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 248 of 736

TM 9-2815-225-34&P
0025 00
0025 00-2
EXHAUST MANIFOLD (Contd)
0025 00-2
DISASSEMBLY
NOTE
Big Cam I engines utilize a conventional log-type exhaust
manifold. Big Cam III engines utilize a pulse-type exhaust
manifold and a new design exhaust manifold with 2 spacer
inserts. Disassembly and assembly of exhaust manifolds are
basically alike for both engines.
Exhaust manifold parts are fitted together tightly and may
require extreme force to separate.
Perform steps 1 through 3 for Big Cam I.
1.
Remove front exhaust manifold (1) and rear exhaust manifold (4) from center exhaust
manifold (2).
2.
Remove two pipe plugs (3) from center exhaust manifold (2).
3.
Remove four turbocharger mounting studs (5) from center exhaust manifold (2).
NOTE
Perform steps 4 and 5 for Big Cam III.
4.
Remove front exhaust manifold (6) and rear exhaust manifold (9) from center exhaust
manifold (7).
5.
Remove four turbocharger mounting studs (8) from center exhaust manifold (7).
NOTE
Perform steps 6 through 8 for Big Cam III new design.
6.
Remove front exhaust manifold (10) and rear exhaust manifold (14) from spacer inserts (11).
7.
Remove two spacer inserts (11) from center exhaust manifold (12). Discard spacer inserts (11).
8.
Remove four turbocharger mounting studs (13) from center exhaust manifold (12).
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 front exhaust manifold (1), (6), and (10), center exhaust manifold (2), (7), and (12), and
rear exhaust manifold (4), (9), and (14) for cracks, distortion, and corrosion.
4.
Inspect turbocharger mounting studs (5), (8), and (13) for stripped threads. Repair all damaged
threads.
5.
Inspect center exhaust manifold (2), (7), and (12) for stripped threads or damaged holes. Repair
all damaged threads and holes.


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