ZF 0899.312.131 HOSE PIPE for WG250 | OEM Genuine Part

Overview

The ZF 0899.312.131 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 250 transmission series. This OEM genuine part routes hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication pressure and thermal regulation within the gearbox. As an original equipment manufacturer (OEM) component, SKU 0899.312.131 guarantees exact fitment and material integrity, preventing contamination ingress that can compromise shift quality. This hose pipe interfaces directly with the 4646101062: TRANSMISSION HOUSING and the 4646301104: HOUSING assembly, forming a sealed conduit for pressurized oil flow.

Symptoms of Failure

• Hydraulic oil seepage at hose connections: When the hose pipe degrades, fluid leaks appear near the crimped fittings or along the rubber body, often mistaken for a loose banjo bolt.
• Erratic gear engagement under load: A compromised hose pipe reduces line pressure, causing delayed or harsh shifts—particularly noticeable when towing or climbing grades.
• Overheating transmission fluid: Restricted flow through a collapsed or kinked hose pipe starves the cooler, leading to elevated sump temperatures and accelerated wear.
• Air ingestion into the hydraulic circuit: Cracks in the hose wall allow air to mix with oil, producing foaming and erratic clutch pack application.

Technical Specifications

Compatibility

This hose pipe is designed for the ZF WG 250 series but also fits select models in the WG 180, WG 200, and WG 240 families due to shared hydraulic routing architecture. It is a direct replacement for units equipped with the 4646301300: COVER and the 4646323018: CONNECTING PART assembly. Always verify the hose routing against your transmission’s serial number; variations exist between early and late production runs of the WG 250.

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