F U E L S Y S T E M
T E S T I N G A N D A D J U S T I N G
temperature at an exhaust manifold port is an indica-
tion of no fuel to the cylinder. This can possibly be an
indication of a nozzle with a defect. Extra high tem-
perature at an exhaust manifold port can be an indi-
cation of too much fuel to the cylinder, also caused by
a nozzle with a defect.
The most common defects found with the fuel
injection nozzles are:
1. Carbon on tip of the nozzle or in the nozzle
2. Orifice wear.
E X T R A V A L VE
L. Gauge protector valve (must be in open position at all
t i m e s ) .
Do not test nozzles unless you have the correct
TESTING 8N7001 FUEL
*5P4150 Nozzle Testing Group.
8S2270 Fuel Collector.
8S2245 Cleaning Tool Group,
8S2258 Braaa Wire Brush.
8S2252 Carbon Seal Installation Tool.
lF1 153 Needle Nose Pliera.
5V2170 Tube Aaaembly.
7/84 Hex Wrench.
*Special Instruction Form No. SEHS7292.
5P4150 NOZZLE TESTING GROUP
1. 8N70M Nozzle Aaaembly. A. 5P7445 Adapter. B. 5P4146
Gauge, O to 6600 kPa (O to 1000 psi). C. 6V2170 Tube Aa-
aembly. D. 2P2324 Gauge, Oto34500 kPa (O to 5000 pai). E.
Gauge protector valve for 2P2324 Gauge. F. FT1364 Exten-
eion. G. Gauge protector valve for 5P4146 Geuge. H. On-
off valve. J. 6S2270 Fuel Collector. K. Pump isolator valve.
Be sure to use clean SAE J967 Calibration oil
when tests are made. Dirty test oil will damage
components of fuel injection nozzles. The tem-
perature of the test oil must be 18 to 24°C (65 to
75°F) for good test results.
Order calibration oil by part number, in the quan-
tities needed, according to the information that
6V6068 Calibration Fluid. 18.9 liter (5 U.S. gal.)
6V6067 Calibration Fluid. 208.2 liter (55 U.S.
The 8N7001 Fuel Injection Nozzle can not be
disassembled for cleaning or adjustment. Do the tests