Marbed 9166 Splined Socket 1/2" Drive for Bosch Pressure Valve Holders

The Marbed 9166 is a dedicated 1/2" splined socket designed for Bosch inline fuel injection pumps (PES type P). It provides the correct engagement with the splined pressure valve holders used in classic and modern Bosch pump platforms. As a direct equivalent to Bosch 0 986 611 451 and legacy code KDEP 2986, the 9166 ensures safe, precise and damage-free service operations.

Key Benefits

• Exact fit on Bosch splined pressure valve holders

• Prevents slipping, rounding or damaging the valve holder

• Works on all major Bosch inline pump families (PES-P, P7100, P8500, P3000)

• Heavy-duty construction for professional workshop use

• 1/2" square drive suitable for torque tools

Key Features

• Internal Bosch-type splined profile

• 1/2" square drive

• Hardened tool steel for maximum durability

• Smooth cylindrical body for easy manipulation

• Equivalent to Bosch 0 986 611 451 and Bosch KDEP 2986

Operational Functions

• Removal and installation of Bosch pressure valve holders

• Safe loosening of splined delivery valve assemblies

• Ensures proper seating and torque application during pump overhaul

• Suitable for inline pump calibration, repair and full remanufacturing

Technical Data

• Tool type: splined socket

• Drive: 1/2" square

• Profile: Bosch-type internal spline (pressure valve holder profile)

• Compatible systems:

  • Bosch PES-P inline pumps

  • Bosch P7100 (Cummins applications)

  • Bosch P3000, P8500 and related platforms

• Equivalent tools: Bosch 0 986 611 451, Bosch KDEP 2986

• Material: hardened alloy tool steel

• Application area: delivery/pressure valve holders on inline diesel pumps

Technical Data

• The Marbed 9167 open-end toothed wrench is the complementary tool when the pressure line remains installed, allowing access where the 9166 socket cannot reach.

Use Cases

• Diesel workshop overhaul of Bosch PES-P inline pumps

• Removal of splined pressure valve holders during pump disassembly

• Calibration and service operations on heavy-duty truck engines

• Restoration, testing or rebuilding of injection elements

• Used together with the Marbed 9167 when removal of the pressure line is not desired.

Kit Contents

• Marbed 9166 Splined Socket (single tool)

• The 9166 is also part of the Marbed 9441-A master kit for Bosch PES-P inline pumps, ensuring complete coverage for pressure valve service operations.