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11.7. Repair of a rotary fist

Rotary fist
1 – (to replace) an oil sealing ring;
2 – nave of a forward wheel;
3 – (to replace) a lock ring;
4 – wheel bearing;
 5 – brake board;
6 – rotary fist;
7 – the directing bolt of fastening of a wheel

Dismantling

PERFORMANCE ORDER
1. Remove an oil sealing ring of a nave of a forward wheel.
2. A press with a mandrel of the corresponding diameter squeeze out a nave from a rotary fist.
3. Remove a lock ring.
Prevention

If the internal ring of the bearing remains on a wheel nave, chisel internal section of a ring, to thickness of a wall of 0,5 mm. Then, the hammer and a chisel beat out the remains of internal section of a ring.
4. A press with a mandrel of the corresponding diameter squeeze out the wheel bearing from a rotary fist.
Prevention

Needlessly do not remove a brake board. If the brake board was removed, do not reuse it.
5. Note the mutual provision of a brake board and a rotary fist, for the correct repeated installation of a brake board.
6. The hammer and a chisel bring down a brake board from a rotary fist.
Prevention

Needlessly do not remove the directing bolts of fastening of a wheel. If the directing bolts of fastening of a wheel were removed, do not reuse them.
7. A press with a mandrel of the corresponding diameter squeeze out the directing bolts of fastening of a wheel from a nave.

Assembly

PERFORMANCE ORDER
1. A press with a mandrel of the corresponding diameter press the new directing bolts of fastening of a wheel in a nave.
2. Apply on a new brake board a tag on the same place, as on the removed brake board.
3. Combine a tag on a new brake board with a tag on a rotary fist.
4. A press with a mandrel of the corresponding diameter press a brake board on a rotary fist.
5. A press with a mandrel of the corresponding diameter press the new bearing of a wheel.
6. A press with a mandrel of the corresponding diameter press a nave.
Prevention

Use a new oil sealing ring. To establish a new oil sealing ring so that it was flush with an end face of a rotary fist.
7. Establish by the hammer and a special mandrel of OK993 331 016 a new oil sealing ring.