GOST 25907-89 PDF

Full title and description

GOST 25907-89 — "Устройства буксирные автомобилей. Общие технические требования. Методы испытаний" (English title: "Towing attachments for commercial vehicles. General technical requirements and test procedure"). The standard specifies types, principal dimensions, technical requirements and test methods for towing attachments (towing forks, sockets with pins, rigid towing bars/triangles) used on commercial vehicles.

Abstract

GOST 25907-89 defines design categories, dimensional ranges, material and hardness requirements, strength and fastening rules, and standardized test procedures for towing attachments intended for commercial vehicles up to a specified maximum design gross mass. It also lists normative references and test methods to verify mechanical strength and serviceability of towing devices.

General information

• Status: In force / действующий (standard is maintained as current in national collections; earlier time limitation was removed by interstate council protocol).
• Publication date: Published 31 August 1989; date of entry into force 1 January 1990.
• Publisher: Adopted by the State Committee for Standards of the USSR (Gosstandart of the USSR).
• ICS / categories: Automotive coupling / road transport equipment — OKС / ICS class 43.040.70; OKP code 458000.
• Edition / version: Original designation GOST 25907-89 (1989). Text records indicate later updates/registrations of the text (database entries show updates to the descriptive record).
• Number of pages: 10 pages (printed / PDF versions commonly distributed).

Scope

The standard applies to towing devices consisting of a towing fork or socket with a pin (towing forks or sockets) located at the front of vehicles of all types (except passenger cars and combined passenger‑cargo vehicles built on their basis) with design gross mass up to 50 000 kg, and to rigid tow links of the "bar" or "triangle" type used as coupling links to a towing vehicle equipped with a rear towing hook or towing fork. It does not apply to towing devices for vehicles with design gross mass over 50 000 kg, nor to towing devices of other types or to vehicles manufactured before 1 January 1992 where specifically excluded.

Key topics and requirements

• Definitions and classification of towing device types (e.g., "bar–towing fork", "triangle–towing forks").
• Principal dimensions and type‑size selection linked to the design gross mass of the towed vehicle (tables of minimum dimensions and mounting heights).
• Material, manufacture and heat‑treatment requirements; minimum hardness for mating working surfaces (specified hardness thresholds).
• Design requirements for attachment and locking of pins, mounting methods and strength calculation guidance based on operational loads.
• Test methods and procedures to verify strength and serviceability, including static and functional tests described in the standard.
• Normative references to related GOST and inter‑state documents used for coupling devices and hooks.

Typical use and users

Primary users are vehicle and component manufacturers, suppliers of towing equipment, conformity assessment and mechanical testing laboratories, fleet operators and technical regulators responsible for vehicle safety and coupling device certification. The standard is used to design, manufacture and test towing attachments for commercial vehicles within the specified mass range.

Related standards

Normative and related documents referenced by GOST 25907-89 include (but are not limited to) GOST 2349-75 (tow hooks), GOST 7505-75, ГОСТ 25906-83 and earlier versions, and ST СЭВ 5165-85 for towing forks; the standard also replaces/succeeds earlier regional GOST editions in the same subject area.

Keywords

towing attachment; towing fork; towing socket; towing pin; towing bar; towing triangle; commercial vehicles; coupling device; test methods; strength requirements; GOST 25907-89.

FAQ

Q: What is this standard?

A: GOST 25907-89 is a national (former USSR / adopted) standard that sets general technical requirements and test methods for towing attachments used on commercial vehicles (towing forks, sockets with pins and rigid tow links).

Q: What does it cover?

A: It covers types, principal dimensions and sizes, material and hardness requirements, fastening and mounting rules, strength considerations and validated test procedures for verifying towing devices intended for vehicles within the specified design mass limits.

Q: Who typically uses it?

A: Vehicle manufacturers, towing‑device and component suppliers, testing and certification laboratories, fleet operators and regulatory bodies concerned with coupling device safety and compliance.

Q: Is it current or superseded?

A: Database records list GOST 25907-89 as the active/in‑force designation (entered into force 1 January 1990). An earlier limited validity period was later removed by interstate council decision; the standard replaced earlier related GOSTs. Users should verify the most current national status with the relevant standards body before relying on it for compliance.

Q: Is it part of a series?

A: It belongs to the family of GOSTs addressing vehicle coupling devices and towing equipment and is cross‑referenced with related GOSTs (hooks, forks, fastening standards and test procedures). It effectively consolidates and replaces earlier standards in this subject area.

Q: What are the key keywords?

A: Towing attachment, towing fork, towing socket, towing pin, towing bar, triangle link, commercial vehicles, coupling device, test methods, strength, GOST.