Dacia SuperNova (engine E7J). Service manual — part 53
CV JH3 - 050
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MANUAL GEARBOX
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The differential of the JH3050 gearbox is the simple type (with two satellites and two planetary
wheels, one of which making a common body with the tulip of the planetary transmission).
This differential is supported in the clutch – differential crankcase by means of two cylindrical
bearings equipped with balls of various sizes.
The two bearings are pressed in the clutch – differential crankcase.
The crown of the main transmission is assembled by hooping, on the differential crankcase.
DIFFERENTIAL DISMOUNTING
This operation is performed after separating the crankcases.
The zero ring (1) is removed from the right planetary shaft, then by means of a pins extractor
and a hammer, the sealing gasket (2) is gently hit with a hammer in order to make it pivoting.
The oil seal ring is carefully pulled along the grooved part of the planetary pinion in order
not to deteriorate the grooves.
GEARBOX DISMOUNTING
DIFFERENTIAL
CV JH3 - 050
21
MANUAL GEARBOX
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The stopping safety device (A) is extracted, by means of a pincers from the differential crankcase
( press on clutch crankcase in order to release the safety ring).
The differential assembly is dismounted using a press, by means of a bushing C.V. 554 ( the
bushing is pressing on the differential crankcase).
Dismount the spacer washer (5) and the elastic concave washer (6).
The crown of the speedometer (8) is dismount from the outside of the differential frame.
Remounting of the differential assembly is performed in the reverse order of the dismounting
operations, only this time the spacer that is mounted between the lateral surface of the crown and
the support bearing, shall be positioned with the concave side towards the crown.
REMOUNTING THE DIFFERENTIAL
5
GEARBOX DISMOUNTING
CV JH3 - 050
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MANUAL GEARBOX
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DIFFERENTIAL BEARINGS REPLACEMENT
DISMOUNTING
In order to extract the big bearing (7), of the differential from the clutch-differential crankcase,
a profiled metallic strap is used, which is pressed by means of an extension, at a press.
In order to dismount the other bearing (10), first extract the safety (9), then press with a press
on the bearing by means of a sleeve with the outer diameter of 50 mm, towards the inside of the
clutch-differential crankcase.
DISMOUNTING
In case of the bearing (7), its cage C must
be oriented towards the opposite side of the
differential crown.
In order to press this bearing into the clutch
crankcase, the C.V. 1059 device is used,
which is pressing on the outer ring of the bear-
ing.
When remounting the other bearing (10),
its cage C must be oriented towards the op-
posite side of the differential crown.
For pressing, the 65 mm diameter sleeve
of the C.V.1059 device is used, which is
pressing on the outer ring of the bearing
Remount the bearing maintaining safety.
7
C.V. 1059
GEARBOX DISMOUNTING
CV JH3 - 050
21
MANUAL GEARBOX
21 - 23
DIFFERENTIAL ASSEMBLY MOUNTING IN THE CLUTCH CRANKCASE
The differential assembly is pressed into the crankcase, then the stopping safety device (3) is
mounted on the planetary shaft by means of the C.V. 946 device.
Rotate the differential assembly and check the speedometer pinion rotation.
Remounting of the C planetary oil seal ring is performed after this has been oiled, by means of
the C.V. 945 device and the A protector.
Mount the oiled protector A, on the planetary pinion and position the oiled seal (C) by means
of the B device.
GEARBOX DISMOUNTING
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