ZF 4644.138.009 FILTER for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.138.009 FILTER is a critical hydraulic filtration component engineered specifically for the WG 180 and WG 200 series transmissions. Positioned within the transmission’s lubrication circuit, this genuine OEM part ensures that hydraulic fluid remains free of contaminants, protecting internal valve bodies and clutch packs from premature wear. The SKU 4644.138.009 is designed to maintain optimal oil flow and pressure, directly supporting the longevity of adjacent assemblies such as the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING. Without this filter, particulate debris can bypass the system, leading to cascading damage across the drivetrain.

Symptoms of Failure

• Erratic gear engagement or slipping: A clogged 4644.138.009 filter restricts oil flow, causing delayed or harsh shifts, especially under load.
• Transmission overheating: Contaminated fluid cannot dissipate heat effectively, leading to elevated operating temperatures and potential thermal damage.
• Whining or humming noise from the pump: Reduced flow forces the hydraulic pump to cavitate, producing audible distress signals.
• Visible metal shavings in the oil pan: When the filter fails to capture debris, metallic particles circulate and accelerate wear on the 0631311009: GROOVED STUD and other precision components.

Technical Specifications

Compatibility

This genuine ZF filter is directly compatible with the following transmission models: WG 150 Series, WG 180 Series, and WG 201 Series. It is a direct replacement for the filter assembly in ZF WG180 and WG200 units, commonly used in off-highway vehicles, agricultural tractors, and construction equipment. For proper installation, always verify the condition of the 0730365125: TYPE PLATE to confirm model identification. Additionally, inspect the mounting surface on the transmission housing to ensure a leak-free seal.

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