ZF 4616.321.025 PIPE CLAMP | OEM Genuine Part

Overview

The ZF 4616.321.025 PIPE CLAMP is a precision-engineered OEM genuine component designed to secure hydraulic and lubrication lines within the WG 65 Series transmission assembly. This critical bracket prevents vibration-induced wear and maintains proper fluid flow under high-pressure operating conditions. As an original equipment part, SKU 4616.321.025 ensures exact fitment and long-term durability, reducing the risk of line abrasion or disconnection during heavy-duty cycles. It is typically mounted along the transmission casing near the oil cooler circuit, where it stabilizes pipes against chassis movement.

Symptoms of Failure

• Hydraulic fluid seepage at clamped joints — A worn or cracked pipe clamp allows lines to shift, breaking seal integrity and causing slow oil loss around fittings.
• Audible rattling or vibration from the transmission area — When the clamp loses tension, pipes can vibrate against the housing, producing a distinct metallic noise during gear engagement.
• Erratic gear engagement or delayed shifting — Loose lines can restrict fluid delivery to the valve body, leading to inconsistent clutch pack pressure and slipping under load.
• Visible corrosion or fatigue cracks on the clamp body — Exposure to heat and road salt can degrade the metal, eventually causing complete clamp failure and sudden line detachment.

Technical Specifications

Compatibility

This pipe clamp is specifically engineered for ZF WG 65 Series transmissions, including models such as the WG180, WG200, and WG250. It is also used in select WG 65 variants found in off-highway trucks, wheel loaders, and agricultural tractors. For optimal system integrity, always pair this clamp with a new 5838109012: DIFFERENTIAL and 0750117075: TAPER ROLLER BEARING when rebuilding the final drive assembly. The clamp also works alongside the 2093209023: DIFFERENTIAL and 5838300626: DIFFERENTIAL HOUSING to ensure proper line routing and clearance.

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Frequently Asked Questions

Q: Can I reuse the old pipe clamp if it looks intact?
A: ZF recommends always replacing the 4616.321.025 clamp during transmission overhaul. Even minor corrosion can reduce clamping force, leading to line movement and eventual failure under thermal cycling.

Q: Does this clamp fit WG 65 transmissions with dual oil coolers?
A: Yes. The 25.4 mm inner diameter accommodates standard cooler lines used in WG180 and WG200 models. For dual-cooler setups, two clamps are typically required—one per line.

Q: What torque should I apply to the mounting bolt?
A: Tighten the M8 bolt to 22 Nm (16 ft-lb) using a torque wrench. Over-tightening can distort the clamp and reduce its grip on the pipe.