5. If the nozzle is no! within specifications, DO
NOT USE THE NOZZLE.
IV. Orifice Restriction Test
Close gauge protector valve (E) and on-off valve
(H). Open pump isolator valve (K).
Point the tip of the fuel injection nozzle into the
8S2270 Fuel Collector and FT1384 Extension.
Be sure the bleed screw hole is positioned toward
the tester and is in line with 6V2170 Tube As-
sembly (C). This will make the fuel injection
nozzle be 15° from vertical and the spray pat-
tern will be horizontal.
Make a slow increase in pressure and look at the
orifice discharge pattern (shape of discharge)
when fluid begins to flow through the fuel injec-
tion nozzle. The discharge must be the same
through all nine orifices. Any change either ver-
tically or horizontally. is an indication of a bad
TESTING AND ADJUSTING
V. Bleed Screw Leakage Teat
1. Install bleed screw and seal (4) in fuel injection
nozzle. Tighten the bleed screw to a torque of 0.9
± 0.1 Nm (8 ± 1 lb. in.)
Do not tighten the bleed screw more than the
torque shown. The bleed screw or seal can be
Put the tip of the fuel injection nozzle down
inside the 8S2270 Fuel Collector and FT1384
Close on-off valve (H). Open gauge protector
valve (E) and pump isolator valve (K).
Pump the tester until fuel injection nozzle is full
of fluid and the pressure on the gauge is 27 500
kPa (4000 psi).
NOTE: 15 or 20 strokes of the pump can be neces-
sary for the pressure to get to 27 500 kPa (4000 psi).
BLEED SCREW LEAKAGE SPECIFICATION
There must be no leakage between the bleed screw and
the body of the fuel injection nozzle.
If there is leakage, replace the 8N4174 Seal.
Inspect the washer face of the bolt for damage,
replace if needed. Test the nozzle again. If there
is still leakage, the fuel injection nozzle must be
If no fuel leakage is found, the fuel injection
nozzle is acceptable. Put a new seal (3) on the
nozzle. Install a new carbon dam (2) in nozzle
groove with SS2252 Carbon Seal Tool (N).
NOTE: The 8S2252 Carbon Seal Tool must be mo-
dified before it can be used with the 8N7005 Fuel
Injection Nozzle. Special Instruction Form No.
SEHS7292 has the information needed to modify the