How to Remove a 12-Valve Cummins Injection Pump

Written by james marshall | 13/05/2017
How to Remove a 12-Valve Cummins Injection Pump
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The Cummins B series of diesel engines are best suited for light and medium trucks. The 6BT is a six-cylinder engine with two valves per cylinder, for a total of 12 valves. The Cummins 6BT is typically turbocharged and appears in Dodge trucks from 1994 to 1998, such as the Dodge Ram 2500. This engine uses an injection pump to keep the fuel at high pressure. The removal of the injection pump from a 12-valve Cummins engine requires the No. 1 cylinder to be in the top dead centre position.

Remove the cable from the negative battery terminal with a socket wrench. Disconnect the throttle linkage from the engine and remove the fuel drain manifold. Detach the fuel lines and the electrical wiring from the injection pump. Disconnect the fuel air control tube.

Disconnect the support bracket for the injection pump with a socket wrench. Remove the bracket for the oil filler tube from the front cover of the injection pump. Place a shop rag over the opening in the gear cover to keep debris out of the gear housing.

Connect a turning tool to the opening in the flywheel housing and attach an extension to the turning tool. Push the top dead centre pin on the flywheel housing as you turn the flywheel with the turning tool. Stop turning the flywheel when the pin drops into the gear timing hole. Remove the pin from the hole and detach the turning equipment from the flywheel housing.

Remove the lock screw and washer from the injection pump with a socket wrench. Tighten the lock screw to 22 foot-pounds with a torque wrench to hold the crankshaft in place. Pull the drive gear for the injection pump from the crankshaft with a gear puller.

Disconnect the three mounting nuts from the injection pump with a socket wrench and detach the injection pump from the engine. Remove the gasket for the injection pump and clean the mounting surface for the gasket with a shop rag.

Things you need

  • Socket wrench set
  • Shop rag
  • Turning tool for flywheel
  • Extension for turning tool
  • Gear puller for drive gear

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