ZF 4699.805.009 GK30 | OEM Genuine Part

Overview

The ZF 4699.805.009 GK30 is a critical internal component designed for heavy-duty construction machinery transmissions. This OEM genuine part functions as a precision-machined gear or clutch hub element within the planetary gearset assembly, directly influencing torque distribution and shift timing. The SKU 4699.805.009 is engineered to withstand extreme axial loads and thermal cycling common in excavators, loaders, and graders. Positioned between the main shaft and the clutch pack, this part ensures synchronized engagement during power shifts. For complete assembly integrity, it is installed alongside the 4699101044 HOUSING and the 4699301111 HOUSING, which provide structural support and fluid routing.

Symptoms of Failure

• Delayed or harsh gear engagement: When the 4699.805.009 wears, operators notice a pronounced lag when shifting from neutral to drive, often accompanied by a metallic clunk.
• Intermittent transmission slipping under load: A worn GK30 component fails to maintain clamping force, causing the transmission to momentarily lose power during uphill climbs or heavy digging.
• Contaminated transmission fluid with metallic debris: Friction from a degraded part generates fine steel particles visible in the oil filter or drain pan, indicating internal wear.
• Unusual whining or grinding noise from the bell housing: As the part loses its surface hardness, it produces a high-pitched noise that intensifies with engine RPM.

Technical Specifications

Compatibility

This ZF 4699.805.009 GK30 is primarily utilized in the following ZF transmission families used in construction machinery: WG180, WG200, WG210, and WG211. It also appears in select Ecomat 4HP and 6HP variants adapted for off-highway applications. The part is interchangeable between series when used with the correct 4699301054 HOUSING COVER and 4699301055 COVER to ensure proper sealing and alignment.

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