Boom Suspension System

The spray booms of the 800-series trailed sprayers are fitted with a central pendulum and anti-yaw boom suspension system. This boom leveling system allows for working on uneven ground (vertical movements) and prevents yawing of the spray boom (horizontal movements).

The central pendulum boom suspension (A) with shock absorbers (C) ensures that the machine can rotate around its longitudinal axis without any effect on the spray boom. The spray boom will therefore remain horizontal, if properly adjusted.

Yawing of the spray boom is avoided due to the complete suspension frame being held in two ball bearings (D). This allows the machine to move around its vertical axis in relation to the spray boom, without causing the spray boom to yaw. Polyurethane dampers (E) work as shock absorbers for the anti-yaw system supported by the chock absorbers (F).

A-Bearing pendulum system
B-Swivel
C-Shock absorbers horizontal movements
D-Anti-yaw system
E-Polyurethane dampers (anti-yaw system)
F-Shock absorbers vertical movements

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• There should be no contact pressure between the guiding strip (B) and the guiding pin (A) of the pendulum arm for the swinging system to function effectively. Take note of the following points in order to achieve this:
• The spray boom must be aligned straight, see "Spray boom alignment" in the section entitled "Adjustments".
• The machine must be coupled to the tractor in such a manner that the machine does not lean forwards or backwards.

During spraying, spray boom movement can be minimized by heeding the following advice:

• Drive at a regular speed
• Limit your steering movements
• When needing to turn, do so smoothly.
• For optional steering drawbar, use the HMS function (if equipped).

A-Guiding pin (pendulum arm)
B-Guiding strip

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For working on slopes (more than 5%) a boom suspension kit is delivered with the sprayer and recommended to be used. This kit contains two springs (A), which are fitted to the suspension system in addition to the shock absorbers. The springs ensure that the spray boom will follow the slope better, without having to operate the boom tilt correction too much. The boom suspension will be slightly less sensitive, but pendulum action still remains possible. The springs can be fitted or removed according to the field conditions.

The springs are designed for working on hilly fields and therefore should be removed for working on flat fields.

A-Boom Suspension Kit For Slopes

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