11
4.1.
Before using the Hybro weeder
Prior to operation check the technical condition of the machine, first of all that
of the hydraulic system and screw connections. If there is any play in the screw
connections, the screws shall be tightened. Worn or damaged hydraulic hoses shall be
replaced immediately. Check if the spring tines of the HYBRO weeder are securely
fastened. If necessary, lubricate the lubricating points (arm hinges).
After checking its technical condition, the HYBRO weeder may be attached to the
tractor.
Tyre pressure in the tractor wheels must comply with the values recommended by the
manufacturer. The lower bars of the three-point linkage should be at the same height,
spaced correspondingly to the spacing of the lower points of suspension.
CAUTION! Do not exceed the permissible axle load and tyre carrying ability.
The front axle load cannot be lower than 20%.
Fig. 3 Diagram of the markings of tractor loads.
Axle load calculations
Marking:
G
C
– tractor weight,
T
P
– front axle load if the tractor is empty,
T
T
– rear axle load if the tractor is empty,
G
P
– total weight of the rear-mounted machine,
G
T
– total weight of the front-mounted machine,
a – distance between the centre of gravity of the front-mounted equipment and the axle
centre,
b – tractor wheelbase,
c – distance between the rear axle centre and the centre point of the hitch bolt of the
rear-mounted equipment,
d – distance between the machine’s centre of gravity and the centre point of the hitch
bolt (Hybro standard: 1.2 m, Hybro with the roller: 2 m),
x – distance of the centre of gravity from the rear axle (assume 0.45 if the manufacturer
does not provide this parameter).
