ZF 4699.841.010 GK26LD | OEM Genuine Part

Overview

The ZF 4699.841.010 GK26LD is a genuine OEM transmission component engineered for heavy-duty construction machinery. This part functions as a critical hydraulic control unit within the valve body assembly, regulating oil flow to the clutch packs and ensuring precise gear engagement. The SKU 4699.841.010 is specifically designed to maintain optimal pressure modulation in ZF powershift transmissions, directly influencing shift quality and torque distribution. When installed correctly, this component works in concert with the 4699101086 HOUSING and 4699301223 HOUSING to form a sealed hydraulic circuit that withstands extreme operational loads.

Symptoms of Failure

• Erratic gear engagement under load: When the 4699.841.010 wears internally, operators notice delayed or harsh shifting during excavation or grading, often accompanied by a momentary loss of drive power.
• Hydraulic fluid seepage at valve body interface: Degraded sealing surfaces cause oil to weep around the mounting flange, leaving visible residue on the transmission casing and leading to gradual pressure loss.
• Intermittent transmission slipping in reverse: A failing GK26LD unit may cause the machine to momentarily lose reverse gear engagement on inclines, a symptom that worsens as operating temperature rises.
• Increased shift shock during direction changes: Worn internal spools produce abrupt clutch engagement, creating audible clunking noises and reducing operator comfort during repetitive forward-reverse cycles.

Technical Specifications

Compatibility

This genuine ZF 4699.841.010 component is compatible with the following transmission models commonly found in construction machinery: WG180, WG200, WG210, and WG240 series. It also fits select variants of the Ecomat 4HP and 6HP transmissions used in wheel loaders and excavators. The part interfaces directly with the 0501319149 SCREW PLUG for pressure port sealing and requires the 0634801038 SEALING RING for leak-free installation. Always verify your transmission serial number against ZF application guides before ordering.

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