Overview
The ZF 4699.303.191 SHIM RING (SKU: 4699.303.191) is a precision-engineered OEM genuine component designed for critical axial clearance adjustment within heavy-duty ZF construction machinery transmissions. This shim ring sits between the transmission housing and bearing assemblies, ensuring correct preload and gear alignment. It directly interfaces with the 4699101046 HOUSING and the 4699301109 HOUSING to maintain structural integrity under high torque loads. By precisely controlling end-play, this shim ring prevents excessive wear on adjacent components and maintains optimal gear mesh patterns throughout the transmission’s service life.
Symptoms of Failure
- Transmission gear slipping under load: When the shim ring wears or compresses beyond tolerance, axial clearance increases, causing gears to lose proper engagement and slip during heavy operation.
- Abnormal drivetrain noise (whining or clunking): A worn 4699.303.191 shim ring allows bearing race movement, producing distinct metallic sounds during acceleration or deceleration in construction machinery.
- Premature bearing failure: Incorrect shim thickness leads to improper preload, accelerating bearing fatigue and generating debris that contaminates the hydraulic system.
- Oil contamination from housing misalignment: Excessive clearance can distort the seal surface on the 4699301017 BEARING COVER, allowing transmission fluid to bypass seals and mix with external contaminants.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.303.191 |
| Material | Hardened spring steel (C67S equivalent) |
| Inner Diameter | 85.0 mm |
| Outer Diameter | 110.0 mm |
| Thickness | 1.50 mm (selective fit range available) |
| Weight | 0.045 kg |
| OEM Reference | ZF 4699.303.191 |
| Surface Finish | Phosphate coated for corrosion resistance |
| Hardness | HRC 45-50 |
Compatibility
This shim ring is engineered for ZF WG series transmissions commonly used in wheel loaders, excavators, and telehandlers. It is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG310. The part is also utilized in certain ZF 4WG-200 and 6WG-310 variants where axial clearance adjustment is required between the main housing and the 4699301085 COVER assembly. Always verify your transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Main transmission housing casting |
| 4699301109 | HOUSING | Secondary housing for clutch pack |
| 4699301017 | BEARING COVER | Seals and retains output bearing |
| 4699301085 | COVER | Access cover for valve body |
| 4699301014 | THREAD PROTECTIVE SHIELD | Protects threads during assembly |
| 0634303141 | O-RING | Hydraulic seal between housings |
| 0734307407 | PROTECTION CAP | Covers unused ports from debris |
| 0634309600 | SHAFT SEAL | Prevents fluid leakage at shaft exit |
| 0637885612 | BREATHER | Equalizes internal pressure |
| 0636102023 | CAP SCREW | Fastens housing components |
