ZF 1311.304.078 INTERMEDIATE RING | OEM Genuine Part

Overview

The ZF 1311.304.078 INTERMEDIATE RING is a precision-engineered OEM genuine component designed to maintain critical axial spacing and alignment within the planetary gearset of heavy-duty ZF transmissions. Positioned between the main shaft assembly and the shift system, this ring ensures that rotating elements remain securely located under high torque loads. The SKU 1311.304.078 is manufactured to exacting ZF tolerances, preventing metal-to-metal contact that can lead to premature wear. In construction machinery transmissions, this intermediate ring acts as a load-bearing spacer that absorbs vibration and distributes clamping forces evenly across the gear train. When replacing this part, it is common to also inspect the 2094104412 MAIN SHAFT and the 2094106010 SHIFT SYSTEM for signs of scoring or fatigue.

Symptoms of Failure

• Transmission oil leaks near the intermediate housing: A worn or cracked intermediate ring can allow hydraulic fluid to bypass seals, resulting in visible drips or wet spots around the bell housing.
• Gear slipping under load: When the ring loses its dimensional integrity, axial play increases, causing the gearset to momentarily disengage during heavy excavation or grading operations.
• Metallic grinding noise during shifting: A failed intermediate ring permits the main shaft to contact the shift system components, producing a distinct grinding sound that worsens with transmission temperature.
• Excessive end-play in the main shaft: Measurable axial movement at the output flange often traces back to a collapsed or deformed intermediate ring, requiring immediate replacement of both the ring and the 2094304054 MAIN SHAFT.

Technical Specifications

Compatibility

This intermediate ring is engineered for use in ZF’s heavy-duty powershift transmission series commonly found in wheel loaders, graders, and excavators. Based on its design and dimensions, the 1311.304.078 is compatible with the following ZF transmission models:

• ZF WG180
• ZF WG200
• ZF WG210
• ZF 4WG-200
• ZF 6WG-250 (early variants)

During installation, always verify the condition of the 2094206001 GEARSHIFT SHAFT and replace if any wear is detected.

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