ZF 4644.121.488 OIL PIPE for WG200 | OEM Genuine Part

Overview

The ZF 4644.121.488 OIL PIPE is a critical hydraulic conduit within the WG 200 series transmission, responsible for directing pressurized lubricant to the planetary gear sets and clutch packs. This OEM genuine part ensures consistent oil flow for cooling and lubrication, preventing thermal damage under heavy-duty cycles. The SKU 4644.121.488 is precision-engineered to maintain internal pressure integrity, directly supporting the 4644101216: TRANSMISSION HOUSING and 4644301223: TRANSMISSION HOUSING assemblies. Without this pipe, the transmission cannot sustain proper hydraulic circuit function, leading to rapid component wear.

Symptoms of Failure

• External oil seepage near the valve body: A cracked or corroded 4644.121.488 pipe often causes visible fluid drips, especially after thermal cycling.
• Delayed gear engagement or slipping: Insufficient lubrication from a blocked oil pipe leads to clutch pack overheating and erratic shifting.
• Low transmission fluid pressure warnings: A fractured pipe disrupts the hydraulic circuit, triggering diagnostic trouble codes for pressure loss.
• Metallic debris in the oil pan: Starvation of lubricant to planetary gears accelerates bearing wear, producing fine metal particles.

Technical Specifications

Compatibility

This oil pipe is primarily designed for the ZF WG 200 series transmissions, including models WG200, WG180, and WG150 variants used in off-highway vehicles and industrial machinery. It also fits select ZF Ecomat 2HP and 4HP series where the hydraulic circuit layout matches. Always verify the 0730365067: TYPE PLATE on your transmission housing to confirm part number cross-reference. The pipe integrates with the 0631311009: GROOVED STUD for secure mounting within the valve body assembly.

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