Operator's Manual
Round bale wrapper
Spin S, Spin F
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8.2.
Hydraulic system
The wrapping machine’s hydraulic system is powered from the tractor’s hydraulic system. To
attach the machine to the tractor’s hydraulic system, the attachment cables are connected to the
hydraulic controls and further to the wrapping machine’s hydraulic motor.
Through the chain transmission, the hydraulic motor rotates the drums with the loaded silage
bales. By means of the three-section hydraulic control unit (1), the hydraulic engine powers 5
double-acting cylinders responsible for:
tilting the rotary table and the unloading unit to the vertical and horizontal position,
raising and lowering of the loading arm,
rotation of the rotary table.
The control over the engine and hydraulic cylinders is ensured using the control levers located
in the tractor’s cabin during operation. These levers are connected to the three-section control unit
using Bowden cables.
The symbols on the support inform about the functions fulfilled by each lever on the control
unit (1). The three section control unit (1) is protected against high pressure from the hydraulic
system by means of a safety valve (1) (SPIN S), four section control unit (SPIN F). The 3-
sectional control unit (1) (SPIN S) or 4-sectional (SPIN F) is protected against high pressure from
the hydraulic system by means of a safety valve. The valve indicated on the illustration Fig. 23 item
(2) is located in the rotating frame section and operates only in the table rotation system rotating
clockwise, which is opposite to the wrapping direction. Its task is to smoothly stop the rotating
frame.
a)
b)
Fig. 23. Hydraulic system – a) SPIN S; b) SPIN F
