855531 Mercury COVER

Illustration 1 g00995886
Gear train
(1) Fuel injection pump drive gear Tighten the nut to the following torque. ... 24 N m (18 lb ft) Release the lock on the fuel injection pump shaft. Torque the nut to the following torque. ... 90 N m (66 lb ft)Number of teeth ... 68Note: Refer to the Specifications, "Fuel Injection Pump" for the locking torque for the fuel injection pump shaft. (2) Camshaft gear Tighten the bolt for the camshaft gear to the following torque. ... 95 N m (70 lb ft)Bore diameter of the camshaft gear ... 34.93 to 34.95 mm (1.3750 to 1.3760 inch)Outside diameter of the camshaft hub ... 34.90 to 34.92 mm (1.3741 to 1.3747 inch)Clearance between the camshaft gear and the camshaft hub ... 0.003 to 0.048 mm (0.0001 to 0.0019 inch)Number of teeth ... 68 (3) Idler gear and hub Tighten the bolts for the idler gear to the following torque. ... 44 N m (33 lb ft)Bore diameter of the idler gear ... 57.14 to 57.18 mm (2.2495 to 2.2512 inch)Bore diameter of the idler gear with roller bearings ... 72.35 to 72.36 mm (2.8484 to 2.8488 inch)Width of idler gear and split bearing assembly ... 30.14 to 30.16 mm (1.186 to 1.187 inch)Inside diameter of idler gear bearings with flanges ... 50.78 to 50.80 mm (1.999 to 2.000 inch)Outside diameter of idler gear hub ... 50.70 to 50.74 mm (1.9961 to 1.9976 inch)Outside diameter of idler gear hub with roller bearings ... 49.975 to 49.988 mm (1.9675 to 1.9680 inch)Clearance of idler gear bearing on hub ... 0.04 to 0.10 mm (0.0016 to 0.0039 inch)Idler gear end play ... 0.10 to 0.20 mm (0.004 to 0.008 inch)Idler gear end play with roller bearings ... 0.10 to 0.75 mm (0.0039 to 0.0295 inch)Maximum permissible end play ... 0.38 mm (0.015 inch)Number of teeth ... 73
Illustration 2 g00996214
The gear train for the oil pump
(4) Crankshaft gear Bore diameter of crankshaft gear ... 47.625 to 47.650 mm (1.8750 to 1.8760 inch)Outside diameter of crankshaft hub ... 47.625 to 47.645 mm (1.8750 to 1.8758 inch)Clearance of gear on crankshaft ... −0.020 to +0.020 mm (−0.0008 to +0.0008 inch)Number of teeth ... 34 (5) Oil pump idler gear Inside diameter of oil pump idler gear bearing ... 16.012 to 16.038 mm (0.6304 to 0.6314 inch)Outside diameter of oil pump idler gear shaft ... 15.966 to 15.984 mm (0.6286 to 0.6293 inch)Clearance of oil pump idler gear bearing on shaft ... 0.028 to 0.072 mm (0.0011 to 0.0028 inch)End play of the oil pump idler gear ... 0.050 to 0.275 mm (0.0019 to 0.0108 inch) (6) Oil pump gear The number of teeth on the oil pump gear ... 17Backlash values Backlash between the idler gear (5) and the oil pump drive gear (6) ... 0.046 to 0.106 mm (0.0018 to 0.0041 inch)Backlash between the oil pump idler gear (5) and the crankshaft gear (4) ... 0.095 to 0.160 mm (0.0037 to 0.0063 inch)Backlash between the idler gear (3) and the crankshaft gear (4) ... 0.064 to 0.124 mm (0.0025 to 0.0049 inch)Backlash between the camshaft gear (2) and the idler gear (3) ... 0.052 to 0.107 mm (0.0020 to 0.0042 inch)Backlash between the fuel injection pump gear (1) and the idler gear (3) ... 0.054 to 0.109 mm (0.0021 to 0.0043 inch)Backlash between the water pump gear (not shown) and the fuel injection pump gear (1) ... 0.073 to 0.133 mm (0.0028 to 0.0052 inch)Backlash between the power take-off drive ( if equipped) and the idler gear (3) ... 0.112 to 0.172 mm (0.0044 to 0.0068 inch)