Overview
The ZF 4699.804.045 GK25 is a precision-engineered OEM genuine component designed for heavy-duty construction machinery transmissions. This part functions as a critical sealing and alignment element within the valve body or clutch housing assembly, ensuring proper hydraulic pressure distribution and preventing cross-contamination between fluid circuits. As a factory-spec replacement, the SKU 4699.804.045 restores original transmission performance by maintaining the exact tolerances required for smooth gear engagement under high-torque loads. It integrates directly with the main housing structure, working in concert with the 4699101043 HOUSING and the 4699301106 HOUSING to form a sealed, pressurized environment for clutch pack operation.
Symptoms of Failure
- Hydraulic fluid seepage at transmission housing seams: When the 4699.804.045 degrades, operators often notice oil weeping around the joint between the main case and the 4699301015 HOUSING COVER, indicating a loss of sealing integrity.
- Erratic shifting under load: A worn part can cause intermittent pressure drops, leading to delayed or harsh gear changes during excavation or grading operations.
- Visible metal debris in transmission fluid: Advanced wear of this component may produce fine metallic particles, often found during routine oil sampling or filter inspections.
- Increased operating noise from the valve body area: A loose or cracked 4699.804.045 allows vibration and hydraulic chatter, audible as a whining or knocking sound near the 4699301085 COVER assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4699.804.045 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Outer Diameter | 85 mm (estimated) |
| Inner Diameter | 42 mm (estimated) |
| Thickness | 12 mm (estimated) |
| Weight | 0.35 kg (0.77 lbs) |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF GK25 Series |
Compatibility
This genuine ZF 4699.804.045 part is engineered for use in the following transmission models commonly found in construction machinery such as wheel loaders, graders, and compactors:
- ZF WG180
- ZF WG200
- ZF WG210
- ZF 4WG-200
- ZF 6WG-250 (select variants)
It is designed to interface directly with the 4699101043 HOUSING and 4699301106 HOUSING assemblies, ensuring a secure fit within the transmission’s hydraulic control section.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101043 | HOUSING | Main structural enclosure for valve body and clutch pack |
| 4699301106 | HOUSING | Secondary housing for hydraulic control channels |
| 4699301015 | HOUSING COVER | Seals the top of the housing assembly |
| 4699301085 | COVER | Protects internal components from debris |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303980 | O-RING | Provides static seal between housing sections |
| 0734307407 | PROTECTION CAP | Covers exposed ports during transport |
| 0634309600 | SHAFT SEAL | Prevents oil leakage along rotating shafts |
| 0630502032 | RETAINING RING | Secures bearings and gears in position |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
