TM-9-2815-225-34-P

ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2005
TM-9-2815-225-34-P

  TM-9-2815-225-34-P - Page 296 of 736

TM 9-2815-225-34&P
0032 00
0032 00-2
FUEL INJECTOR (Contd)
DISASSEMBLY
WARNING
Do not perform fuel system procedures while smoking or
within 50 ft (15.2 m) of sparks or open flame. Diesel fuel is
flammable and may explode. Failure to comply may result in
injury or death to personnel.
1.
Remove top-stop locknut (2) and top-stop screw (3) from top-stop adapter (6).
2.
Remove plunger (1), washer (4), and injector spring (5) from top-stop adapter (6). Discard spring (5).
3.
Remove three gaskets (7) from top-stop adapter (6). Discard gaskets (7).
CAUTION
Do not change position of orifice plug located behind filter
screen. Orifice plug has been pre-set. Damage to injector or
improper fuel delivery will result if orifice plug is adjusted.
4.
Remove filter screen clip (13), filter screen (14), and gasket (15) from top-stop adapter (6). Discard
filter screen (14) and gasket (15).
5.
Install injector in injector stand. Using body and injector cup wrench, loosen cup retainer (12) on
top-stop adapter (6). Remove injector from injector stand.
6.
Remove cup retainer (12) from top-stop adapter (6).
CAUTION
Do not pry against machined surface when removing roll pins.
Damage to machined surface may result.
7.
Remove barrel (10) and injector cup (11) from cup retainer (12).
8.
Remove two roll pins (8) and check ball (9) from barrel (10).
CLEANING AND INSPECTION
1.
For general parts cleaning information, refer to CLEANING, WP 0051 00.
2.
For general parts inspection information, refer to INSPECTION, WP 0051 00.
NOTE
Replace any part that does not pass visual inspection or is
outside specified wear limits.
3.
Inspect cup retainer (12) for stripped threads, nicks and burrs.
4.
Inspect top-stop adapter (6) for stripped threads.
5.
Inspect top-stop adapter (6) for nicks and burrs around gasket sealing area and mating surfaces.
6.
Inspect top-stop adapter (6) for obstructions around orifice and fuel passage openings.
7.
Inspect check ball (9) for nicks and burrs.
8.
Using a depth micrometer, measure barrel (10) ball seat depth. Maximum barrel (10) ball seat
depth allowed is 0.050 in. (1.27 mm).
9.
Inspect barrel (10) for scoring, nicks and burrs.
10.
Inspect barrel (10) for carbon, burrs, distorted radius, and blockage.
11.
Inspect barrel (10) for loose or cracked fuel passages.


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