MTZ 1220.1, Руководство оператора

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MTZ 1220.1/1220.3 Section D. Construction and Operation
D38
means of the thrust ring (36) being in contact with the cage and from the other side – by means of
two locking rings (31, 32).
The satellites rotate on the shafts (7) mounted in the counterbores of the cage (5). The cylindri-
cal rollers (8) serve as satellite bearings. One race of the rollers is the ground surface of the shaft
(7) and another is the ground internal surface of the satellite (11).
The satellites and rollers are kept from displacement in the axial direction by the washers (10).
The force fit in the connection of the cage with the shaft is used for keeping the satellite shafts from
the axial displacement. The screw (9) turned into the grove of the shafts serves for checking the
correctness of the press-fitting and additional fixation.
The wheel flange is mounted in the two roller bearings. One of them is mounted in the reduction
gear cover (6) and the other – in the carrier (30) which is installed in the counterbore of the reduc-
tion gear casing, closed by means of the cover (28) and fastened to it by means of the bolts. An
additional gasket is inserted between the carrier and the cover.
The bearings are adjusted by tightening the nut (26). The washer (27) is placed between the
bearing (29) and the nut (26). To prevent the nut from turning out, the nut shoulder is punched in
the slot of the wheel flange.
The reduction gear casing shall be filled with oil to the lower edge of the filling hole, into which
the plug (39) is inserted (see Figure “FDA”). To drain oil, unscrew the draining plug (40).
The internal cavity of the wheel reduction gear is sealed by means of the collars (3) (see Figure
“Wheel reduction gears”) and (20). The mud trap (4) is installed for preventing the penetration of
mud to the working edges of the collar (3). The counterbores of the steering knuckle and splines of
the doubled universal joint shall be sealed by means of rubber rings (19, 23, 25). For maintaining
the normal pressure in the reduction gear cavities, the reduction gear casing is provided with a
breather (16).
1 – wheel flange; 2, 18, 29 – taper roller bearing; 3, 20 – collars; 4 – mud trap; 5 – cage, 6 – reduction gear
cover; 7 – satellite shaft; 8 – rollers; 9 – screw; 10 – thrust washer; 11 – satellite; 12 – epicyclic gear; 13 –
pin; 14 – bolt; 15 – washer; 16 – breather; 17 – driving pinion; 19, 23, 25 – rubber ring; 21 – adjusting shims;
22 – driving pinion carrier; 24 – doubled universal joint; 26 – nut; 27 – washer; 28 – cover; 30 – carrier; 31,
32 – locking ring; 33 – two-row taper roller bearing; 34 – gear block; 35 – reduction gear casing; 36 – ring; 37
– wheel nut.
Fig.D-26.
Wheel reduction gears of planetary spur-gear type