ISO 500-2-2004 PDF

Full title and description

Agricultural tractors — Rear-mounted power take-off types 1, 2 and 3 — Part 2: Narrow-track tractors, dimensions for master shield and clearance zone. This part of ISO 500 specifies the required dimensions of the master shield and the clearance zone for rear-mounted power take-offs (PTO) on narrow-track agricultural tractors (track width 1 150 mm or less).

Abstract

ISO 500-2:2004 defines dimensional requirements for the protective master shield and surrounding clearance zone for rear-mounted PTOs of types 1 and 2 on narrow-track tractors to reduce entanglement and contact hazards. The document is concise (technical specification of dimensions and safety-related clearances) and intended to harmonize design and safety requirements across manufacturers.

General information

• Status: Published (confirmed current following ISO systematic review).
• Publication date: 2004-09 (7 September 2004).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: Agricultural tractors / safety dimensions — ICS 65.060.10; technical committee ISO/TC 23/SC 4.
• Edition / version: Edition 1 (2004).
• Number of pages: 4.

Scope

Specifies the dimensions of the master shield and clearance zones for rear-mounted power take-offs (PTO) of types 1 and 2 on narrow-track agricultural tractors (track width 1 150 mm or less). It applies to design and safety verification of the shielding around the PTO area to reduce the risk of operator and bystander injury from rotating driveline components. The standard is limited to dimensional and clearance requirements rather than test methods or whole-tractor safety systems.

Key topics and requirements

• Defined dimensional envelopes for the master shield and associated clearance zone around rear-mounted PTOs.
• Applicability to PTO types 1 and 2 on narrow-track tractors (track width ≤ 1 150 mm).
• Requirements intended to prevent contact with rotating PTO components and reduce entanglement hazards.
• Coordination with related parts of ISO 500 series that cover general specifications and other tractor track widths.

Typical use and users

Used by tractor and implement manufacturers, component designers (PTO shields and driveline suppliers), safety engineers, conformity assessment and certification bodies, national standards committees, and regulators setting machinery safety requirements. It is referenced when designing or verifying PTO shielding on narrow-track agricultural tractors.

Related standards

Closely related to ISO 500-1 (general specifications, safety requirements and dimensions for wider-track tractors) and ISO 500-3 (other related dimensional requirements within the series). Together the parts replaced the earlier ISO 500:1991 in 2004. Users should consult the other parts of the ISO 500 series for complete safety and dimension guidance.

Keywords

agricultural tractor; power take-off; PTO; master shield; clearance zone; narrow-track; dimensions; tractor safety; ISO 500 series.

FAQ

Q: What is this standard?

A: ISO 500-2:2004 is an international standard specifying the dimensions for the master shield and clearance zone for rear-mounted PTOs (types 1 and 2) on narrow-track agricultural tractors (track width 1 150 mm or less).

Q: What does it cover?

A: It covers dimensional requirements for the master shield and clearance zone to reduce contact and entanglement hazards around rear-mounted PTOs on narrow-track tractors; it does not provide full test methods or broader machine-level safety requirements.

Q: Who typically uses it?

A: Tractor and implement manufacturers, component suppliers (PTO shields), safety and compliance engineers, certification bodies, and regulators involved in agricultural machinery safety.

Q: Is it current or superseded?

A: ISO's record indicates ISO 500-2:2004 was published in September 2004 and was reviewed and confirmed (remains published/current following ISO systematic review activity). Users should check national adoption notices for any regulatory or national variances.

Q: Is it part of a series?

A: Yes — ISO 500-2 is Part 2 of a multipart series (ISO 500‑1, ISO 500‑2, ISO 500‑3) dealing with rear-mounted PTOs and related dimensional/safety requirements for agricultural tractors. The 2004 set replaced earlier consolidated ISO 500 material.

Q: What are the key keywords?

A: Agricultural tractors, PTO, power take-off, master shield, clearance zone, narrow-track, dimensions, safety.