2022.3-0000010 OM
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3.2 Coupling
3.2.1 Coupling clutch
A dry-friction double-disk spring-loaded coupling clutch is mounted on the engine
flywheel 1 (figure 3.2.1).
The clutch driving part is a flywheel 1, a pressure plate 3 and a center plate 2, hav-
ing three tenons on outer surfaces, which intrude into special mortises of the flywheel 1.
The clutch driven part consists of two driven plates 24 with torque vibration dampers 9,
mounted on the heavy-duty shaft 7. Nine springs 22 provide for a required compression
force of friction surfaces of driving and driven clutch parts. An elastic element is installed
between a bushing 8, linked with a shaft to drive PTO 4, and a back plate 12.
The center plate 2 has leverage mechanisms 11, providing for positioning the plate
2 on the equal distance from the friction surfaces of the flywheel 1 and the pressure plate 3
as the clutch is engaged. The release levers 10 rest on the forks 13 fixed on the back plate
by means of adjusting nuts 15, locked by the washers 14.
The coupling is engaged and disengaged by a shifter 17 with a throw-out bearing 16,
moving on the bracket 18. A fork 19 of the shifter with a shaft 20 are linked with a clutch
pedal through a hydrostatic drive.
The throw-out bearing 16 is lubricated through a compression grease cup, screwed
into the shifter pin. The grease cup is located on the clutch body left side. To have access
to it, screw out the plug.
1 – flywheel; 2 – center plate; 3 – pressure plate; 4 – shaft to drive PTO; 5 – hub; 6 – bear-
ing; 7 – heavy-duty shaft, 8 – bushing; 9 – torque vibration damper; 10 – release lever; 11 – lever-
age mechanism; 12 – back plate; 13 – fork; 14 – washer; 15 – adjusting nut; 16 – throw-out bear-
ing; 17 – shifter; 18 – shifter bracket; 19 – throw-out fork; 20 – control shaft; 21 – cage; 22 – pres-
sure spring; 23 – insulating washer; 24 – driven disk.
Figure 3.2.1 – Coupling clutch
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