ISO 500-1-2014 pdf free.Agricultural tractors一Rear-mounted power take-off types 1, 2,3 and 4一 Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone.
This part of ISO 500 gives general specifications, including speeds, safety requirements, the dimensions for master shield, and clearance zones for rear-mounted power take-offs (PTOs) of types 1, 2, 3, and 4 on agricultural tractors with a track setting of more than 1150 mm (those with track setting width of 1150 mm or less are covered in ISO 500-2).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5673-2, Agricultural tractors and machinery — Power take-off drive shafts and power-input connection — Part 2: Specification for use of PTO drive shafts, and position and clearance of PTO drive line and PlC for various attachments
ISO 6489 (all parts), Agricultural vehicles — Mechanical connections between towed and towing vehicles
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 power take-off
PTO
external shaft on the rear of the tractor to provide rotational power to implements
4 Specifications
The tractor rear power take-off (PTO) is classified into four types (see TabkJ).
4.2 The direction of PTO rotation shall be clockwise when viewed from behind the tractor except
when a ground-driven PTO is operated with the tractor in reverse direction.
4.3 The nominal PTO rated rotational frequency can be realized by one or more engine speed ranges.
5 PTO-speed requirements for shiftable PTO
5.1 Should more than one ratio between the engine speed and the PTO rotation speed be provided, any change of ratio shall be indicated. In addition, specific design measures shall be taken to ensure that unintentional changes of ratio, particularly in changing to a higher rotational speed, cannot occur. This safety device shall operate each time the PTO is engaged.
5.2 A means to indicate when the PTO is operating at which nominal speed shall be provided.
6 Safety requirements
6.1 The PTO master shield, as shown in Figure 1 and Table 2. shall be supplied by the tractor manufacturer and shall be fixed to the tractor. If the same degree of safety protection is reached and the clearance zone is respected, equivalent protection devices (e.g. towing hook or clevis supports) can be used instead of the master shield. In this case, provisions shall be made for anchoring the restraining member of the PTO drive shaft guard.
6.2 If necessary, the PTO master shield or a part of the shield can be movable without detachment from the tractor to facilitate attachment of the PTO drive shaft. The movable portion of the master shield shall be resistant to unintentional movement when in the operating position. The master shield can be made of flexible material.
6.3 If the PTO master shield can be used as a step, it shall withstand a vertical static load of 1 200 N without permanent deformation.
6.4 An additional non-rotating casing which fully covers the PTO can also be supplied with the tractor to cover the PTO when the PTO is not in use.
7 Dimensions for tractor master shield aperture and clearance zone of PTO
The dimensions of the tractor master shield aperture and the clearance zone around the PTO shall be in accordance with Figure 1 and Table 2.ISO 500-1 pdf download.
Tags: Agricultural tractors
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