Overview
The ZF 0730.007.634 SHIM is a precision-engineered adjustment component designed for the WG 65 Series heavy-duty transmission. This OEM genuine shim, identified by SKU 0730.007.634, is installed between the TRANSMISSION HOUSING and the planetary gear set to establish critical axial clearances. By controlling end-play tolerances, this shim ensures optimal gear mesh alignment and load distribution within the transmission assembly. Its primary function is to eliminate excessive movement that can lead to premature wear on bearings and gears, making it a vital component for maintaining drivetrain integrity in commercial vehicles.
Symptoms of Failure
When the 0730.007.634 shim wears or is incorrectly installed, operators may notice specific performance issues. Common failure symptoms include:
- Transmission gear slipping under load – Excessive axial play causes gears to lose proper engagement, leading to intermittent power loss during acceleration.
- Low-frequency humming or grinding noises – Worn shims allow metal-on-metal contact between planetary gears and the HOUSING, producing audible vibration.
- Oil leaks near the housing interface – Incorrect shim thickness can distort the HOUSING seal surface, causing fluid seepage around the HEXAGON SCREW fasteners.
- Delayed gear engagement – Increased internal clearance reduces hydraulic pressure response, resulting in sluggish shifting from neutral to drive.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.007.634 |
| Material | Hardened spring steel (C67S) |
| Thickness | 0.50 mm (nominal) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 42.0 mm |
| Weight | 12 g |
| OEM Reference | ZF 0730.007.634 |
| Surface Finish | Phosphate coated |
Compatibility
This shim is engineered for the WG 65 Series transmission family, which includes models such as the WG180, WG200, and WG250. It is also compatible with the WG65 and WG70 variants used in off-highway trucks and construction equipment. Always verify the shim stack height against the service manual for your specific transmission model, as multiple shims (including this 0.50 mm version) may be combined to achieve the required clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 0636011118 | HEXAGON SCREW | Fastener for housing assembly |
| 4616301307 | HOUSING | Planetary carrier housing component |
| 4616301309 | HOUSING | Output shaft housing section |
| 0636011038 | HEXAGON SCREW | M10 bolt for housing retention |
| 0636016015 | HEXAGON SCREW | M12 bolt for flange mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0634313118 | O-RING | Seal between housing sections |
| 0636304019 | SCREW PLUG | Drain/fill port closure |
| 0634801152 | SEALING RING | Copper gasket for plug |
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