CORE AS 1668598 - Caterpillar

Illustration 1 g00289173 (1) Camshaft drive gear (2) Camshaft (3) Bolt and plate that holds the camshaft drive gear in position Procedure for installing the camshaft drive gearNote: Use the manual barring group to rotate the engine. The engine should be prelubed before rotating the crankshaft in order to perform service work. Rotating the crankshaft before prelube may cause damage to the crankshaft bearings if the mating surface is dry.
Rotate the engine to the Top Center Position of the compression stroke for the number one cylinder. Install the crankshaft timing pin.
If the crankshaft timing pin location is missed, do not turn the flywheel in the opposite direction to install the crankshaft timing pin. If the crankshaft timing pin location is missed, repeat Step 1.
Install the camshaft timing pin.
Put the camshaft drive gear (1) in position on the camshaft (2). Apply 4C-5592 Anti-Seize Compound to the threads of bolt (3). Install the plate and the bolt (3) hand tight. Note: Make sure that the gear taper and the camshaft taper are clean and dry. Make sure that the gear taper and the camshaft taper are free of dirt, rust and lubricants.
To prevent the crankshaft from turning, engage the Manual barring group. Tighten the locking guide to the following torque. ... 270 25 N m (200 18 lb ft)
Use a torque multiplier to tighten the camshaft bolt. Tighten the bolt to the following torque. ... 2000 275 N m (1480 200 lb ft)
Strike the plate with a hammer in order to seat the gear taper on the camshaft. Repeat Step 5.
Repeat Step 6 until there is no change in the bolt torque.
Loosen the locking guide on the Manual barring group. Verify the relation of the crankshaft to the camshaft by installing the timing pins. If both timing pins cannot be installed, loosen the bolt and the camshaft drive gear. Repeat the procedure for installing the camshaft drive gear. (4) Tighten the mounting bolts for the idler gear to the following torque. ... 270 40 N m (200 30 lb ft)When the timing pin is engaged in the crankshaft, the mounting bolts must be visible through the holes in the idler gear. (5) Small cluster idler gear Backlash between the camshaft drive gear (1) and the idler gear (5) ... 0.269 to 0.434 mm (0.0106 to 0.0171 inch) (6) Idler shaft assembly Outside diameter of shaft ... 105.840 0.020 mm (4.1669 0.0008 inch)Height to the top of the dowel in idler shaft ... 7.0 0.5 mm (0.28 0.02 inch) (7) Thickness of new thrust washer ... 9.60 0.05 mm (0.378 0.002 inch) (8) Large cluster idler gear Backlash between the idler gear (8) and the crankshaft gear (9) ... 0.304 to 0.504 mm (0.0120 to 0.0198 inch) (9) Crankshaft gear Bore in crankshaft gear ... 235.10 0.03 mm (9.256 0.001 inch) (10) Crankshaft Diameter of crankshaft ... 235.00 0.03 mm (9.252 0.001 inch)