Trailer Construction; Chassis - PRONAR T386 Operator's Manual

SECTION 3
- on the section supplying main cylinders – 25 MPa,
- on the sections supplying other cylinders – 18 MPa.

3.2 TRAILER CONSTRUCTION

3.2.1 CHASSIS

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) with hydraulic shock absorption and smooth height adjustment to which hitching eye (3) is
attached. Depending on the version, the trailer may be equipped with one of the hitching
eyes (3,14,15,16). The support with two-stage mechanical gear (4) or straight hydraulic
support (optional) (12) or hydraulic folding support (13) can be installed on the left side of the
drawbar.
The trailer's axle system consists of tridem mechanical suspension (6) with parabolic leaf
springs, fixed axle (7) and two steering axles (8) 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 underrun protection device) (9) is installed at the
rear of the trailer's frame. Complete lights support beams (10) 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 (11).
3.3
Pronar T386