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This document is an operating manual for the RABE Sturmvogel L seedbed combination, an agricultural implement designed for preparing seedbeds.
The RABE Sturmvogel L is a seedbed combination implement, primarily used for standard agricultural soil preparation. It features a hydraulic folding frame with a twin-action mechanism, allowing it to be folded for transport and unfolded for operation. The implement incorporates spring-mounted tined leveling bars, roller-bearing spike tooth rotary harrows, and harrow leafs with either 5-row extra-heavy tilth harrow tines or 4-row vibra-tines (including steep-angled vibra-tines).
The leveling board, which is spring-mounted and tined, is designed to level and break up rough clods of earth. Its working depth is independent of the harrow's depth, and its height can be adjusted individually. The implement also includes track looseners, available in rigid or spring-mounted versions, which can be adapted to the required track width. The depth control for the looseners is pin-adjustable.
For operation, the implement is coupled to a tractor via a three-point linkage (Cat. II for 4.5m models, Cat. III for 6m and 9m models). Hydraulic hoses provide the necessary power for folding and unfolding, with functions for "Lift" (fold in) and "Depress/Lower - Fold out." The implement's frame can be adjusted to a horizontal position by altering the top link's length. The top link's incline influences roller pressure: a steep incline results in less roller pressure, while a level incline leads to more.
The Sturmvogel L is available in several models, distinguished by their working width, weight, and tractor power requirements:
The rotary harrows have front rollers of 330 mm diameter and rear rollers of 270 mm diameter. Middle crumblers are connected on 6m and 9m implements.
Safety: The manual emphasizes strict adherence to safety precautions. Operators must be qualified and trained. It warns against standing between the tractor and implement during coupling/uncoupling, or within the implement's turning circle/operating area. The tractor's control hydraulics should be set to "position control" during coupling/uncoupling. An adequate counterweight on the tractor's front is necessary for safe steering. Dangers of crushing and cutting injuries in the three-point linkage and collapsible side sections are highlighted. After-running roller segments require caution; do not approach until they stop. The tractor's hydraulic control system should be disabled during towing to prevent accidental operation. Before leaving the tractor unattended, the implement must be lowered, the engine switched off, and the ignition key removed.
Set-up: Involves checking coupling compatibility, setting lower links to the same height, coupling the lower link shaft, adjusting the upper control arm, securing the coupling assembly, and properly connecting hydraulic hoses. Support legs must be raised.
Transportation: The implement must be lifted slightly to fold in or out. For 4.5m implements, folding in with low-set harrow leafs requires outer sections to be adjusted to a "flatter" position. For 9m implements, locking hooks (5/1) must be turned down to engage automatically before folding. Track looseners should be inserted at a low implement width. Lighting gear and warning labels (additional equipment) must be mounted. The lower link of the tractor should be fastened to the side, and control units secured. The maximum permitted transportation width is 3 meters; special permits are needed for oversized loads. Overhanging items must be covered and fitted with warning signs (DIN 11030). Lighting is required if the implement blocks tractor lights or exceeds width/overhang limits.
Operation: Avoid sharp curves and always raise the implement before reversing. Lower links should be positioned to one side, limiting lateral movement on steep slopes. The implement frame must be horizontal. The combination should be set to "float," with top link incline affecting roller pressure. Working depth of the harrow is pre-selected using connectors in perforated jibs (6/1). Levelling board height adjustments (7/1) prevent earth walls from shunting. Track looseners' depth control is pin-adjustable (7/3), and their shares are reversible. Overload backup for rigid looseners uses a splint pin.
Dismantling/Parking: The implement can be parked folded out or in (secured for transport) on rollers or supporting legs (9/1). The rear support leg is also used for 9m implements (8/1). Ensure the implement is on solid ground and keep the hydraulic coupler free of dust.
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