Overview
The ZF 4699.801.240 GK10LD is a genuine OEM gear shift unit designed for heavy-duty construction machinery transmissions. This precision-machined component functions as the primary shift actuator within the transmission valve body, directing hydraulic pressure to engage specific gear sets. The SKU 4699.801.240 is integral to the GK10LD shift module, which interfaces directly with the transmission control system to ensure smooth, reliable gear changes under extreme load conditions. As a wear-critical part, it directly influences shift timing and clutch pack engagement in ZF drivetrains.
Symptoms of Failure
- Delayed or harsh gear engagement – When the 4699.801.240 wears internally, hydraulic pressure drops, causing a noticeable lag when shifting from neutral to drive or reverse. Operators often report a “clunk” or jolt during engagement.
- Intermittent gear slipping under load – A failing GK10LD unit may allow the transmission to slip out of gear when climbing grades or hauling heavy loads, particularly in WG180 and WG200 series transmissions.
- Hydraulic fluid contamination – Worn seals within the 4699.801.240 can shed debris into the transmission oil, leading to clogged valve bodies and erratic shift patterns. Visible metal particles in the oil filter are a common indicator.
- Transmission stuck in one gear – Complete failure of the shift actuator can lock the transmission in a single gear, requiring immediate replacement of the GK10LD assembly to restore function.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4699.801.240 |
| OEM Reference | ZF GK10LD |
| Material | Hardened alloy steel with anodized aluminum housing |
| Weight | 1.8 kg (4.0 lbs) |
| Dimensions (L x W x H) | 145 mm x 95 mm x 75 mm |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Seal Type | Nitrile rubber O-rings (DIN 3771) |
Compatibility
This genuine ZF 4699.801.240 GK10LD shift unit is engineered for use in the following ZF transmission models commonly found in construction machinery: WG180, WG200, WG210, and WG250. It is also compatible with select variants of the Ecomat series (4HP and 5HP) used in wheel loaders and excavators. Always verify your transmission serial number before installation.
Related Components
When replacing the 4699.801.240, it is recommended to inspect and replace adjacent wear items in the same assembly. The 4699001238 GK10LD shift module works in tandem with this part. The 4699101108 HOUSING encloses the shift mechanism, while the 4699102172 INPUT shaft and 4699103058 OUTPUT shaft connect to the gear train. Sealing components like the 0634306309 O-RING and 0630513065 SNAP RING are critical for preventing leaks.
Related Components Table
| Part Number | Name | Function |
|---|---|---|
| 4699001238 | GK10LD | Shift module assembly |
| 4699101108 | HOUSING | Encloses shift actuator |
| 4699102172 | INPUT | Input shaft connection |
| 4699103058 | OUTPUT | Output shaft connection |
| 4699105108 | TURNTABLE BEARING | Rotary support bearing |
| 0501329881 | HOUSING COVER | Seals housing opening |
| 0630513065 | SNAP RING | Retains shaft position |
| 0634306309 | O-RING | Hydraulic seal |
| 0637885612 | BREATHER | Pressure equalization |
| 0769100082 | TYPE PLATE | Identification label |
