TM 5-3805-280-24-2
Fuel System
INSPECT AND CLEAN FUEL INJECTION
35
70
NOZZLE BODY
NOTE: Unless otherwise indicated, all tools required for
nozzle cleaning can be found in the JDF13 Nozzle
Cleaning Kit.
Clean carbon stop seal groove and nozzle tip with a
nozzle cleaning wire inserted in holder (A).
Inspect tip for cracks and spray orifices for chipping and
erosion using ROS16487 Inspection Magnifier (B).
A--Holder
To clean carbon from nozzle orifices:
B--Inspection Magnifier
NOTE: Stoning the wire to provide a flat surface on one
side will help in reaming carbon from a clogged
hole.
1. Begin with a cleaning wire 0.07--0.10 mm (0.003--
0.004 in.) smaller than the nominal orifice size given in
specifications below.
Fuel Injection Nozzle Tip Orifice--Specification
Number of Orifices Per Nozzle ................................................................ 4
Fuel Injection Nozzle Tip Orifice (Naturally Aspirated Engines)--
Specification
ID .............................................................................. 0.27 mm (0.0106 in.)
Fuel Injection Nozzle Tip Orifice (Turbocharged Engines)--
Specification
ID .............................................................................. 0.29 mm (0.0116 in.)
NOTE: In a few applications, RE60062 Nozzles (normally
used on aspirated engines), may be specified for
turbocharged (T or H) engines. In these cases,
use specifications listed for naturally aspirated (D)
engines.
2. Clamp the wire in pin vise from nozzle cleaning kit.
Wire should not protrude from the vise more than 0.8
mm (1/32 in.).
3. Insert wire in orifice and rotate.
Continued on next page
RG,35,JW7590
1920NOV971/3
13-449
