3239074 - 1024A10 crank shaft - r + r with engine removed - check main and connecting rod bearingand replace if necessary

Removing ( Refitting ) Proceed with the removal  - 1020D17  engind front cover - r r . 1. Fit the tool.

	Name	Country
1	Counter-torque	1.820.624.000

2. Undo the bolts (2a) and remove the flywheel (2b).Remove the tool.

	Name	Country
-	Counter-torque	1.820.624.000

3. Undo the bolts (3a) and remove the crankcase rear cover (3b) integrated with the oil seal.4. Fit the tool.

	Name	Country
4	Flange	1.820.618.000

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.5. Remove the crankshaft.6. Remove the upper connecting rod half-bearings.7. Remove the upper main bearing shells.8. Remove the thrust washers from the 3rd main bearing. Refitting ( Removing ) Visually inspect the condition of the main journal and connecting rod half-bearings and, if necessary, replace them.Record the thickness of the main bearing halves

	Measurement		Value
-	Half-bearing thickness (mm)	Category B	1.839 ÷ 1.843
Category C	1.842 ÷ 1.846
Classe A	1.836 ÷ 1.840

Record the thickness of the main bearing halves

	Measurement		Value
-	Connecting rod half bearing thickness (mm)	Category B	1.530 ÷ 1.534
Category C	1.533 ÷ 1.537
Classe A	1.527 ÷ 1.531

Record the clearance between the main journals and bearing halves and crankpins and bearing halves using Plastic Gauge.The clearance between bearing halves and journals/pins must be within specified values.

	Measurement		Value
-	Clearance between crankshaft bearings - main journals (mm)		0.025 ÷ 0.052

	Measurement		Value
-	Big end bearing - crankpin play (mm)		0.025 ÷ 0.052

If the clearance is not within specified values, replace the main and/or connecting rod bearing halves as indicated  - 1004E20  engine - dismantle and re-build following operation 1004e10 - wash and check dismantled parts - re-fit cylinder head and oil sump - does not include repairs to cylinder head and auxiliary unit . Fit the upper main journal half-bearings in the cylinder block/crankcase.Fit the upper connecting rod half-bearings on the connecting rods.Fit the crankshaft on the cylinder block/crankcase.Fit the thrust washers on the 3rd main bearing.1. Fit the main journal caps complete with half-bearings.

The bearing caps have progressive references (from zero to four starting from the front of the engine) which define their fitting position.

1. Tighten the bearing cap bolts (1a) to the recommended torque using the angular tightening tool (1b).

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	MAIN BEARING CAPS	M12	(Engine crankcase side) 2.4 ÷ 2.6 +100?

	Name	Country
1b	Protractor	1.860.942.000

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.

The connecting rod caps are fitted with the number stamped on them facing the same way as the number stamped on the connecting rod (inlet side).

Do the same to fit the big end bearing caps of cylinders no. 2 and no. 3.1. Tighten the bolts (1a) for the connecting rod caps to the recommended torque, using the angular tightening tool (1b).

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	BIG END BEARING CAPS	M9	2.4 ÷ 2.6 + 60?

	Name	Country
1b	Protractor	1.860.942.000

Remove the tool.

	Name	Country
-	Flange	1.820.618.000

1. Fit the crankcase rear cover (1a) with the oil seal integrated using the tool (1b).

	Name	Country
1b	Fitting tool	1.820.619.000

2. Tighten the bolts securing the crankcase rear cover to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
2	Bolt	FLYWHEEL SIDE COVER	M6	(Engine crankcase side) 0.8 ÷ 1.0

Remove the tool.

	Name	Country
-	Fitting tool	1.820.619.000

Fit the tool.

	Name	Country
-	Counter-torque	1.820.624.000

Fit the flywheel and tighten the bolts to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	FLYWHEEL	M12	(Crankshaft side) 13.6 ÷ 16.8

Remove the tool.

	Name	Country
-	Counter-torque	1.820.624.000

Proceed with the refitting  - 1020D17  engind front cover - r r .