Overview
The ZF 4699.004.110 GK25 is a critical OEM genuine component engineered for heavy-duty construction machinery transmissions. This part functions as a precision-machined housing element within the valve body or clutch pack assembly, ensuring proper fluid routing and pressure containment during gear shifts. The SKU 4699.004.110 is specifically designed to maintain the structural integrity of the transmission’s hydraulic circuit, preventing cross-leakage between channels. When installed alongside the 4699101025 HOUSING and 4699301078 HOUSING, it forms a sealed unit that directs oil flow to clutches and brakes. This part is machined from high-strength aluminum alloy with anodized surfaces to resist corrosion from transmission fluids.
Symptoms of Failure
- Erratic gear engagement or slipping under load: A worn 4699.004.110 can cause internal pressure loss, leading to delayed shifts or clutch slip during excavation or grading operations.
- External oil seepage around the transmission housing: Cracks or warpage in this component often result in fluid leaks near the valve body, visible as drips on the bell housing or undercarriage.
- Contaminated transmission fluid with metallic debris: Abrasion on the mating surfaces of this part generates fine aluminum particles that circulate through the system, accelerating wear on seals and bearings.
- Overheating during continuous operation: A distorted housing restricts oil flow, causing localized hot spots and triggering thermal warnings on construction equipment dashboards.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.004.110 (GK25) |
| Material | Aluminum Alloy (EN AC-42100) |
| Weight | 1.85 kg (4.08 lbs) |
| Surface Treatment | Hard Anodized (60 µm) |
| OEM Reference | ZF 4699.004.110 |
| Bolt Torque Spec | 25 Nm ± 2 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF part is designed for use in the following transmission models commonly found in wheel loaders, graders, and dump trucks:
- ZF WG180 (all series)
- ZF WG200 (all series)
- ZF WG210 (early production)
- ZF 4WG-200 (powershift variants)
It directly interfaces with the 4699301015 HOUSING COVER and 4699301085 COVER to complete the upper valve body assembly. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101025 | HOUSING | Main structural carrier for valve body assembly |
| 4699301078 | HOUSING | Secondary housing for clutch pressure regulation |
| 4699301015 | HOUSING COVER | Seals the upper valve body channel |
| 4699301085 | COVER | Protects solenoid ports from debris |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303980 | O-RING | Hydraulic seal between housing interfaces |
| 0734307407 | PROTECTION CAP | Covers unused hydraulic ports |
| 0634319161 | SHAFT SEAL | Prevents oil leakage at rotating shafts |
| 0637885612 | BREATHER | Equalizes internal pressure with atmosphere |
| 0636102023 | CAP SCREW | Fastens housing components with specified torque |
