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

Tritenco K-3331 Splitter Valve Kit is an OE-equivalent direct replacement for Eaton Fuller RTLO series heavy-duty transmissions. Designed for precise fit, reliable performance, and long service life in commercial truck applications.

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

• 4300927, 3088-K-3331, A6862, FUL K3331, NSFSK3331, S10291, M13K-3331

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.