TM 5-3825-226-24
VALVE OPENING PRESSURE (VOP) SPECIFICATIONS
1500 to 2600 psi
(10,300 to 17,690 kPa)
III. Flush the Nozzle
1.
Close gauge protector valve (E). Close on-off
valve (F). Open pump isolator valve (G).
NOTE: Make sure nozzle extends inside and below the
top of FT1384 Extension (R).
2.
Operate the pump rapidly for three full strokes.
IV. Tip Leakage Test
1.
Remove all fuel from the nozzle tip and body
with a cloth.
2.
Put a clean cloth around the top of the body of
the fuel injection nozzle (pressure screw end) to
take in the leakage and prevent any fuel
leakage to drain down to the tip of the nozzle.
CLOTH ON TOP OF NOZZLE
E. Gauge protector valve. F. On-oft valve. G. Pump
Isolator valve.
3.
Open gauge protector valve (E). Be sure the
nozzle tip is completely dry.
4.
Make and hold for 15 seconds a pressure of 200
psi (1380 kPa) less than the opening pressure
measured in VOP Test 11.
5.
If nozzle is not within specification, DO NOT
USE THE NOZZLE.
TIP LEAKAGE SPECIFICATION
No more than 20 drops can fall in 15 seconds
V. Orifice Restriction Test
1.
Close gauge protector valve (E) and on-off
valve (F). Open pump isolator valve (G).
2.
Point the tip of the fuel injection nozzle into the
8S2270 Fuel Collector and FT1384 Extension.
3.
Make a slow increase in pressure and look at
the
orifice
discharge
pattern
(shape
of
discharge) when fluid begins to flow through the
fuel injection nozzle. The discharge must be the
same through all four orifices. Any change,
either vertically or horizontally, is an indication
of a bad nozzle.
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