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 - Page 364 of 736

TM 9-2815-225-34&P

0042 00

0042 00-10

CYLINDER BLOCK COMPONENTS INSTALLATION (Contd)

ACCESSORY DRIVE HOUSING

NOTE

Rotate crankshaft clockwise when facing front of crankshaft.

1.

Turn crankshaft (5) in direction of engine rotation until No. 1 cylinder is at Top Dead Center

(TDC) of compression stroke (6).

2.

Turn crankshaft (5) in direction of engine rotation to 90° past TDC (7).

3.

Position accessory drive housing (3) and new gasket (2) on cylinder block (1). Ensure that timing

mark on accessory drive gear (9) lines up with timing mark on camshaft gear (8). This alignment

is necessary so that valve and injector adjustments marks on accessory drive pulley will be

correctly aligned.

4.

Install five bolts (4) on accessory drive housing (3). Tighten bolts (4) 40–45 lb-ft (54–61 N

•

m).

5.

Install dial indicator on front of cylinder block (1) and position tip of dial indicator against tooth of

accessory drive gear (9).

6.

Rotate accessory drive gear (9) as far as it will freely move. Ensure camshaft gear (8) does not

move.

7.

Turn dial on indicator to zero and rotate accessory drive gear (9) in opposite direction. Reading on

dial indicator shows amount of backlash between gears.

8.

Normal backlash between new accessory drive gear (9) and new camshaft gear (8) is

0.004–0.016 in. (0.102–0.406 mm). Backlash for new accessory drive gear (9) must be at least

0.002 in. (0.051 mm). If backlash is more than 0.016 in. (0.406 mm), remove accessory drive

housing (3) and replace accessory drive gear (9).