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 168 of 736

TM 9-2815-225-34&P
0014 00
0014 00-2
CYLINDER HEAD (Contd)
DISASSEMBLY
1.
Remove locknut (23) and adjusting screw (24) from exhaust valve crosshead (22). Discard
locknut (23).
2.
Remove exhaust valve crosshead (22) and crosshead guide (21) from cylinder head (25).
NOTE
All intake and exhaust valves are removed the same. The
following procedure covers removal of one exhaust valve.
3.
Using valve spring compressor, compress exhaust valve spring (4).
NOTE
It may be necessary to tap valve lightly to loosen it.
4.
Remove two valve collets (2) from exhaust valve (15).
NOTE
If spacers are used, cylinder head has been resurfaced
previously.
5.
Remove exhaust valve (15), spring retainer (3), valve spring (4), and spacer (5), if used, from
cylinder head (25). Discard exhaust valve (15), valve spring (4), retainer (3), and spacer (5).
6.
Remove valve stem guide (6) from cylinder head (25). Discard valve stem guide (6).
7.
Using valve seat extractor, remove valve seat insert (14) from cylinder head (25). Discard valve
seat insert (14).
8.
Perform steps 1 through 7 for remaining exhaust and intake valves.
9.
Using injector sleeve puller, remove two injector sleeves (8) and injector O-rings (7) from cylinder
head (25). Discard injector O-rings (7).
10.
Remove two screws (20), cover plate (19), and two O-rings (18) from cylinder head (25). Discard
O-rings (18).
11.
Remove four pipe plugs (17) from cylinder head (25).
12.
Using hammer and punch, tap outside diameter of expansion plugs (12) and (16) to force one side
out from cylinder head (25).
13.
Using screwdriver, remove six expansion plugs (12), plug (16), and two plugs (26) from cylinder
head (25). Discard expansion plugs (12), (16), and (26).
14.
Remove four screws (9), two fuel connections (10), and four O-rings (11) from cylinder head (25).
Discard O-rings (11).
15.
Remove two dowels (13) from cylinder head (25).
16.
Perform steps 1 through 15 for remaining cylinder heads (25).
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 cylinder head (25) for cracks, breaks, distortion, and broken-out areas.
4.
Using straightedge and feeler gauge, inspect cylinder head (25) for distortion on mating surface.
Maximum distortion is 0.002 in. (0.051 mm).


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