1.2 To the user
4th Generation engines with SCR system (AWI/ATI) meet EU97/68/EC Stage IIIB and EPA 40 CFR 89 Tier
4i emission requirements set by authorities. The manufacturer guarantees that all engines of this type are
equivalent to the engine that is officially approved.
4th Generation engines without SCR system (WI/TI) meet EU97/68/EC Stage 2 and EPA 40 CFR 89 Tier 2
emission requirements set by authorities. The manufacturer guarantees that all engines of this type are
equivalent to the engine that is officially approved.
Please note that the service schedule should be followed carefully, especially when performing periodical
maintenance. Any adjustment and repair work to the injection system or the electronic control unit should
only be carried out by a representative authorised by AGCO Power Inc. When performing any service or
repair work, only use original AGCO Parts spare parts. Inadequate or delayed service and the use of parts
other than original AGCO Parts spare parts will invalidate the responsibility of AGCO Power Inc. with
respect to the fulfilment of the emission requirements.
This Workshop Manual is intended to assist with workshop operations and repair work.
4th Generation engines (types 33, 44, 49, 66, 74, 84 and 98) are generally of the same construction, so the
same repair instructions will usually apply to various engine types. The differences between the various
engine types, which affect repair work, are mentioned in the technical data and repair instructions.
All measurements are in millimetres and valid when the temperature of the parts is +20°C, unless
otherwise stated.
NOTE: Engine gaskets, seals and washers are disposable. Always change gaskets, seals and washers
when opening joints.
Before starting any repair work, please read the safety instructions at the beginning of this book. Make
sure that you have all the necessary tools, parts and accessories to hand. The special tools mentioned in
the work instructions speed up and facilitate the work and contribute to successful execution of the work.
An engine which has undergone repairs must be run in just like a new one.
Should the engine require work not described in this manual, please consult your local agent or the Service
Department of AGCO Power Inc., Linnavuori, Finland. To facilitate consulting, find out the following facts
about the engine before contacting us:
• engine type
• engine number
• model or equipment
• operating hours
This Workshop Manual does not cover the regular service procedure as this is explained in the 4th
Generation series Operator's Manual.
As AGCO Power Inc. is continuously developing its products, all rights are reserved to alter the
specifications, accessories and the service and repair procedure without separate notice.
NOTE: AGCO Power Inc. takes no responsibility for any damages caused because of possible incorrect
information in this manual. Distribution of this manual in printed or electronic form is not allowed without
our prior agreement.
1. Introduction
4th Generation Engines 1-5
8370 79492
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