It Still Runs is the go-to destination for all things cars. From motors to radiators and everything in between, we've got you covered.

x

How to Remove the Fuel Pump From a Caterpillar 3406

by Contributing Writer

Caterpillar, also known as CAT, has been manufacturing heavy-duty diesel, natural gas and gasoline engines for more than 80 years. When fuel isn't getting to the engine, the fuel pump is often to blame. The pump pulls fuel from the tank and sends it through the fuel line toward the engine. The fuel is injected into the engine, where it is combusted to fire the pistons and power the engine of the Caterpillar 3406.

Step 1

Place the fire extinguisher nearby in case of accidental fuel ignition.

Step 2

Follow the fuel line from the fuel tank to the fuel pump attached to the engine.

Step 3

Detach the circular clamps on the fuel line. Take note of the "in" (from the tank) and the "out" (to the engine) directions of the pump. Pull the fuel hoses off. Clog the holes in the line with pieces of rag so debris stays out of the line and the fuel doesn't spill.

Step 4

Remove the mounting bolts with the socket wrench.

Step 5

Remove any gaskets and scrape off any gasket residue.

Bolt the new fuel pump in place and reattach the fuel lines. Be sure to push the fuel lines over the hose lips on the pump. Tighten the hose clamps. Turn on the engine to test the pump. Be sure fuel is making it to the engine.

Warning

  • Never have an open flame near fuel. Don't store fuel-soaked rags, as they can spontaneously combust.

Items you will need

  • Socket wrench
  • Socket set
  • Screwdriver
  • Rags
  • Fire extinguisher

More Articles