Flange for Caterpillar C6.6 / C4.4 Common Rail Pumps (with oil feed & return ports)

The Marbed 8239 flange is designed specifically for Caterpillar C6.6 and C4.4 Common Rail injection pumps.

Its integrated oil feed and return circuits replicate the original engine lubrication system, enabling safe testing and calibration on generic diesel benches.

Paired with the Marbed 8239-G coupling, it maintains oil tightness and precise shaft alignment throughout the test.

Key Benefits

• Purpose-built for Caterpillar C6.6 / C4.4 Common Rail pumps

• Integrated 3/8 GAS inlet and 1/4 GAS outlet ports for oil circulation

• Oil-tight coupling (8239-G) prevents leakage during operation

• Compatible with Marbed cradles (anti-slip system)

• Allows testing of CAT pumps on any standard diesel bench

• Robust machined-steel construction for accuracy and longevity

Key Features

• Material: machined steel

• Centering height: 125 mm (Bosch standard)

• Oil feed port: 3/8 GAS (BSP) female thread

• Oil return port: 1/4 GAS (BSP) female thread

• Anti-slip/anti-rotation interface compatible with Marbed cradles

• Sealing coupling: Marbed 8239-G

• Typical applications: industrial engines, earth-moving machines, gensets

Operational Context

During testing, the 8239 flange supplies and drains lubricating oil through its built-in threaded ports.

The Marbed 8239-G coupling ensures oil tightness between the pump shaft and bench drive while transmitting rotation.

This setup reproduces the engine’s oil circuit, preventing dry running and component wear.

Compatible with Marbed bench fixtures and standard drive systems.

Technical Data

Applications / Engines

Kit Contents

• Flange 8239 main body (machined steel)

• Oil feed and return ports (3/8 GAS – 1/4 GAS)

• Mounting bolts and gaskets

• Connection fittings for external oil lines

• (Optional) Marbed 8239-G oil-tight coupling