Cartridge bearings (GEN 1)

Cartridge bearings (GEN 1)
Cartridge bearings (GEN 1)/UK/09/2015
Cartridge bearings (GEN 1)
Recommendations for
disassembly/assembly using a press
Cartridge bearing with two
rows of balls
Cartridge bearing with two
rows of tapered rollers
I. General recommendations
1) Always refer to the vehicle's service manual
2) Prepare the required materials and tools before starting the installation, make
sure that they are clean and in good condition.
3) Work in a clean and tidy area.
4) Check the kit number is correct. To avoid damage do not remove the bearing from
its packaging until it is ready to installed.
5) Check the condition of all parts related to the bearing, hub, stub axle, and drive
shaft end (no scratches or gouges) replace any damaged parts.
6) Never disassemble or separate the bearing.
7) If any abnormal noises are heard during installation, the bearing must be removed
and replaced
8) Do not loosen or tighten the drive shaft nut while the wheels of the vehicle are in
contact with the ground
9) Never lower the vehicles wheels to the ground whilst the drive shaft is loose or
removed.
10) Bearings should always be handled with care to avoid damage.
11) Always apply the fitment force through the outer ring of the bearing. The fitment
force must never be applied to the seals or inner rings of the bearing, to do so will
force the fitment force through the rolling elements (balls & rollers) causing
damage to the raceways and rolling elements. Never push against the two rings
simultaneously
12) Avoid damaging the magnetic encoder, make sure there is no damage to the
magnetic seal such as dents, scratches or cuts, keep all magnetic sources away
from the magnetic seal.
13) Use the tightening torques specified by the manufacturer, these can be found on
the product label.
II. Required tools
- Press with a capacity of at least 6 tonnes
- Flat bearing splitter
- Adaptor tube (local fabrication)
III. Removal
2. Position the stub axle on
the press, supporting it
against a tube or some
shims.
Using a tube of suitable
diameter, push against the
hub to extract it from the
stub axle.
1. Remove in sequence
- the brake calliper
- the brake disc
- the drive shaft nut
- the stub axle
Stub axle
Press
3. The bearing separates
into two parts: the one with
the inner rings stays on the
hub, and the other part of
the bearing stays on the stub
axle.
Stub axle
Stub axle
Part of the bearing
remaining in the stub
axle
Brake calliper
Drive shaft nut
Hub
Brake disc
Hub extraction tube: Its diameter
must be smaller than the bore of
the inner ring
4. If the ball ring stays on the
hub, use an extractor to pull
it off. The clamping jaw
clamps to the groove of the
inner ring of the bearing. If
the inner ring has no groove,
clamp it between the faces
of the ring and the hub.
Support tube enabling hub
removal
5. Position the extractor on
the press, supporting it
against a tube or some
shims Push with the
appropriately sized tube
used earlier (see no. 2
above), in order to remove it
from the inner ring.
Inner ring
6. If there is a
circlip, user circlip
pliers to remove
it.
Hub
Flat bearing puller
Groove of the inner
ring
Flat bearing splitter
positioned on the innerTube for extracting the inner ring
from the hub: Its diameter must
ring
be smaller than the bore of the
inner ring
Support tube enabling hub
removal
2/5
7. Put the inner ring and the ball
ring back into the outer ring
remaining on the stub axle.
Support the stub axle against a
tube or some shims and use a
tube of appropriate diameter* to
push against the inner ring of the
bearing.
*The diameter of the tube should
correspond to the contact area of
the inner ring
Stub axle
Extraction tub supported against
the inner ring
Support tube enabling bearing
removal
IV. Installation
8. The NTN-SNR kit contains all
the parts required for the
installation. It is important to
replace all components supplied
in the kit. The components are
small elements, but they
contribute to the correct function
of the bearing.
9. Before proceeding with the
installation of the new bearing,
make sure that the hub and the
stub axle are in good condition
and that the bearing seating
surfaces are clean. For ASB®
bearings, remove the protection
just before installation. Avoid
any impact against the magnetic
encoder. Avoid any contact with
dirty or magnetic surfaces.
ASB® magnetic encoder
To identify the face with the
ASB® magnetic encoder, use the
NTN-SNR testing card.
Pay attention to the
installation orientation of
the ASB® bearing
3/5
10. Place the stub axle on the
face opposite to the direction of
installation. Place the bearing at
the entrance to the seat, with
the magnetic encoder on the
side facing the interior of the
vehicle. On the press, and using
a tube of appropriate
diameter**, push against the
outer ring of the bearing. In
order to avoid damage, do not
press against the magnetic
encoder
11. If there is a circlip, install it
carefully:
- Take care not to damage the
magnetic encoder with the pliers
- Position the opening of the
retaining ring so that it allows
the sensor to pass
12. Place the hub on the press.
Take the stub axle with the
bearing and fit it onto the hub.
Using a tube of appropriate
diameter*, push against the inner
ring of the bearing till it is seated
in its final position. For ASB®
bearings, do not press against the
magnetic encoder. Near the end
of the installation, an increase in
the required force is normal.
(4 tonnes are required)
*The diameter of the tube should
correspond to the contact area of
the outer ring
Do not press against the
magnetic encoder or
inner ring whilst fitting
the bearing
4/5
13. Install the completed assembly back onto the vehicle. When
fitting the drive shaft into the hub, be careful to avoid impacts: the
drive shaft end can damage the magnetic encoder. Before fitting the
drive shaft, clean the magnetic encoder with a soft clean cloth.
Reinstall the brake disc and calliper. A torque wrench should be
used to apply the final tightening torque recommended by the
manufacturer.
To apply the final tightening torque, stop the hub from rotating,
either by applying the brake or by reinstalling the wheel and
lowering the vehicle back to the ground.
To make fitment easier
NTN-SNR print the
specified tightening torque
on its product labels.
Sensor
14. For bearings with an ASB®
magnetic encoder, clean and reinstall
the sensor.
Hub
Stub axle
Magnetic encoder
Recommendations
Follow the vehicle manufacturer’s installation procedures and apply the specified tightening
torques.
Refer to the vehicle applications in our online catalogue: eshop.ntn-snr.com
Watch the installation video for GEN1 cartridge bearings on the NTN-SNR YouTube channel:
https://www.youtube.com/watch?v=6cpnCtj7ibU
Scan this QR code to access our
technical information.
FOLLOW THE RECOMMENDATIONS
OF THE VEHICLE MANUFACTURER.
©
NTN-SNR ROULEMENTS
The contents of this document are the copyright of the publisher and
any reproduction, even partial, is prohibited without permission.
Despite the care taken in preparing this document, NTN-SNR
Roulements disclaims any liability for errors or omissions that may
slip through, as well as for losses or direct or indirect damage arising
from its use.
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