Iveco N60 ENT M37 Technical And Repair Manual

The indications contained in this document pertain to the N60 ENT M37 marine engine and complement the IVECO MOTORS publication “of Marine Diesel Engines Installation Handbook”, the reader should refer to for anything that is not explained herein. Technical engineers and fitters are required to comply with safety regulations on work. They have to implement and adopt the device foreseen for individual personal safeguard while carrying out maintenance or checks.

Iveco N60 ENT M37 Workshop Manual
Sections 1-2-3 are intended for sales personnel, to provide them with exact knowledge of the product’s characteristics and enable them to meet Customer’s demands with precision, as well ad for yard personnel, to help them design and complete a correct installation. Remainders sections are meant for personnel tasked with conducting ordinary and extraordinary maintenance with an attentive consultation of the chapter devoted to diagnosing, they will also be able to provide an effective technical assistance service.

COMMERCIAL CODE
The purpose of the commercial code is to make it easier to understand the characteristics of the product, categorizing the engines according to their family, origins and intended application.The commercial code, therefore, cannot be used for technical purposes to recognize the engine’s components, this purpose is served by the “ENGINE S/N”.

Iveco N60 ENT M37 service Manual
NEF engines are the highest expression of design and engineering efficiency that IVECO MOTORS makes available on the market place. Engines highly innovative designed to be able to comply now with the regulations on fumes and acoustic emissions that will be enforced in the near future. As designed by innovative techniques and manufactured by advanced working processes,they are the result of hundred years of design and engineering tradition as well as of an important international cooperation.

The excellent performance of NEF engines originates from induction and exhaust ducts of new design where, by improving the gas exchange phases, the intaken air turbolence is improved, thus enabling the complete exploitation of the new injection system capacity.

The new criteria chosen in defining the parameters setting the combustion conditions, metering and injection, optimized instant by instant, enable to obtain new balance between high performance and consumption reduction. NEF engines can be rigged by a mechanical pump or by a total electronic controlled “Common Rail” fuel supply system.

Every technical solution has been accurately devised so as to assure qualitative product perfection.The configuration istself of the engine has been designed in such a way so as to facilitate access to each individual part and thus reducing maintenance time. The cylinder head fitted with four valves per cylinder, rear timing control, new design connecting rods and aluminum nickel pistons are components of an engine fitted with 40% less elements of an engine of equivalent performance.

Moreover within the crankcase, made in cast iron, coolant circulation grooves, ducts for lubrication loop for the various machine members and the seating for push rod bushings have been grooved in. The backing plate (6) applied to the lower part, makes the crankcase stiffer and improves stress strength.

Iveco N60 ENT M37 PDF Repair Manual
The crankshaft is made in steel hardened by induction and rests on seven mountings inside the hollow shaft are the ducts for the lubrication oil circulation. On the front tang, the oil pump driving gear, the phonic wheel, the flywheel connecting hub and the driving pulley of the ancillary components are keyed on. On the rear tang the camshaft driving gear and the coupling flange to the engine flywheel are keyed on. The bench half bearing are in cast babbitt lining steel and the 6th is fitted with a shoulder ring to contain the end play of the driving shaft.

Details 1 and 2 in figure,assembled by negative allowance on the rear tang are not replaceable.The front and rear retaining rings are slide type with radial seal and require special fixtures to assemble and disassemble them.

They are made in steel, manufactured by pressing with small end oblique edged and cap separation obtained by fracture splitting technique. The connecting rod half bearings are cast babbitt lining steel. Every connecting rod is marked on the body and on the cap by a number that identifies their coupling and the cylinder into where has to be assembled moreover onto the body a letter has been impressed stating its weight class.

In the case a replacement is necessary, only one type of connecting rod is available as spare part of an intermediate class weight that can be used to replace anyone else. The connecting rods still efficient therefore, do not need to be replaced even if they are of a different class weight.

Pistons
The pistons integrate the high swirl combustion chamber the annular chambers inside the junk ring enable an effective heat elimination obtained by circulating the lubrication oil delivered by the spray nozzles mounted on the crankcase.On the piston skirt the are three seatings for the retaining rings the first one of these is obtained by a special trapezoidal section cast iron insert.