MAN Diesel Engine Repair Manual (EN)

Foreword

Foreword This Repair Manual is designed to facilitate proper repair of the engines listed here. The pictures and associated descriptions show typical work that may not always be applicable to the en- gine in hand, which nevertheless does not mean that they are not correct. In such cases, the repair work is to be planned and carried out in a similar way. It is compulsory that the engine be removed before performing any of the work described in this Repair Manual. The expert knowledge necessary for handling diesel engines was taken for granted when this publication was compiled. Note:

Only use fuel, coolants and lubricants in accordance with MAN regulations, otherwise the manu- facturer’s warranty will not apply! For basic information on the fuels see the publication “Fuels, Lubricants and Coolants for MAN Diesel Engines”. You can find the approved products on the Internet at: http://www.man-mn.com/ " Products & Solutions " E-Business Any repair of components such as injection pump, alternator etc. ought to be left to our or the manufac- turer’s service department. Best regards MAN Nutzfahrzeuge Aktiengesellschaft Nuremberg Plant Since our products are in continuous development, we reserve the right to make technical modifications.

© 2005 MAN Nutzfahrzeuge Aktiengesellschaft Reprinting, copying or translation, even of extracts, is not allowed without written permission from MAN. All rights under the copyright law are strictly reserved by MAN. MTDB Technical status: 08.2005 51 . 99493−8414 1

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Instruction

Instruction Important instructions concerning technical safety and personal protection are, as shown below, especially highlighted. Danger: This refers to working and operating procedures which must be complied with in order to rule out the risk to persons. Caution: This refers to working and operating procedures which must be complied with in order to prevent damage to or destruction of material. Note: Explanatory descriptions which help in understanding the relevant work or operating procedure to be carried out. Assembly of pipes Danger: No pipes may be bent. Risk of breakage!

Fitting flat seals / gaskets Gaskets are frequently used with sealants or adhesives as an aid to assembly or to achieve a better seal. Above all when parts with different levels of thermal expansion (e.g. aluminium and cast iron) are bonded, this can mean that the gasket is shifted during operation by the so-called stitching or sewing machine effect and leaks occur. Example: The cap of the front crankshaft seal. If a sealing agent or an adhesive is used here the flat seal will move inwards in the course of time as a result of the different expansion rates of the materials. Oil will be lost, for which the shaft seal may be thought to be responsible.

Perfect assembly of gaskets can only be achieved if the following instructions are adhered to: D Use only genuine MAN seals / gaskets. D The sealing faces must be undamaged and clean. D Do not use any sealing agent or adhesive − as an aid to fitting the seals a little grease can be used if necessary so that the seal will stick to the part to be fitted. D Tighten bolts evenly to the specified torque. Assembly of round sealing rings D Use only genuine MAN round sealing rings. D The sealing faces must be undamaged and clean. D Always wet round sealing rings with engine oil before fitting them. 2

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Instruction

Instruction Masking of fuel and lube oil pipe con- nections (for classified engines only) The unions of pressurised oil and fuel pipes are masked with a protective tape. If this tape is removed during a repair, the unions must be masked with protective tape again after- wards. The following pipes are affected: Oil supply pipe to turbochargers Fuel pipes between supply pump, filter and injection pump Injection pipes protected against leaks 1 Fig. 1 A protective tape is wound around the unions. En- sure that there is 50 % overlap on every pass. Figs. 2−4 The unions to be masked must be clean and free of oil and grease. Do not apply the protective tape unless this is the case 2 3 4 3

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Contents

Contents Foreword 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instruction 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety instructions 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trouble shooting table 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General information on the overhaul of engines 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commissioning after engine overhaul 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine views, D 2848 LE401 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine views, D 2840 LE401 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine views, D 2842 LE406 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cross section of engine 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Longitudinal section of a D 2842 LE 401 engine 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic diagram of engine lubrication system 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic diagram of cooling system 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic diagram of fuel system 32 . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel system Checking and adjusting start of fuel delivery 33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel injection pump 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing injection pump 39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing fuel injectors 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . Checking and repairing fuel injectors 44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cleaning fuel prefilter 47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing fuel filter cartridges 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cooling system Draining and filling with coolant 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing thermostats and water pump 51 . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repairing water pump 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cleaning cooling system 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing heat exchanger 60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing pipe cluster for heat exchanger 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking and repairing pipe cluster for heat exchanger 65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cleaning heat exchanger pipe set 67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing impeller of raw water pump 68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing raw-water pump 70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication Changing oil filter 71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . Removing and installing oil cooler 72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing oil pump 73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing oil spray nozzle 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel Removing and installing vibration damper, changing front crankshaft seal 79 . . . . . . . . . . . . . . . . . . . . . Removing and installing flywheel, replacing gear ring 84 . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . Removing and installing crankshaft seal (flywheel end) 86 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exchanging bearing race 87 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft seals 88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intake / exhaust system Removing and installing intake manifold 89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintaining air filter 91 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing exhaust manifold with 8-hole-flange 92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing and installing exhaust manifold with 4-hole-flange 94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbocharger, trouble shooting 96 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checking the charge-air pressure 98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing and installing turbocharger 99 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

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