FG Modellsport Leopard 4 Competition Mounting Instructions page 3

Position 1
Parts are in
bag C
Screw
M4x40
Ball diff. dri-
ving axle
Screw
M4x40
Diff. bevel gear
self-locking
Pressure
disk
Axial bearing
5x12x4
Diff. bevel
gear B
Spacer
disk
Diff. bevel
wheel axle
Front drive
8. Impress the bearing shafts
6x50mm into the guide pulley
16mm and centric into the too-
thed belt wheel 12 teeth.
Hint: The barrier effect of a self-locking differential gear is caused by the torque which is generated when the bevel gears press on the friction
disk respectively the spacer disk and are slowed down by the higher friction. This differential gear can be additionally locked mechanically
through the adjusting screws in the right alum. spacer disk, therefore screw them in in clockwise direction. To lock this differential mechanically,
turn in both adjusting screws symmetrically in clockwise direction. You achieve a lower barrier effect if you unscrew them anticlockwise.
All metric screws need to be secured with thread lock fluid.
Screw buffer plates to
the alum. differential hou-
sing using M4x8 counter-
sunk screws.
Alum.
differential
housing
O-ring
O-ring
large
small
Alum. differential gear 4-fold self-locking
Steel
Buffer
bush
plate
8x12x5
Friction
Needle
disk
bearing
Adjusting
screw for self-
locking diff.
Shim ring
5x17x0,1
Position 2
Parts are in
bag C
Guide pulley
16mm
Bearing
shaft 6x50
Bearing shaft
6x50
Toothed belt
wheel 12 teeth
Front left plastic
spacer disk
Ball diff.
driving axle
Ball bearing
15x28x7
Inserting of the diff.
bevel gear wheels or
of the complete pack-
age becomes much
easier if you use the
FG mounting tool Item
N°. 08505.
1. Insert diff. bevel gears B and self-locking bevel gears together with
friction disks and buffer plates in the alum. differential housing as shown
in position 1. Now lubricate both ball diff. driving axles and diff. bevel
wheel axle slightly with some grease and impress them into the alum.
differential housing. The borings of the differential housing must be in
true alignment with the borings of the diff. bevel gears. If you notice a
misalignment of the borings, take the complete package out of the diffe-
rential housing and replace the diff. bevel gears one tooth offset. Then
mount the complete package back into the diff. housing.
2. Press out the diff. bevel wheel axle slightly and push a spacer disk
between diff. bevel gear B and alum. diff. housing. Mount the second
spacer disk in the same way.
3. Press out the diff. bevel wheel axle approx. to the half. Now mount 1x
axial bearing, then both pressure disks with cone against each other to
the centre and finally the second axial bearing. Impress the diff. bevel
wheel axle completely back into the alum. diff. housing. Turn the ball diff.
driving axles and check the differential gear on smooth running. Too
much tooth clearance can be balanced with the enclosed shim rings
5x17x0,1, fix them between alum. diff. housing and spacer disks.
4. Mount the spacer disks to the alum. diff. housing using M4x8 coun-
tersunk screws, use screw retention lacquer.
5. Apply some multi-purpose grease (f.e. Item N°. 06501) on the diffe-
rential bevel gears and insert the o-ring small and large in the provided
groove of the alum. differential housing.
6. Press the front left plastic spacer disk, the front plastic toothed belt
wheel 42 teeth and right alum. spacer disk on the alum. diff. housing as
described in position 1. Fix the complete unit with the M4x40 counter-
sunk screws, use high-strength screw retention lacquer.
7. Screw the adjusting screws for the self-locking differential equally into
the right alum. spacer disk until they touch the pressure disks, use
medium screw retention lacquer.
Adjusting screw for self-
locking differential
Plastic toothed
belt wheel front
42 teeth
Right alum.
spacer disk