Volvo Trucks VHD, Руководство по обслуживанию

Страница: 13 / 52

Group 92 Design and Function
Design and Function
Fifth Wheel
See also “Fifth Wheel” page 3.
The Volvo fifth wheel can be identified by the Volvo name
which is cast into the top plate. The top plate has a large
grease pattern reservoir and can be lubricated with the
trailer hooked up.
W9000516
The fifth wheel locking mechanism has only 12 parts, 5
of which are moving. The jaw can be adjusted in a few
minutes using a pair of pliers. The jaw is mounted with
an eccentric jaw pin and can be adjusted 3 times. This
process can be accomplished by a 7-step process of
lifting the jaw pin and rotating it to a new position to create
a tighter fit.
W9000207
There are several operational features of the fifth wheel.
It has a built in safety latch (1- Fig. 2: Volvo Fifth Wheel
page 9) that must be rotated toward the rear of the fifth
wheel before the operating rod (2- Fig. 2: Volvo Fifth
Wheel page 9), used to unlock the fifth wheel, is pulled.
This safety latch allows the driver to confirm that the fifth
wheel is locked or unlocked. The operating rod used to
unlock the fifth wheel is also designed to require less
effort to pull.
W9000243
Fig. 2: Volvo Fifth Wheel
1 Safety latch
2 Operating rod
9