
172
4.8 Fifth-Wheel Coupling
The tractors have a fifth-wheel coupling that is dedicated for: flexible coupling of the tractor
with the semi-trailer having king pin of 50 mm diameter; transfer of drawbar power from the trac-
tor to the semi-trailer; manual-automatic hitch and separation of the tractor and the semi-trailer.
Fifth-wheel coupling consists of a fifth-wheel 8 (see figure 141), brackets 7 and detachable
coupling mechanism. Rubber absorbers in the connection place of the fifth-wheel and the brackets
provide fifth-wheel sweeping in the longitudinal and transversal planes and reduce dynamic stress.
4.8.1 Towing coupling is located under the fifth-wheel and is shown in view A (brackets 7
are not shown for clarity). When drawing control joystick by the unlocking device 1 through the
lever 3, locking valve 10 releases gate hook 9 and it turns by spring force 5 to the position for
coupling. Lowering the control joystick by spring force 4 the locking valve 10 holds the gate hook
9.
When coupling the semi-trailer king pin turns the gate hook 9. The valve 10 and the joystick
1 move to the closed position by spring force 4. Accidental uncoupling interlock 2 fixes the joy-
stick 1 in this position.
1-Uncoupling control joystick; 2-accidental
uncoupling interlock; 3-lever; 4-spring; 5-
spring; 6-line; 7-bracket; 8-fifth-wheel; 9-gate
hook; 10-locking valve
Figure 141 - Fifth-Wheel Coupling
Содержание 4320M
Страница 1: ...URAL 4320М TRUCK and its Modifications ...
Страница 34: ...33 Figure 17 Truck Ural 43206 0551 71 Figure 18 Truck Ural 43206 3111 79 Figure 19 Truck Ural 43206 3511 79 ...
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Страница 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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