Usage:
3200, 3300 And 3400 Series Direct Injection Engines
Description of Change: The Caterpillar 7000 Series Fuel Injection Nozzle is used on many of the above direct injection engines. This nozzle is identified as the 7000 Series because the last four digits of the part number begin with 7. The illustration shows a typical 7000 Series Fuel Injection Nozzle.
Some of the compression seal washers used on these nozzles have changed to a copper material. The former compression seal washers, made from nylon, could lose a small amount of thickness because of installation force and operating temperatures. The new copper compression seal washers provide a more consistent holding force. The chart identifies the correct compression seal washer for each fuel injection nozzle and application. The compression seal washer and the carbon dam (seal) should be replaced each time the nozzle is tested.
Typical 7000 Series Fuel Injection Nozzle.
