New Holland N843, N843H, N843L, N844, N844L, N844LT, N844T Service Manual

Part number 47632230 2 nd edition English April 2014 Replaces part number 84392536 SERVICE MANUAL N843H / N843L / N843 / N844LT / N844L / N844T / N844 ISM Tier 3 Engine

Contents INTRODUCTION Engine....................................................................................... 10 [10.001] Engine and crankcase ............................................................. 10.1 [10.102] Pan and covers .................................................................... 10.2 [10.106] Valve drive and gears .............................................................. 10.3 [10.101] Cylinder heads ..................................................................... 10.4 [10.105] Connecting rods and pistons ....................................................... 10.5 [10.103] Crankshaft and ﬂywheel ............................................................ 10.6 [10.110] Balancer and damper .............................................................. 10.7 [10.114] Pump drives ........................................................................ 10.8 [10.218] Fuel injection system ............................................................... 10.9 [10.250] Turbocharger and lines........................................................... 10.10 [10.254] Intake and exhaust manifolds and mufﬂer ....................................... 10.11 [10.400] Engine cooling system ........................................................... 10.12 [10.304] Engine lubrication system ........................................................ 10.13 Electrical systems ....................................................................... 55 [55.525] Cab engine controls ................................................................ 55.1 [55.201] Engine starting system ............................................................. 55.2 [55.301] Alternator ........................................................................... 55.3 [55.202] Cold start aid ....................................................................... 55.4 [55.010] Fuel injection system ............................................................... 55.5 [55.012] Engine cooling system ............................................................. 55.6 [55.013] Engine oil system .................................................................. 55.7 47632230 31/03/2014

INTRODUCTION 47632230 31/03/2014 1

Contents INTRODUCTION Foreword ........................................................................................ 3 Foreword - Important notice regarding equipment servicing .................................... 4 Safety rules ..................................................................................... 5 Safety rules - Ecology and the environment .................................................... 6 47632230 31/03/2014 2

INTRODUCTION Foreword This publication contains data, features instructions and methods for performing repair operations on the assembly and its components and is addressed to qualiﬁed, specialized personnel. Check to make sure you have the right publication related to the component you are about to work on before you start. Make sure that you have all the necessary safety equipment: safety glasses, helmet, gloves, footwear, etc. Check that the working lifting and transport equipment is available and in working order. Make sure that vehicle is secured. Proceed by carefully observing the instructions contained in this publication and use the indicated speciﬁc tools to ensure correct repair procedures and safety of operators. NOTE: This manual applies to multiple applications, therefore images may not all be accurate. 47632230 31/03/2014 3

INTRODUCTION Foreword - Important notice regarding equipment servicing All repair and maintenance work listed in this manual must be carried out only by qualiﬁed dealership personnel, strictly complying with the instructions given, and using, whenever possible, the special tools. Anyone who performs repair and maintenance operations without complying with the procedures provided herein shall be responsible for any subsequent damages. The manufacturer and all the organizations of its distribution chain, including - without limitation - national, regional, or local dealers, reject any responsibility for damages caused by parts and/or components not approved by the manufacturer, including those used for the servicing or repair of the product manufactured or marketed by the manufacturer. In any case, no warranty is given or attributed on the product manufactured or marketed by the manufacturer in case of damages caused by parts and/or components not approved by the manufacturer. The information in this manual is up-to-date at the date of the publication. It is the policy of the manufacturer for continuous improvement. Some information could not be updated due to modiﬁcations of a technical or commercial type, or changes to the laws and regulations of different countries. In case of questions, refer to your CNH Sales and Service Networks. 47632230 31/03/2014 4

INTRODUCTION Safety rules Personal safety This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible death or injury. Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special instructions. These precautions are intended for the personal safety of you and those working with you. Read and understand all the safety messages in this manual before you operate or service the machine. DANGER indicates a hazardous situation that, if not avoided, will result in death or serious injury. WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury. CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury. FAILURE TO FOLLOW DANGER, WARNING, AND CAUTION MESSAGES COULD RESULT IN DEATH OR SERIOUS INJURY. Machine safety NOTICE: Notice indicates a situation that, if not avoided, could result in machine or property damage. Throughout this manual you will find the signal word Notice followed by special instructions to prevent machine or property damage. The word Notice is used to address practices not related to personal safety. Information NOTE: Note indicates additional information that clarifies steps, procedures, or other information in this manual. Throughout this manual you will find the word Note followed by additional information about a step, procedure, or other information in the manual. The word Note is not intended to address personal safety or property damage. 47632230 31/03/2014 5

INTRODUCTION Safety rules - Ecology and the environment Soil, air, and water are vital factors of agriculture and life in general. When legislation does not yet rule the treatment of some of the substances required by advanced technology, sound judgment should govern the use and disposal of products of a chemical and petrochemical nature. NOTE: The following are recommendations that may be of assistance: • Become acquainted with and ensure that you understand the relative legislation applicable to your country. • Where no legislation exists, obtain information from suppliers of oils, filters, batteries, fuels, antifreeze, cleaning agents, etc., with regard to their effect on man and nature and how to safely store, use, and dispose of these substances. • Agricultural consultants will, in many cases, be able to help you as well. Helpful hints • Avoid filling tanks using cans or inappropriate pressurized fuel delivery systems that may cause considerable spillage. • In general, avoid skin contact with all fuels, oils, acids, solvents, etc. Most of them contain substances that may be harmful to your health. • Modern oils contain additives. Do not burn contaminated fuels and or waste oils in ordinary heating systems. • Avoid spillage when draining off used engine coolant mixtures, engine, gearbox and hydraulic oils, brake fluids, etc. Do not mix drained brake fluids or fuels with lubricants. Store them safely until they can be disposed of in a proper way to comply with local legislation and available resources. • Modern coolant mixtures, i.e. antifreeze and other additives, should be replaced every two years. They should not be allowed to get into the soil, but should be collected and disposed of properly. • Do not open the air-conditioning system yourself. It contains gases that should not be released into the atmosphere. Your CNH dealer or air conditioning specialist has a special extractor for this purpose and will have to recharge the system properly. • Repair any leaks or defects in the engine cooling or hydraulic system immediately. • Do not increase the pressure in a pressurized circuit as this may lead to a component failure. • Protect hoses during welding as penetrating weld splatter may burn a hole or weaken them, allowing the loss of oils, coolant, etc. 47632230 31/03/2014 6

SERVICE MANUAL Engine N843H , N843L , N843 , N844LT , N844L , N844T , N844 47632230 31/03/2014 10

Contents Engine - 10 [10.001] Engine and crankcase ............................................................... 10.1 [10.102] Pan and covers ...................................................................... 10.2 [10.106] Valve drive and gears ................................................................ 10.3 [10.101] Cylinder heads ....................................................................... 10.4 [10.105] Connecting rods and pistons ......................................................... 10.5 [10.103] Crankshaft and ﬂywheel .............................................................. 10.6 [10.110] Balancer and damper ................................................................ 10.7 [10.114] Pump drives .......................................................................... 10.8 [10.218] Fuel injection system ................................................................. 10.9 [10.250] Turbocharger and lines............................................................. 10.10 [10.254] Intake and exhaust manifolds and mufﬂer ......................................... 10.11 [10.400] Engine cooling system ............................................................. 10.12 [10.304] Engine lubrication system .......................................................... 10.13 47632230 31/03/2014 10

New Holland N843, N843H, N843L, N844, N844L, N844LT, N844T Service Manual

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