2110D20 DIFFERENTIAL INTERNAL CASING, REMOVED - DISMANTLING AND REASSEMBLY, CHECK PLANET AND SATELLITE GEARS - Fiat - CROMA - eLearn

194000451 - 2110D20 DIFFERENTIAL INTERNAL CASING, REMOVED - DISMANTLING AND REASSEMBLY, CHECK PLANET AND SATELLITE GEARS

) - Position the differential assembly in the press.1. Position tool (1a) on the differential housing and use tool (1b) to remove bearing (1c) and compensation washer (1d) from the housing on the differential casing.

Tool	Description	Function	Validity
1870845000	Extractor	Extracting bearing from differential	2.2

Tool	Description	Function	Validity
1870007000	Grip	Grip for tool for extracting bearing/fitting main shaft oil seal/fitting differential bearing race

- Remove the ring gear side differential taper bearing using the same procedure and tools as described above.

Mark the compensation washer and its seat since correct positioning is essential to calculate the new thickness or for correct refitting.

1. Undo the bolts fixing the differential ring gear.2. Because the spur gear is fitted with an interference fit on the casing, use a rubber mallet to remove the spur gear.

1. Remove the flexible retaining clip (1a) and withdraw the gearbox differential planet carrier pin (1b).2. Remove the planet gears.3. Remove the differential gears (3a) and the thrust washers (3b).

Refitting ( Removing

) - Check the condition of the planet gears and differential gears.- Fit the differential gears (3a) and the thrust washers.- Fit the planet gears.- Fit the planet carrier pin and tighten to the differential casing with the retaining clip.- Fit the ring gear to the differential case and tighten the bolts for locating the holes on the casing.- Use a rubber mallet to fit the ring gear in its seat on the differential casing.- Unscrew the retaining bolts and replace with new ones.- Apply locking compound and tighten to the specified torque.

Component	Fastening	dia	Value (daNm)	Validity
Manual gearbox-differential ring gear	Bolt	-	8.0 ÷ 9.0	2.2

1. Transfer the differential casing to the press and use the drift (1a) to fit the taper bearing (1b) in the differential casing with the old compensation washer.

Tool	Description	Function	Validity
1860770000	Fitting tool	Fitting differential conical bearings	2.2

- Fit the ring gear side differential taper bearing using the same procedure and tools as described above.

- If the differential casing is found to be excessively worn before dismantling and requires replacement, carry out the following measurements.- The following measurements are required to calculate the oversize or undersize to be aplied to the compensation washers so that the correct alignment is maintained between the differential ring gear and the layshaft gear.- Remove the differential case bearings Op. 2110D26 DIFFERENTIAL INTERNAL CASING BEARINGS - REPLACE WITH DIFFERENTIAL INTERNAL CASING REMOVED1. The procedure for calculating thickness S1 is shown below.

1. Take differential casing (1a) to the reference surface and measure height "A" (1b) between the bearing seat and crownwheel seat.- Dimeinsion "A" is indicated as "Av" for the old differential case and "An" for the new differential case.- Take more than one measurement and calculate the average value.- Also carry out the same operation on the new differential case without taper bearings.- Subtract the average height for the old differential case "Av" from the average height for the new differential case "An".- Add the value obtained for the old thickness (S1v) ("v" indicates the old casing) with its sign (absolute value) measured previously to determine the thickness of the new compensation washer S1n ("n" indicates the new thickness for the new casing).S1n = S1v + (Av - An)

1. The procedure for calculating thickness S2n (New) is shown below.

- Measure and note the thickness S2v (Old)- Measure height "B" of the differential casing between the bearing seats.1. Take differential casing (1a) to the reference surface and measure height (1b) between the bearing seats.2. Measure the heights (2a) and (2b) of the two bearing seats.

Take more than one measurement and calculate the average value.

- Take these measurements on the new differential case and the old one.- Calculate the height "B" by subtracting the height of the bearing seats from the total height.B = 1b - 2a - 2b- Perform this operation on both differential casings to give two values (Bn" (new casing height) and "Bv" (old casing height).-Subtract the average value "Bv" of the old differential casing from the average value "Bn" of the new casing.- add the result with the algebraic subtraction sign to the thickness of the new washer (S2n).- This calculation defines the thickness of the new compensation washer (S2n) and determines the correct preload of the differential inner case bearings.S2n = S1v + S2v - S1n + (bv - bn)- Apply the oversize or undersize defined previously to the compensation washer.- This means that the overall thickness of both compensation washers remains constant because this determines the preload of the differential taper roller bearings.- During adjustment, the thrust washers must be choosen to achieve the minimum possible tolerance.- If they do not display evident wear or damage, the washers may be used for the subsequent adjustment operations.- Refit the differential case bearings Op. 2110D26 DIFFERENTIAL INTERNAL CASING BEARINGS - REPLACE WITH DIFFERENTIAL INTERNAL CASING REMOVED