horsch LEEB 12 TD, Operating Instructions Manual, Page: 156 / 181

Check the wheel hub bearing
clearance (workshop work)
WARNING
Danger of crushing, shearing, cutting, cutting off,
being caught, wound up, pulled in, caught and
knocked by accidental starting and rolling away
of the tractor - machine combination.
Secure both tractor and crop protection sprayer
against accidental starting and unintended
rolling before you start working on the machine.
To check the wheel hub bearing play the axle
must be lifted until the tyres are off the ground.
Now release the brake. Place a lever between
tyres and ground and check the clearance.
Adjust the bearing play if it can be felt.
1. Dismantling the wheels and hub capsules.
2. Remove the cotter pin from the castle nut.
3. Tighten the castle nut with torque spanner
while turning the wheel hub. If an axle nut
wrench is used for this purpose, tighten the
castle nut until the freewheeling wheel hub
is slightly retarded.
4. Turn the castle nut back to the next possible
cotter pin hole. In case it is already aligned
with the hole, turn to the next hole (max. 30°).
5. Insert the cotter pin and bent it slightly open.
6. Fill some long-term grease in the hub cap-
sule.
7. Apply long-term grease on the thread of the
capsule and knock into the wheel hub or screw
down with torque spanner.
8. Assemble the wheels again.
Replacing the grease of the wheel
hub bearing
WARNING
Danger of crushing, shearing, cutting, cutting off,
being caught, wound up, pulled in, caught and
knocked by accidental starting / rolling away of
the tractor - machine combination or incorrect
jacking of the machine.
Secure the tractor and crop protection sprayer
against unintentional starting/rolling away before
beginning to work on the machine. Jack up the
machine in a safe condition and secure against
falling!
1. Jack up the machine in a safe condition and
release the brake.
2. Remove wheels and dust caps.
3. Remove the cotter pins and unscrew the
axle nut.
4. Dismantle the wheel hub with brake drum,
tapered roller bearing as well as sealing el-
ements with a suitable puller off the steering
knuckle.
NOTE
Mark disassembled wheel hubs and bearings
to prevent mixing up during re-assembly! The
inner races of the bearings with rollers must be
placed on the same hub again during assembly!
5. Clean the dismantled brake. Check the brake
at the same time for wear, intactness and
proper function. Replace worn parts imme-
diately. The inside of the brake must be kept
free of soiling and lubricants.
6. Clean the wheel hubs thoroughly from inside
and outside. Old grease must be completely
removed. Clean seals and bearings also
thoroughly and check if they can be reused.
7. Slightly grease the bearing seats and assem-
ble all parts in reverse order.
8. Carefully force on the parts to a tight fit with
the help of pipe bushings avoiding cocking
and damages during this process.
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