Parking Brake - PRONAR T400 Operator's Manual

CHAPTER 3
on the trailer side are connected. The shaft (6) is equipped with an automatic clutch that
protects the power transmission mechanism to the dosing drums. The clutch interrupts power
transmission when the torque exceeds the clutch calibration value. After decreasing the shaft
speed or stopping power take-off, the clutch automatically re-engages.
Torque is transmitted from the tractor through PTO shafts (6), (7), (8) and (9) to the gearbox
(3). From the gearbox via the drum drive shaft (10), the drive is transmitted to the lower drum
chain transmission and from there another chain transmission to the upper dosing drum. Both
chain transmissions are equipped with tensioners.
Figure (3.11) presents dosing drums facilitating precise unloading of cargo from the trailer's
load box. The drums were placed in the rear part of the loading box and mounted on rolling
bearings. The drums are driven by means of a power transmission mechanism. Two types of
dosing drums are available, drums dedicated to the green fodder (1) and corn chaff drums
(2).
TIP
PTO shaft revolutions speed is equal to 540 rpm. It is not allowed to use other PTO shaft
revolutions during service of dosing drums.

3.10 PARKING BRAKE

The parking brake is used to immobilize the trailer during parking. The brake crank
mechanism (1) is attached to the left longeron of the lower frame. A steel string (4) connects
the expander levers (2) of the front axle with the crank mechanism. Tensioning the cable
causes movement of the expander levers, which in turn spreads the brake shoes
immobilizing the trailer during parking.
3.17
Pronar T400