ZF 4699.841.009 GK26LD | OEM Genuine Part

Overview

The ZF 4699.841.009 GK26LD is an OEM genuine component engineered for the hydraulic control system within ZF heavy-duty powershift transmissions. This part functions as a critical valve body or distribution manifold, directing pressurized oil to actuate clutch packs and modulate gear engagement in construction machinery. The SKU 4699.841.009 sits within the transmission’s main control housing, directly interfacing with the 4699101086 HOUSING and the 4699301223 HOUSING to form a sealed hydraulic circuit. Precision machining ensures consistent flow regulation, making this part essential for smooth shifting under high torque loads.

Symptoms of Failure

• Delayed or harsh gear engagement: When the 4699.841.009 wears internally, hydraulic pressure drops, causing noticeable lag or jarring shifts during operation.
• Transmission oil leaks at the control housing: Degraded sealing surfaces allow fluid to escape past the 0636302022 SCREW PLUG or 0501319149 SCREW PLUG, leading to low oil levels and overheating.
• Intermittent clutch slip under load: Worn internal passages fail to maintain adequate pressure, causing the transmission to lose torque during excavation or grading.
• Erratic shift patterns: Contaminated or fatigued valve spools within this part produce unpredictable gear changes, especially in cold-start conditions.

Technical Specifications

Compatibility

This part is designed for ZF WG-series powershift transmissions commonly used in wheel loaders, dozers, and graders. Estimated compatible models include WG180, WG200, WG210, and WG220 series. It directly mounts within the main control housing assembly and requires proper sealing with the 0634801038 SEALING RING and 0634303996 O-RING. Always verify transmission serial number before installation.

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