PRONAR T679, Руководство оператора

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SECTION 3 Pronar T679
3.3
3.2 TRAILER CONSTRUCTION
3.2.1 CHASSIS
The trailer chassis consists of the subassemblies indicated in figure (3.1). Lower frame (1) is
a structure welded from steel sections. The main support elements of the frame are two
longitudinal members connected with crossbars. In the middle section there are sockets (5)
used for mounting the tipping hydraulic cylinder. Load box support (6) is mounted in front of
the sockets of the tipping cylinder. At the rear of the frame there lugs serving as pivot points
during the tipping of the load box to the rear. Below there is a rear hitch connector and
hydraulic and pneumatic system connectors to connect the second trailer. Under the hitch
socket there is an under-run protective device (15). On both sides at the rear of the frame
lights support beams (7) are bolted and plastic wheel mudguards (16).
Trailer suspension consists of two wheel axles (8), in a tandem arrangement, suspended on
taper leaf springs (9) connected by rocker arm (10). Axles are secured to suspension springs
using absorber plates and U bolts. Axles are made from bar terminated with a pins, where
wheel hubs are mounted on cone bearings. The wheels are single and equipped with shoe
brakes activated by mechanical cam expanders.
In the front part of the chassis, parking stand (3) is mounted. Depending on the order placed,
trailer can be equipped with one of the following supports:
•
hydraulic straight support
•
hydraulic shear type support,
•
mechanical support,
•
telescopic support.
Parking brake crank mechanism (14) is located on the left side of the lower frame. Drawbar
(2) is bolted to the faceplate. Location of the drawbar can be adjusted depending on the
tractor hitch (upper or lower) used to hitch the trailer. Rotating drawbar eye (11) with the eye
of
∅
50 mm or ball drawbar eye K80 (13) is attached to the drawbar faceplate in the lower
position. Fixed drawbar eye (12) with the eye diameter of
∅
40 mm is mounted to the trailer
with the drawbar in the upper position.