PRONAR VMP-10, Руководство пользователя, Страница: 31 / 78

3.7
Main brake is activated from operator’s working place by pedalling tractor brake pedal. Task
of control valve (2) used in pneumatic systems – figure (3.3A) and (3.4A) is actuating brakes
of the feed car along with actuating tractor brake. Furthermore, in case of incidental
disconnection of a pipe located between car and tractor, control valve automatically actuates
brake of the machine. Applied valve was equipped in brake releasing system that is used
when the feed car is disconnected from tractor. After having air pipe connected to tractor,
releasing device spontaneously switches into position enabling normal operation of brakes.
FIGURE 3.6A THREE-POSITION BRAKING FORCE REGULATOR
(1) three-position braking force regulator, (2) steering lever, (A), (B), (C) working positions of
controller
Three-position braking force controller – figure (3.6A), used in pneumatic systems adjusts
braking force depending on its setting. Switching on appropriate working mode is made
manually by machine operator before start-up with use of lever (2). There are three working
modes available: A – “No load”, B – “Half load”, C – “Full load”.
3.5 PARKING BRAKE
Parking brake was designed for immobilizing the feed car while being in halt state. Structure
of parking brake system was shown on figure (3.7A). Crank mechanism (1) of brake is
welded to left longitudinal member of a bottom frame. Steel brake cable (2) is attached to
levers of expander of carriageable axle with crank mechanism by means of hand brake
pulling off mechanism (3). Stretching cord causes swinging expander levers, that by half-
opening brake shoes, immobilize the feed car.
2
C
B
A
1