerances, ensuring a vibration-resistant fit that maintains gear alignment under heavy load conditions. Positioned adjacent to the DIFF.HOUSING, this set screw works in concert with the TAPER ROLLER BEARING to stabilize rotating assemblies within the WG200 drivetrain.
Symptoms of Failure
- Transmission oil seepage around housing joints: A worn or loosened set screw can compromise the seal between the differential housing and cover, leading to gradual fluid loss and potential contamination.
- Intermittent gear slipping under load: When the 0631.610.015 fails to maintain clamping force, internal components like the DIFFERENTIAL may shift, causing momentary power loss during acceleration or hill climbs.
- Abnormal whining or knocking from the differential area: Excessive play due to a stripped or fatigued set screw allows the DIFFERENTIAL assembly to vibrate against the housing, generating distinct metallic noises.
- Increased backlash in driveline: A compromised set screw permits axial movement of gear sets, resulting in delayed engagement and harsh shifting patterns.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0631.610.015 |
| Material | Case-hardened alloy steel (DIN 1.7131) |
| Thread Size | M10 x 1.5 |
| Overall Length | 25 mm |
| Drive Type | Hex socket (6 mm) |
| Weight | 0.018 kg |
| OEM Reference | ZF 0631.610.015 |
| Torque Specification | 45 Nm (with thread locker) |
Compatibility
This OEM set screw is primarily designed for the ZF WG 200 series transmissions, including the WG180, WG200, and WG210 variants. It is also compatible with select ZF off-highway and marine gearboxes that utilize the same differential housing interface. The 0631.610.015 is a direct replacement for original equipment in applications where the DIFF.HOUSING and TAPER ROLLER BEARING are specified. Always verify your transmission model number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109006 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on shafts |
| 2093209095 | DIFFERENTIAL | Secondary differential for multi-axle systems |
| 2093309071 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631100223 | SPRING PIN | Secures set screw alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction between gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Prevents gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for torque splitting |
Frequently Asked Questions
Q: Can the 0631.610.015 set screw be reused after removal?
A: ZF recommends replacing this set screw with a new OEM part whenever the differential housing is disassembled. The thread-locking compound and case-hardened surface degrade after initial torque application, increasing the risk of loosening during operation.
Q: What torque should I use for the ZF 0631.610.015?
A: The specified tightening torque is 45 Nm with a medium-strength thread locker applied to the first three threads. Over-torquing can strip the threads in the DIFF.HOUSING, while under-torquing may allow the set screw to back out under vibration.
Q: Does this set screw fit the WG180 transmission?
A: Yes, the 0631.610.015 is compatible with WG180, WG200, and WG210 models that share the same differential housing design. Always cross-reference your housing part number with the DIFF.HOUSING specifications to confirm fitment.
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