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Section 3
Design of the trailer is shown in figures
(3.1) and (3.2).
The trailer frame (1) is a structure welded
from steel sections.
Wheels and suspension system (6) is
connected with the frame using bolts. The
system consists of three axles in tridem
system with parabolic leaf springs con-
nected with rocker arms. Axles are made
from square bars terminated with pins, on
which wheel hubs are mounted on cone
bearings. Brake drums with shoe brakes
are activated by mechanical cam ex-
panders, which are operated by cylinders
bolted to axle brackets.
In the rear of the trailer there are ramps
5
3
Figure 3.2
Trailer construction
(1) drawbar
(4) parking stand
3.4
PRONAR RC3100
(2) equipped with springs (5). The springs
assist in lowering and raising the ramps.
In the transport position the ramps are se-
cured using locking pins (4) and transport
straps (10). Lighting elements and re-
flective lights are attached to the bottom
side of the ramps.
The load platform floor is made of conif-
erous wood or oak wood profiled planks
(3). Load placed on the platform is se-
cured with belts, ropes or chains, which
are attached to fixing lugs located along
the whole platform, on both sides of the
trailer. The fixing lugs are marked with in-
formation decals (4) – table (2.1). On the
front side, the load platform is limited by
4
1
(2) spring
(5) bracket for conduit connectors
Design and operation
2
621-G.02-1
(3) drawbar eye
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