When mounting wheel bearings, it is extremely important
due to the safety of the vehicle as well as for the
operation of the bearing that mounting must be performed
in a dust free environment. If working is interrupted,
cover exposed bearings and seating with plastic sheeting
or similar material.
DISMOUNTING PROCEDURE
Step 1.
Raise the vehicle and remove the wheel, use axle stands
for safety.
Step 2.
Brush away any visible brake lining dust.
Step 3.
Unscrew and remove the socket-headed bolts, which secure
the drive shaft to the stub axle shaft flange. On some
vehicles the drive shaft must be removed completely.
In this case remove the hub lock nut first and remove
the socket-headed bolts, which secure the drive shafe
to the gearbox. Push the spline end of the drive shaft
out of the hub.
Step 4.
Push the drive shaft upwards to disconnect it from the
stub axle shaft and then move it out of the way.
Step 5.
Extract the split pin from the nut at the end of the
stub axle shaft, and remove the castle nut. (On some
vehicles not required).
Step 6.
Using a suitable puller, draw off the hub from the splines
of the stub axle shaft.
Step 7.
Remove the bearing ring nut or retaining circlip, whichever
is applicable.
Step 8.
Using appropriate tools, draw the bearing out of the
stub axle carrier.
INSPECTION OF COMPONENTS
Inspect the machined surface of the stub axle and the
stub axle carrier for damage. Bearings must not be replaced
on damaged seatings. The abutment shoulder of the axle
carrier must be checked for irregularities. Remove any
swarf or burrs; as these may damage the bearings and
prevent positive abutment at the shoulders.
MOUNTING PROCEDURE
Step 1.
Ensure that all components are clean. Petrol, white
spirit or a similar solvent may be used for cleaning
the components.
Step 2.
Using a mounting dolly or sleeve, press the bearing
into the bearing housing. Pressure must be exerted through
the outer ring only. The bearing outer ring must abut
the shoulder of the housing squarely.
Step 3.
Replace the bearing ring nut or retaining circlip, which
ever is applicable.
Step 4.
Press in the hub or sub axle into the bearing.
CAUTION!
Remember not to exert pressure through the bearing.
All mounting pressure must be exerted through the bearing
inner ring. Failing to do so will result in a noisy
running bearing and will greatly reduce the bearing
life.
Step 5.
The new bearing is greased, sealed and requires no further
lubrication.
Step 7.
Assembly of drive shafts is a reversal of disassembly.
MOUNTING INSTRUCTIONS FOR TAPER ROLLER BEARINGS
DISMOUNTING PROCEDURE
Step 1.
Raise the vehicle, use axle stands for safety.
Step 2.
Remove wheel and brake drum or brake caliper.
Step 3.
Brush away any visible brake lining dust.
Step 4.
Pry off grease cap.
Step 5.
Remove the split pin and castle nut (or lock nut) from
the stub axle.
Step 6.
Remove the wheel hub together with the nose washer and
the outer cone. The inner cone, larger of the two bearings,
can be removed using a commercial type puller.
Step 7.
Remove the oil seal.
Step 8.
To remove the bearing cups, drive them from the inside,
outwards by means of a suitable brass arbour or drive
tube.
INSPECTION OF COMPONENTS
Inspect the machined surface of the stub axle and the
bearing hub for damage. Bearings must not be replaced
on damaged seatings. The sealing surface of the stub
axle must be checked for wear and irregularities, which
would affect the sealing action of the oil seal. Replace
damaged components with new ones. Remove any swarf or
burrs; as these may damage the bearings and prevent
positive abutment at the shoulders.
MOUNTING PROCEDURE
Step 1.
Ensure all components are clean, taking car to completely
remove any grease as this may affect the lubricating
properties of the fresh grease. Petrol, white spirit
or a similar solvent may be used for cleaning the components.
Step 2.
Using a mounting dolly or sleeve, press the cups into
the bearing housing. The bearing cups must abut square
against the shoulder.
CAUTION!
The roller and cone assembly of each bearing must remain
with its cups. Never replace one of these components
separately. Always keep new bearings in complete sets.
Step 3.
Fill the hub cavity with wheel bearing grease until
it is 1/3 full. Pack grease on the roller and cone assembly
and bearing raceways.
Step 4.
Place the inner bearing cone in the bearing hub and
fit the seal into position. Lubricate the lips of the
seal with the same grease as used in the bearing.
Step 5.
Push the hub onto the stub axle, taking care not to
damage the seal.
Step 6.
Mount the cone assembly of the outer bearing.
Step 7.
Replace the nose washer.
Step 8.
Tighten the castle nut until the hub is slightly restrained
when rotated by hand. When tightening the nut, continuously
rotate the wheel hub. Give the wheel hub a slight tap
with a rubber mallet in order to relieve tension on
the bearings.
Step 9.
Check the position of the split pin holes. Loosen the
castle nut by a maximum of 1/12 of a turn. Check the
axle play in the bearing arrangement using, if possible,
a dial gauge. The axial should be between 0,01mm and
0,05mm.
Step 10.
Once the correct axial play has been obtained, replace
the split pin and lock it.
Step 11.
Before reinstalling the grease cap, pack grease into
it approximately 1/3 full.
IMPORTANT NOTES:
Recommended wheel bearing grease, SKF LGMT2 or any
good quality lithium based grease with a NGLI consistency
of 2 or 3.
Please consult the vehicle manufacturer's workshop
manual should any difficulties be encountered.
LIMITATION OF LIABILITY
The wheel bearing is a safety detail and the recommendations
of the vehicle manufacturer must be carefully followed.
Incorrect mounting or adjustment can cause serious bodily
injuries.
The information, recommendations, specifications and
safety instructions given above are based on the experience
and judgement of the wheel bearing manufacturing companies.
This is information, which does not cover all circumstances.
Complete mounting instructions can be found in the original
version of the vehicle manufacturer's workshop manual.
Midas Motor Parts Center recommends SKF or MOTOPART
WHEEL BEARINGS.
INDEMNITY
Remember this is for information only, for more details
consult the workshop manual for your vehicle.
