Dacia Pick-Up 1304/1305/1307. Service manual - part 84

33

REAR BEARING ELEMENTS

33 - 27

CAST IRON REAR DRIVE AXLE DIFFERENTIAL

From the back part of the  axle dismount the

cap of the axle , by unscrewing the fourteen M 8
screws.

Remove the G 3 – 36 and G 5 – 36 elastic

pins of the slotted bushing , by means of the 31
B set of mandrels, marking the position of  the
bushing and shifting it towards the exterior.

Dismount the adjustment nuts retainers, mark-

ing the position of the nuts in correspondence
with the casing.

Unscrew the bearings nuts.
Dismount the bearings half casings by

unscrewing the M 10 screws.

Remove the differential gear assembly from

the rear axle casing, together with the two bi-
conical balls bearings.

From the back part of the axle also remove

the differential drive pinion together with the 35
x 80 x 32,75 conical balls bearing.

Dismount the two opposite screws that

attach the rim.

Depress the bearings by means of the

CV 28 A provided with CV 48 grippers.

Dismount the rim ; the screws shall not be

reused.

REAR BEARING ELEMENTS

33

33 - 28

 CAST IRON REAR DRIVE AXLE DIFFERENTIAL

Dismount the attachment elastic pin of the

differential pinions shaft  by  means of  the 

φφ

φ

φ 5

CV 31 B 

mandrel.

Dismount:

- the differential  pinions shaft ;
- the differential pinions;
- the differential pinions bushings;
- the propeller shaft pinions.

Recover the support washer of the

propeller shaft pinion opposite to the rim.

DIFFERENTIAL REMOUNTING

Perform the dismounting operations in the reverse order, to remount the differential.
Before mounting,  the component parts in the differential casing shall be  lubricated with T 80

or T 90 oil.

Mount the following parts in the casing :

- the propeller shaft pinion opposite to the rim, after attaching on the  former the support

washer;

- place the two differential pinions together with their respective bushings oriented with the

locking notch towards the exterior;

- place the differential pinions in such a way that the pin hole corresponds with the hole in

the casing.

33

REAR BEARING ELEMENTS

33 - 29

 

CAST  IRON REAR DRIVE AXLE DIFFERENTIAL

By means of a  

→ 5 mandrel, attach and push the G 5 – 40  elastic pin.

Mount the second propeller shaft pinion in the rim.
Mount the rim on the casing by means of the ten M 11 x 22 screws ( use new ,self locking

screws).

Tighten them at the moment of  9 – 11 daNm.
On the side towards the flange mount the following items:

- the adjustment washer ( the values of the adjustment washers are measured every 5/

100 and are within  the range:  1,45 – 2,85 mm )

- the bearing washer;
- the 30 x 72 x 28,75 conical balls bearing;
- the oil deflector;
- the 42 x 72 x 12 annular oil seal.

NOTE:

 When assembling the cardanic flange, check the wear of the contact surface with

the annular oil seal.

Attach the nut retainer , tighten the flange nut and lock it.
After remounting and performing the required adjustment operations, make the sealing test,

and than fill up with T 90 oil the drive axle differential casing.

T

IGHTENING

 

MOMENTS

- Axle cap attachment screws...................................................  1,5  - 2daN.m
- Tooth rim attachment  screws...................................................  9 - 11 daN.m
- The screws of the differential adjustment nuts retainers................  2 daN.m
- The differential drive  pinion nut............................................   9 - 11 daN.m

The two conical balls bearings shall be mounted by pressing on the differential casing.
Press the outer ring of the small bearing and the outer ring of the big bearing in the differential

casing; for which, previously ,the adjustment washer required  for the conical distance measure-
ment has been selected and attached.

Place the differential drive pinion in the casing; the 35 x 80 x 32,75 conical balls

bearing being already mounted on it.

The differential assembly is attached and mounted in the casing, with the bearings resting in the

half bearings.

The screws from the bearings caps shall be tightened at a moment of 4 – 5 daNm.
Tighten the bearings adjustment nuts.

REAR BEARING ELEMENTS

33

33 - 30

 CAST IRON REAR DRIVE AXLE DIFFERENTIAL

NOTE: Check the marks on the axes in correspondence with the casing.

Mark the adjustment nuts in correspondence with the casing.

When remounting the main transmission, observe the following technical conditions:

1

. The pinion and rim are lapped together.

They are inseparable.
Replacing one  part  obligatory  implies replacing of the other one.
There is a common symbol marked both on the rim and on the pinion..

2

.  The two caps bearings shall be in correspondence with differential casing.

 DIFFERENTIAL ADJUSTMENT

It is performed before and upon remounting and assumes the performance of the three types

of adjustment :

1. Check and correction of the conical distance
2. Adjustment of the differential drive pinion
3. Adjustment of the rim gearing clearance

1. ADJUSTMENT OF THE CONICAL DISTANCE

It consists in the measurement and correction of the  distance between the front face of the

differential drive pinion and the rim symmetry axis ( its value  is A = 54 mm)

The following devices shall be used:

- the chuck M, together with the comparator dial CC;
- the 18 mm spacer C.

The outer rings of the differential drive pinion  bearings are mounted in the differential casing.