TWD1231VE General information About the workshop manual Certified engines This workshop manual contains descriptions and repair instructions for the standard versions of the TWD740VE and TWD1231VE engines. When service or repairs are done to an emission certified engine, which is used in an area where ex- haust emissions are regulated by law, it is impor- tant to be aware of the following: The engine designation and number are always given on the type plate (please refer to page 9). The engine designation and number must always be given in all correspondence about an engine. Certification means that an engine type has been checked and approved by the relevant authority.
The engine manufacturer guarantees that all engines made of the same type are equivalent to the certified engine. The workshop manual has been primarily prepared for Volvo Penta service workshops and their qualified per- sonnel. This assumes that people who use the manual have basic skills and can do the tasks of a mechanical or electrical nature associated with the trade. This put special demands on service and repair work, as follows: Maintenance and service intervals recommended by Volvo Penta must be complied with. Volvo Penta constantly improves its products, so we reserve the right to make modifications without prior notification.
All information in this manual is based on product data which was available up to the date on which the manual was printed. Any material changes introduced into the product or service methods after this date are notified by means of Service Bulletins. Only Volvo Penta original spares may be used. Service to injection pumps, pump settings and in- jectors must always be done by an authorised Vol- vo Penta workshop. The engine must not be converted or modified, ex- cept for the accessories and service kits which Vol- vo Penta has approved for the engine. Spare parts Spare parts for electrical and fuel systems are subject to various national safety requirements.
Volvo Penta Original Spares comply with these requirements. No damage whatever, occasioned by use of non-original Volvo Penta spares for the product, will be compensa- ted by the warranty offered by Volvo Penta. Installation changes to the exhaust pipe and engine air inlet ducts must not be done. No seals may be broken by unauthorised person- nel. The general advice in the instruction book about opera- tion, care and maintenance apply. IMPORTANT! Delayed or inferior care/mainte- nance, and the use of non-original spares, mean that AB Volvo Penta can no longer be responsi- ble for guaranteeing that the engine complies with the certified version.
Damage, injury and/or costs which arise from this will not be compensated by Volvo Penta. The positions in the illustration of the EDC system are the same as the positions on the wiring diagram, and show where each component is located on the engine. 48 5