2585290 - 1024A10 CRANKSHAFT - R.R WITH ENGINE REMOVED - CHECK AND, IF NECESSARY, REPLACE MAIN JOURNALS AND CRANKPINS

Removing ( Refitting )     Op. 1004D40 ENGINE - POSITION ON STAND AND REMOVEConnect the electrical connection to the air conditioner compressor electromagnet.Remove the engine from the overhaul stand. 1. Fit the tool.

	Name	Country
1	Counter-torque	1.860.846.000

2. Undo the bolts (2a) and remove the clutch (2b).3. Undo the bolts (3a) and remove the flywheel (3b). Remove the tool.1. Undo the bolts (1a) and remove the crankcase rear cover (1b) with the oil seal integrated.2. Fit the tool. Refitting ( Removing ) Rotate the crankshaft using the tool fitted previously until the pistons of cylinders no. 1 and no. 4 are at B.D.C.1. Undo the bolts (1a) and remove the connecting rod caps (1b) for cylinders 1 and 4.2. Remove lower connecting rod bearing halves for cylinders no. 1 and no. 4.Proceed in the same way to remove the connecting rod caps and bearing halves for cylinders 2 and 3.3. Undo the bolts (3a) and remove the bearing caps (3b).4. Remove the lower main journal half-bearings. Visually inspect the condition of the main journal and connecting rod half-bearings and, if necessary, replace them.

Check one journal at a time without moving the crankshaft.

1. Fit the main journal caps complete with half-bearings. 1. Tighten the main bearing cap bolts (1a) to torque using the angular tightening tool (1b). 1. Remove the main bearing caps and measure journal backlash using a graduated measuring device.

If the reading is not within the specified range, replace the main bearing halves with new bearing halves of appropriate size and category.

Fit the thrust washers on the 3rd main bearing. 1. Tighten the main bearing cap bolts (1a) to torque using the angular tightening tool (1b). Fit the upper connecting rod half-bearings on the connecting rods.

Check one pin at a time without turning the crankshaft.

1. Apply calibrated wire (plastigage) to measure crankpin backlash. Fit the connecting rod caps with bearing halves. 1. Measure the clearance between pin and bearings using a measuring device. Then retighten the connecting rod cap bolts to torque as described previously. Fit the upper connecting rod half-bearings on the connecting rods.

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	BIG END BEARING CAPS	M9	2.5 + 60°

Rotate the crankshaft using the tool fitted previously until cylinders no. 1 and no. 4 are at B.D.C.Fit the connecting rod caps and bearing halves for cylinders 1 and 4 and screw in the bolts without tightening.

	Name	Country
1b	Protractor	1.860.942.000

Remove the tool.

	Name	Country
-	Flange	1.860.815.000

1. Fit the crankcase rear cover.

	Fastening	Component	Ø	Value(daNm)
2	Bolt	FLYWHEEL SIDE COVER	M6	0.9

2. Tighten the bolts for the crankshaft rear cover to torque.