Chassis - PRONAR T400 Operator's Manual

CHAPTER 3 Pronar T400

3.2 CHASSIS

The chassis of the trailer is shown in figure (3.1). The lower frame (1) is made as a welded
structure of steel sections. The main supporting element are two longitudinal longerons made
of closed profiles. Longerons are connected to each other by C-shape profiles acting as
crossbars, on which the load box is mounted - figure (3.2). Brackets fixing trailer suspension
are welded to both longitudinal longerons.
In the chassis, axle load balancing is achieved by the swingarms located between the
absorber springs (5). They are hung on brackets with maintenance-free metal-rubber
sleeves. Each axle is equipped with an adjustment screw (turnbuckle) on one side, and a
rigid tie on the other. This makes it possible to adjust the axle between themselves and
relative to the longitudinal axis of the vehicle (tracing adjustment). On a new trailer, the
suspension is factory-set. Axle (3) is a trailing steering axle, while axle (2) is a rigid axle.
Trailer axles are made of square profile capped with pins, on which road wheel hubs are
mounted. The trailer is equipped with four single wheels (4) equipped with drum brakes
activated by mechanical cam shaft. Each pair of wheels is protected by a metal mudguard (7)
mounted on brackets bolted to the trailer frame.
In the rear part of the trailer there is a bumper attached to the chassis with bolts (8). Above
the bumper there is a crossbar to which the rear coupling for connecting the second trailer is
attached with screws, an additional rear coupling is included in the optional equipment. On
both sides of the longerons in the front and rear of the trailer, rear lighting panels (9) and front
supports (13) are mounted, on which the trailer's front position lights are located. Rear group
lamps and end-outline lamps are mounted on the rear lighting panels.
In the front part of the chassis, there is a drawbar with shock absorber (6), next to the
drawbar on the right side of the trailer there is a support screwed to the construction (11).
In standard equipment of the Pronar T400 trailer, there are also two support chocks (10)
mounted on the left longeron. On the opposite side of the trailer there is a tool box (12).
In the optional equipment of the trailer, it is possible to mount the power transmission
mechanism of the dosing drums located in the load box. Details of both installations are given
in chapter (3.9) DOSING DRUMS WITH POWER TRANSMISSION SYSTEM.
3.3