Diesel engines - Base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems - Mounting dimensions

This document specifies dimensional requirements for base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems for diesel (compression-ignition) engines.

Moteurs diesels — Pompes d'injection en ligne à fixation par base plane et pompes d'alimentation à haute pression pour systèmes d'injection de carburant à rampe commune — Dimensions de montage

General Information

Status
Published
Publication Date
14-Oct-2018
Current Stage
9092 - International Standard to be revised
Start Date
27-Oct-2025
Completion Date
13-Dec-2025

Relations

Effective Date
06-Jun-2022
Effective Date
12-May-2018

Overview

ISO 7612:2018 specifies mounting dimensions for base-mounted in-line fuel injection pumps and high‑pressure supply pumps used with common‑rail fuel injection systems for diesel (compression‑ignition) engines. This fifth edition (2018) updates the previous 2009 edition and provides standardized figures and tables that define dimensions and tolerances (in millimetres) for several pump types to support mechanical interchangeability and consistent engine integration.

Key topics and requirements

  • Scope: Dimensional requirements for base‑mounted in‑line pumps and two‑cylinder high‑pressure supply pumps for common‑rail systems.
  • Figures and tables: Detailed Figures 1–7 and Tables 1–4 present mounting layouts, hole patterns and nominal dimensions for different pump types and cylinder counts.
  • Dimensions and tolerances: All specified dimensions are in millimetres; tolerances are provided where applicable. Dimensions not specified in the standard are left to the manufacturer’s choice.
  • Shaft taper reference: The standard refers to ISO 6519 for tapers of shaft ends and hubs-ensuring consistent shaft interface specifications.
  • Edition notes: The 2018 edition cancels ISO 7612:2009, removes a type no longer in serial production, and corrects a previously reported dimensional error.

Applications and practical value

ISO 7612 is primarily used to:

  • Enable OEMs and engine designers to adopt standardized pump mounting interfaces, reducing design iteration and assembly issues.
  • Allow fuel pump manufacturers to produce units that fit a range of engines and mounts, improving interchangeability and aftermarket compatibility.
  • Support service and repair operations by ensuring replacement pumps match existing mount dimensions.
  • Aid CAD modelling, fixture design, and production tooling by providing precise mounting layouts and hole patterns.
  • Streamline supply chain and regulatory processes where dimensional conformity is required for fitment and safety.

Typical users include automotive and heavy‑duty engine manufacturers, fuel pump suppliers, powertrain engineers, aftermarket vendors, testing laboratories and maintenance workshops.

Related standards

  • ISO 6519 - Tapers for shaft ends and hubs (normative reference cited by ISO 7612).
  • ISO 7299‑1 / ISO 7299‑2 - End‑mounting flanges for pumps (related mounting standards).
  • ISO 7879 - Cradle‑mounted in‑line fuel injection pumps - mounting dimensions.

Keywords: ISO 7612, mounting dimensions, base‑mounted in‑line fuel injection pump, high‑pressure supply pump, common rail, diesel engines, dimensional requirements, ISO 6519, pump interchangeability, OEM.

Standard

ISO 7612:2018 - Diesel engines — Base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems — Mounting dimensions Released:10/15/2018

English language
9 pages
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Frequently Asked Questions

ISO 7612:2018 is a standard published by the International Organization for Standardization (ISO). Its full title is "Diesel engines - Base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems - Mounting dimensions". This standard covers: This document specifies dimensional requirements for base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems for diesel (compression-ignition) engines.

This document specifies dimensional requirements for base-mounted in-line fuel injection pumps and high-pressure supply pumps for common rail fuel injection systems for diesel (compression-ignition) engines.

ISO 7612:2018 is classified under the following ICS (International Classification for Standards) categories: 43.060.40 - Fuel systems. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 7612:2018 has the following relationships with other standards: It is inter standard links to ISO 6909, ISO 7612:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 7612:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 7612
Fifth edition
2018-10
Diesel engines — Base-mounted in-
line fuel injection pumps and high-
pressure supply pumps for common
rail fuel injection systems — Mounting
dimensions
Moteurs diesels — Pompes d'injection en ligne à fixation par base
plane et pompes d'alimentation à haute pression pour systèmes
d'injection de carburant à rampe commune — Dimensions de montage
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions and tolerances . 1
Bibliography . 9
Foreword
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This fifth e
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