ISO 17567 pdf download – Agricultural and forestry tractors and implements – Hydraulic power beyond

ISO 17567 pdf download – Agricultural and forestry tractors and implements – Hydraulic power beyond.
3.6
hydraulic power beyond kit
kit provided by agricultural and forestry tractor manufacturers that indudes all brackets, tittings, seals, lines, quick couplings, dust protection, instructions for installation [including flow class reference, load signal (pressure) drop values, and return pressureJ on the tractor, and instructions for connection of implements to the hydraulic power beyond ports
4 Systems and interfaces (see Figures 1 to 4)
4.1 Open-centre hydraulic system
On agricultural and forestry tractor systems with open-centre hydraulic valves as defined Wi ISO 5598, pressure, return and drain ports are required. The schematic of Figure 1 shows two basic means for providing hydraulic power beyond interfaces (power beyond priority or tractor valve priority) for a typical hydraulic motor connected to a tractor wilt, an open-centre hydraulic system.
4.2 Constant-pressure closed-centre hydraulic system
On agricultural and forestry tractor systems with closed-centre hydraulc valves as defined in ISO 5598, pressure. return and drain ports are requred. The schematic of Figure 2 shows one basic means for providing a hydraulic power beyond interface for a typical hydraulic motor connected to a tractor with a constant- pressure closed-centre hydraulic system.
4.3 Load-sensing closed-centre hydraulic system
On agricultural and forestry tractor systems with load-sensing hydraulic valves, pressure, return, load signal (pressure) and drain ports are required. The schematic of Figure 3 shows one basic means for providing a hydraulic power beyond interface for a typical hydraulic motor connected to a tractor with a load-senstng hydraulic system.
The signal from the implement connected to the load signal (pressure) port must be resolved with the load signal from the tractor’s valves before being sent to the pump. This resolution valving or circuitry shall be provided by the tractor manufacturer, The Implement manufacturer shall ensure that the Implement’s load signal is vented when all external functions are in their hold position.
4.4 Load-sensIng closed-centre hydraulic system with fixed displacement pump
The schematic of Figure 4 shows one basic means for providing a hydraulic power beyond interface for a typical hydraulic motor connected to a tractor with a load-sensing closed-centre hydraulic system.
The signal from the implement connected to the load signal (pressure) port must be resolved with the load signal from the tractor’s valves before being sent to the pump. This resolution valving or circuitry shall be provided by the tractor manufacturer. The implement manufacturer shall ensure that the Implement’s load signal Is vented when all external functions are in their hold position.
The quick-action xessure coupling shall have a self-sealing capability but shall not have connecf-wtWeer ,gine-is-wnnirsg capability. The quick-action return, load signal (pressure) and drain couplings may have ccnrvecf-under-pmssure capability, but shall have the flow path open after connection. All quick-action couplers should have a breakaway functionality as defined in ISO 5598.
The maximum pressure drop from the supply port of the tractor to the load signal of the work port of the rplement control valve shall be considered when designing power beyond circuits. The tractor manufacturer should state the load signal (pressure) pressure drop available at rated flow between the power beyond pressure and load signal (pressure) quick-action couplings.
The tractor manufacturer shall provide information as pan of the hydraulic power beyond kit for connection of hydraulic power beyond circilts; while the implement manufacturer shall provide instructions for connection of the riplement to the tractor system types for which It Is designed.
6.2 Port and quick-action coupling identification
The ports on the tractor and the quick-action couplings that are installed as part of the hydraulic power beyond kit should be identified using the following alphabebcal symbols.