
Accessory Drive Assembly Timing
Position the accessory drive shaft dowel pin at the 12:00 o’clock position.
Align the timing mark on the accessory drive gear with the timing mark on the camshaft gear.
Backlash Between the Accessory 0.05 MIN 0.002
Drive and the Camshaft Gear 0.50 MAX 0.020
Note: If the backlash is not within specifications, the gear must be replaced.
Backlash Between the Lubricating 0.05 MIN 0.002
Oil Pump Drive Gear and the 0.50 MAX 0.020
Camshaft Gear
Note: If the backlash is not within specifications, the lubricating oil pump drive gear must be
replaced.
Vibration Damper Eccentricity T.I.R. 0.10 MAX 0.004
Vibration Damper Face Alignment
(‘‘Wobble’’) T.I.R.
0.18 MAX 0.007
Flywheel Bore Runout T.I.R. 0.127 MAX 0.0050
Radius (A)
mm in
Flywheel Face Runout T.I.R. 203 8 0.203 MAX 0.008
254 10 0.254 MAX 0.010
305 12 0.305 MAX 0.012
356 14 0.356 MAX 0.014
406 16 0.406 MAX 0.016
Specifications Engine Assembly - Specifications
NT 855 Page 18-11
Part or Assembly Ref. Point mm in
Perfect..