892-0000010B OM
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Filling of oil in the axle beam is carried out up to the lower edge of filler hole through
plugs 41 installed in tube 14 and 22. Oil drain from the axle beam is carried out by unscrew-
ing drain plug 26 in the FDA body. Filling through the hole in one of the tubes is carried out
until oil in the second tube reaches lower edge of the filler hole. Filling of the FDA shall be
carried out on a horizontal surface.
Hole for plug 25 serves for checking of the adjustment of the main gear meshing.
Oil leakage from the main gear cavity and axle beam is prevented by the gaskets and
rubber rings, mounted in the cages, tube and in the drive gear cage.
To prevent formation of high oil back pressure in front of the gasket of the drive gear,
wiper ring 31 is installed on its spline end. Over the outer diameter of the ring spiral grooves
are cut. In cage 12 sliding bearing with crisscross grooves is installed.
Body 21 of the front driving axle is connected to the beam by two hollow axes 24, on
which the axle together with wheels can oscillate in transverse plane, deviating for angles
limited by stops of ribs in tubes 14 and 22 when they contact tractor beam. Axes are locked
by planks 23 against axial movement.
3.16.2.2 Wheel gear group of spur planetary type
Wheel gear groups of spur planetary type are designed to transmit torque from the
FDA differential to drive steering wheels. The composition of the wheel gear group of spur
planetary type is shown in Figure 3.16.5.
The wheel gear groups are mounted in casings 35 (Figure 3.16.5) and are con-
nected to the axle beam by means of axes 3 (Figure 3.16.4) and can turn relative to the
FDA beam on two bearings 9. Connection of axes with the wheel gear group casing is car-
ried out by bolts 4. Screw 38 and locknut 37 serve for adjustment of turning angle of the
wheel gear groups.
Greasing of axes pivots is carried out through grease fittings 6, installed on the
axes. The grease fittings are protected against dirt entry by rubber caps 5. To prevent dirt
entry to the pivot bearings cups 8 with sealing rubber rings 7 are mounted in the axle
beam tubes. Adjustment of pivot bearings 9 is carried out by shims 2, located only under
upper axes 3.
Wheel gear group 1 consists of twin joint 24 (Figure 3.16.5), of spur and planetary
gear, wheel flange 1, levers and brackets of front wheels 43, 44 (Figure 3.16.4) steering
control.
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