PRONAR PWP900, Operator'S Manual, Page: 36 / 74

PRONAR PWP900 SECTION 3
3.4
(1) bearing frame, (2) releasing cable, (3) linkage system, (4) shock absorbers, (5) support,
(6), vertical protection arm (7) hydraulic tipping cylinder, (8) rotor transmission, (9) wheel,
(10) main transmission, (11) rotor working arm, (12) spring tines, (13) horizontal protection
arm, (14) bearing frame tipping modules, (15) mechanical lock, (16) tipping cylinders
hydraulic locking valve.
The rotary tedder design is shown in FIGURE 3.1. The main subassembly of the machine is
the bearing frame (1) connected through the machine's hitching system (3) to the tractor's
three point linkage of category I or II. The bearing frame is protected against mechanical
shocks by two shock absorbers (4) placed between the frame and the hitching system. In the
central part of the bearing frame there is the main transmission (10) of the working
assemblies, which drives the transmissions of the rotors through the drive shafts placed in
the frame.
The main transmission (10) is driven by the tractor's PTO shaft. The rotary tedder is equipped
with eight backward acting rotors seated on running wheels (9). The six rotors are mounted
on the bearing frame tipping modules (14) that enable optimal ground surface tracking. They
are raised and lowered using the hydraulic tipping cylinders (7) and locked in transport
position using the mechanical lock (15). The mechanical lock is released by pulling the
release cable (2). Hydraulic cylinders are operated with the aid of the tractor's hydraulic
system. Each of the rotors has six working arms (11). Each of the arms is equipped with one
pair of spring tines (12) for tedding the swath. They are mounted on the arm with the aid of
securing elements, which prevent fingers from sliding or rotating.
3.3 HITCHING SYSTEM
The rotary tedder is mounted on the tractor using the hitching system integrated with the
machine's bearing frame. FIGURE 3.2 shows detailed mounting structure.
The rotary tedder is adapted to agricultural tractors equipped with three point linkage
category I or II. Pins (1) and (2) – external - serve to attach the machine to a tractor equipped
with category II three point linkage, similarly pins (3) and (4) – internal - for linkage to tractor
equipped with category I three point linkage. The upper pin is common, designed for securing
the upper suspension point irrespective of three point linkage category. The upper pin may
be placed in one of the three available sockets.(A), (B) or (C).
The upper mounting frame is secured to the hitching assembly by the aid of a ball and socket
joint (10). In the lower part of the frame mounting there is a sleeve (11), which moves in a