Fuel-injected engines are used to power medium and heavy John Deere equipment, such as tractors, loaders and combines. Periodic engine maintenance includes servicing the injectors for reliable fuel delivery. Dirty fuel filters or low-grade diesel fuel can clog fuel injector nozzles to the degree that replacement is necessary. Replacing a RE531334 injector requires mechanical aptitude and special tools you obtain through diesel engine service centers that carry the injectors. Injector tools are produced by a variety of manufacturers. Regardless of the manufacturer, obtain the tools that are compatible with the RE531334 injector.
Park the equipment in a ventilated area and set the parking brake. Remove the engine cover.
Remove the air cleaner assembly to provide access to the injector. Depending on the particular engine, it might be necessary to disconnect one or more exhaust recirculation hoses to remove the assembly.
Detach the heat-signal wire from the outer end of the injector by depressing tabs on the connector. Move the connector and signal wire out of the way.
Remove the secondary retainer ring at the base of the injector with a ring-clip tool. Save the retainer ring. Loosen the injector with a socket and ratchet until it spins in the injector port on manifold.
Attach an injector puller onto the end of the injector. Fit the stems of the tool against the manifold at each side of the injector. Hold the tool in place with one hand as you turn the handle clockwise until the stems remain in place.
Slide a length of 1/2-inch pipe onto the handle as a lever. Turn the handle clockwise with the pipe to remove the injector.
Fit the tip of the new RE531334 injector nozzle into the rubber cup on an injector installation tool. Fit the large end of the injector into the port where the old injector was removed.
Slide the circular driver on the installation tool up the rod to the base of the handle. Hold the handle with one hand as you slide the driver down the stem several times with moderate force to seat the injector in the port. Remove the tool from the tip of the injector.
Tighten the injector with the socket and ratchet. If the injector spins and doesn’t tighten, it is not fully seated against the upper rim of the threads in the port. Reattach the installation tool and seat the injector. Tighten it with the socket and ratchet.
Fit the saved secondary retainer ring at the base of the injector with the ring-clip tool. Connect the heat-signal wire to the injector. Reattach the air cleaner assembly and reconnect any hoses, as necessary. Fit the engine cover into place.
