7.2. Check of a technical condition and coupling repair

For the control of details of coupling it is necessary:

- To check up press a disk of coupling and a cover on presence of damages or deformation. At detection of damages both details are replaced in the complete set;

- To check up reliability of spring connection of a leading disk of coupling and to be convinced that disk overlays are worn out not strongly. As cleaning of the overlays of coupling polluted by oil is impossible, it is necessary to replace a leading disk;

- To check up overlays of coupling for a possible reuse for what to measure with the help глубиномера distance from a surface of overlays to an end face of rivets. If the size makes less than 0,30 mm it is necessary to replace a disk. The disk also is subject to replacement if this size is close to the specified value;

- For check of leading disks of coupling on palpation them clamp after installation on approaching in the sizes оправку or a coupling shaft between the basic centres of a lathe. To establish стрелочный the indicator at use of suitable fastening near to a disk so that a measuring tip of the indicator adjoined to disk edge, namely to its external edge (fig. 136)

Fig. 136. Check of a conducted disk on palpation

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Slowly to scroll a disk and to define the indication стрелочного the indicator. If the indication exceeds 0,4 mm, a disk if it is necessary, it is possible to correct cautiously by means of flat-nose pliers, without damaging overlays. Otherwise to replace a disk;

- To check up landing of a nave of a leading disk of coupling on шлицах a cranked shaft. For this purpose to spread a disk on a shaft and to undertake external edge a hand, having clamped it between big and a forefinger. To move a disk in a rotation direction, putting upon it pressure that in one, in other party. If a backlash over 0,4 mm — deterioration in шлицах. The reason is covered basically in deterioration of a leading disk;

- To check up the internal ends тарельчатой springs on deterioration. If traces of deep development it is necessary to replace a casing in gathering with a press disk are visible.

Fig. 137. Check of a press disk on deterioration

The ends тарельчатой springs should be at one height within the admission of 0,5 mm. The pognutye ends can be corrected. For this purpose the special tool is usually used;

- To check up неплоскостность surfaces of a friction of a press disk of coupling. For this purpose it is necessary to put a ruler on a surface of a friction of a press disk of coupling, as is shown in fig. 138, and to measure with the help щупов a backlash. If the backlash inside makes more than 0,3 mm, it is necessary to replace coupling.

Fig. 138. Check of planeness of a press disk (to insert щуп in the specified place)