Trailer Construction; Chassis With Mechanical Suspension - PRONAR T286 Operator's Manual

SECTION 3 Pronar T286
** - height from load box base to hook axis
*** - load capacity combined with load box weight,
**** - without hydraulic braking system.
Dimensions of the hook trailer, i.e. width, height and axle track, may differ depending on the
tyres used (option).

3.2 TRAILER CONSTRUCTION

3.2.1 CHASSIS WITH MECHANICAL SUSPENSION

The main load bearing element of the hook trailer is the lower frame (1) – figure (3.1), which
is a welded structure made of steel closed profiles. At the front of the frame, there is drawbar
(2) to which hitching eye (3) is attached. Depending on the version, the trailer may be
equipped with one of the hitching eyes (17-19). The support with two-stage mechanical gear
(3) or straight hydraulic support (optional) (15) or hydraulic folding support (16) can be
installed on the left side of the drawbar.
The parking brake mechanism (5) is located on the left longitudinal member, at the front of
the trailer (5). Rollers guiding the brake cable and the brake lever are mounted to the lower
part of the frame. Side shields (7) can be mounted on both sides of the trailer. Toolbox (20)
can be mounted on the left side of the trailer Mudguards (11) are mounted to brackets on
lower frame.
The trailer's axle system consists of tandem mechanical suspension with steel suspension
springs (8), front fixed axle (9) and steering axle (10) with hydraulic turning interlock. The
trailer's axles are equipped with drum brakes. The actuators which activate the brakes are
pneumatic or hydraulic cylinders, depending on the brake system mounted.
Hydraulically extended rear fender (rear under-run protection device) (14) is installed at the
rear of the trailer's frame. Complete lights support beams (12) are installed on both sides.
Lamp assemblies and reflective warning triangles, included in the complete lighting system,
are protected against damage by guard shields. While driving on public roads these guard
shields must be removed and secured on the other side of the light beams profiles using star
nuts (13).
3.3