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 390 of 736

TM 9-2815-225-34&P
0043 00
0043 00-6
CYLINDER HEAD AND CYLINDER HEAD COMPONENTS INSTALLATION (Contd)
ROCKER ARM HOUSING (Contd)
NOTE
Engine cylinders are numbered in sequence, starting at front
with No. 1 cylinder. The engine firing order is 1-5-3-6-2-4.
Valves and injectors for the same cylinder are not adjusted at
same index mark on accessory drive pulley. One pair of valves
from one cylinder and one injector on a different cylinder are
adjusted at each pulley index mark before rotating accessory
drive to next index mark.
Two crankshaft revolutions are required to adjust all valves
and injectors.
8.
Using medium grit emery cloth, remove paint on timing marks (2), (3), and (4) on accessory drive
pulley (1).
9.
Rotate accessory drive pulley (1) clockwise until line in front of timing mark (2) aligns with
pointer (6) on front gear cover (5).
NOTE
Steps 10 through 16 covers adjustment for cylinder No. 3.
10.
Loosen adjusting screw nut (8) several turns.
11.
Tighten adjusting screw (9) until all clearance is removed between rocker lever (10) and injector
detent plunger.
12.
Tighten adjusting screw (9) one additional turn.
13.
Loosen adjusting screw (9) one complete turn until spring washer inside injector is against stop of
injector.
14.
Tighten adjusting screw (9) 5–6 lb-in (0.6–0.7 N
•
m).
15.
Repeat step 14 several times to make certain adjusting screw (9) is correctly tightened.
NOTE
If torque driver ST-669 is used, tighten adjusting screw nut
35 lb-ft (48 N
•
m).
16.
Prevent adjusting screw (9) from turning and tighten adjusting screw nut (8) 45 lb-ft (61 N
•
m).
NOTE
Adjustment for intake valve is similar to exhaust valve except
for valve clearance difference.
Steps 17 through 20 covers intake and exhaust valve
adjustment for cylinder No. 5.
17.
Loosen adjusting screw nut (8).
NOTE
Cold valve clearance for exhaust valve is 0.023 in. (0.584 mm)
and valve clearance for intake valve is 0.011 in. (0.279 mm).
18.
Place feeler gauge between rocker lever (10) and crosshead (11).
19.
Slowly tighten screw (9) until rocker lever (10) touches feeler gauge.


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