K-3331 Splitter Valve for Eaton Fuller RTLO Series | Tritenco Direct Replacement

Tritenco K‑3331 Splitter Valve | OE Replacement for Eaton Fuller Transmissions

Direct Fit, Heavy‑Duty Splitter Valve – Replaces S‑10291 & All Major Aftermarket Part Numbers

For fleet managers, transmission technicians, and heavy‑duty parts buyers, consistent range shifting isn’t just a convenience—it’s essential for uptime and safety. The Tritenco K‑3331 Splitter Valve is engineered to eliminate hard shifts, air leaks, and split failures that keep trucks off the road. Built as a direct OE‑equivalent replacement for Eaton Fuller transmissions, it works seamlessly with factory systems and supports reliable split‑shift performance in the harshest operating conditions.

This valve fully replaces a complete lineup of OEM and aftermarket part numbers, including Eaton Fuller K‑3331, K3331B, K‑3329, A‑6862, 4300927, 4304031, 4304032, FUL‑K3331, FURK3331, World American A6862, 3088‑K‑3331, Freightliner FUL K3331, Navistar FULK‑3331, NSFSK3331, Timken M13K‑3331, Genuine Newstar S‑10291, S10291, FUR‑K‑3331, S&S S‑10291, S10291, FUR‑K‑3331, Mack 3088‑K‑3331, and PAI 900417. Every cross‑reference part in your keyword list is fully covered and recognized.

Constructed from high‑strength alloy and precision‑machined to strict OE specifications, the K‑3331 resists corrosion, pressure fatigue, and premature wear. Each unit undergoes strict air leakage and function testing to ensure stable performance under high pneumatic pressure. Whether you’re repairing a transmission in‑shop, stocking fleet parts, or supplying distributors, you can trust Tritenco for consistent fit, dependable performance, and long service life—without the premium OEM cost.

Designed for drop‑in installation with standard mounting and port dimensions, this splitter valve reduces labor time and speeds up repairs. We focus on real‑world durability, predictable quality, and full compatibility so you can keep vehicles moving, reduce comebacks, and run your operation with confidence.

Product Overview

• Brand: Tritenco 
• Part Number: K-3331 (also compatible with FUL K3331, K3331B, A6862, etc.)
• Condition:  100%New
• Compatibility: Fits Eaton Fuller RTLO/RTLOF series transmissions (513s, 613s, 713s, 913s, 618s, 718s, 918s).
  *Does not fit RT/RTO-613 / 6613 models.
  Compatible with Mack, Freightliner, and other heavy-duty trucks.

Interchangeable Part Numbers

Key Features

• OE-Equivalent Quality: Built to meet or exceed OEM specifications for durability and consistent shifting
•  Anodized Aluminum Construction: Resists high temperatures, 60 PSI operating pressure, and corrosion
• Direct Fit Design: Engineered for exact compatibility with RTLO series transmissions
• Complete Service Kit: All-in-one kit for drop-in replacement, reducing downtime
• Seamless Integration: Works across a wide range of commercial vehicles

Technical Specifications

• Air Ports: 3x 1/8-inch NPT (inlet/outlet/control)
• Mounting: 4x 5/16-inch-18 bolts (1-7/8-inch length)
• Operating Pressure: 60 PSI (0.4137 MPa)
• Material: Anodized aluminum alloy
• Weight: 547 g (1.190 lbs)

Package Includes

• 1 x Splitter Valve
• 3 x Sealing O-ring
• 1 x Connector

Compatibility Note

• This is an aftermarket replacement part. It is designed to be compatible with and replace genuine Eaton Fuller® and other OEM part numbers listed. All trademarks are property of their respective owners.

• Backed by Tritenco's precision manufacturing and IATF 16949 quality system, the K-3331 splitter valve delivers reliable performance for fleets, repair shops, and aftermarket distributors worldwide.

• For full system optimization, we recommend pairing it with the Tritenco A-5000 Slave Valve Assembly and A-4740 Air Filter Regulator Assembly.

  Learn more about our Manufacturing capability

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Tritenco specializes in the precision manufacturing of oe quality heavy-duty truck transmission pneumatic valves. Our core product line includes the a5000 slave valve, k3331 splitter valve, and a4740 air filter regulator,

designed for reliable performance in global heavy-duty truck fleets. We also offer precision-machined components, high-precision valve stems and shafts, and custom mechanical base parts for industrial applications,

all manufactured to strict quality standards with factory-direct pricing.