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 356 of 736

TM 9-2815-225-34&P
0042 00
0042 00-2
CYLINDER BLOCK COMPONENTS INSTALLATION (Contd)
CRANKSHAFT AND MAIN BEARINGS
WARNING
Use extreme caution during assembly. Engine components are
heavy. Failure to comply may result in damage to equipment or
injury to personnel.
CAUTION
Cylinder block saddle and cap mating surfaces must be clean
and dry when bearing halves are installed, or engine damage
may result. Wipe main bearing bores, main bearings, engine
crankshaft, and related parts with a clean cloth. Ensure cloth
does not leave any particles or lint in or on parts and bores, or
engine damage may result.
NOTE
Upper main bearings have a groove and oil hole to permit
lubrication of engine crankshaft; the lower main bearing halves
do not. The upper main bearings for No. 2, 4, and 6 are the
same. The groove in upper main bearing half for No. 7 is not in
the center. Install No. 7 main bearing so wider part of the
bearing (from groove) is toward flywheel end of cylinder block.
Each main bearing has a groove. Install main bearings so
grooves will fit retaining rings.
Check for marks on crankshaft to determine size of main
bearings and thrust rings. If there are no marks, use standard
size parts.
1.
Apply lubricating oil to seven new upper main bearing halves (2) and retaining rings (3). Install
seven new upper main bearing halves (2) and retaining rings (3) on cylinder block (1).
2.
Using lifting device or lifting strap, lower crankshaft (5) on cylinder block (1).
NOTE
Ensure grooved thrust side of thrust bearing washers is against
the flange of crankshaft. Upper thrust rings are not doweled to
cylinder block. Lower thrust bearing washers are doweled to
No. 7 bearing cap.
3.
Install four new upper thrust bearing washers (4) into position on No. 7 journal of crankshaft (5).
NOTE
Lubricate contact surface of seven lower main bearing halves
and main bearing journal surface of crankshaft. Upper thrust
rings are not doweled to cylinder block. Lower thrust bearing
washers are doweled to No. 7 bearing cap.
4.
Install seven new lower main bearing halves (2) on crankshaft (5). Ensure lower main bearing
halves (2) are aligned with retaining rings (3).
5.
Position No. 1 through No. 6 bearing caps (9) on cylinder block (1).
6.
Install lower thrust bearing washers (4) on No.7 bearing cap (6).


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