Komatsu SK815-5N, SK815-5NA Skid Steer Loader Service Repair Workshop Manual (SN: A30001 and up, A10001 and up)

CEBM015901 Shop Manual SK815 -5N SK815 -5NA SKID STEER LOADER SERIAL NUMBERS SK815-5N A30001 and up SK815-5NA A10001 and up ENGINES 4D88E-5 4D84E-5 This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in accordance with written authorization from Komatsu America Corp. It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make changes or improvements at any time without incurring any obligation to install such changes on products sold previously. Due to this continuous program of research and development, revisions may be made to this publication. It is recommended that customers contact their distributor for information on the latest revision. Copyright 2010 Komatsu Printed in U.S.A. Komatsu America Corp. February 2010

FOREWORD CONTENTS 00-2 b SK815-5N, SK815-5NA 12 CONTENTS 00 01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . 10-1 20 STANDARD VALUE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1 30 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1 50 DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-1 90 DIAGRAMS AND SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1

FOREWORD SK815-5N, SK815-5NA 00-2-1 1 The affected pages are indicated by using the following marks. It is requested that necessary actions be taken to these pages according to the table below. Mark Indication Action ❍ New page to be added Add ● Page to be replaced Replace ( ) Page to be deleted Discard Mark Page Rev ● 00-1 b ● 00-2 b ● 00-2-1 b ● 00-2-2 b ❍ 00-2-3 b ❍ 00-2-4 b ● 00-3 b ● 00-4 b ● 00-5 b ● 00-6 b ● 00-7 b ● 00-8 b ● 00-9 b ● 00-10 b ● 00-11 b ● 00-12 b ● 00-13 b ● 00-14 b ● 00-15 b ● 00-16 b ● 00-17 b ● 00-18 b ● 00-19 b ● 00-20 b ● 00-21 b ● 00-22 b ❍ 00-23 b ❍ 00-24 b ● 10-1 b ● 10-2 b ● 10-3 b ● 10-4 b ● 10-5 b ● 10-6 b ● 10-7 b ● 10-8 b ● 10-9 b ● 10-10 b ● 10-11 b ● 10-12 b ● 10-13 b ● 10-14 b ● 10-15 b ● 10-16 b ● 10-17 b ● 10-18 b ● 10-19 b ● 10-20 b ● 10-21 b ● 10-22 b ● 10-23 b ● 10-24 b ● 10-25 b ● 10-26 b ● 10-27 b ● 10-28 b ● 10-29 b Mark Page Rev ● 10-30 b ● 10-31 b ● 10-32 b ● 10-33 b ● 10-34 b ● 10-35 b ● 10-36 b ● 10-37 b ● 10-38 b ● 10-39 b ● 10-40 b ● 10-41 b ● 10-42 b ● 10-43 b ● 10-44 b ● 10-45 b ● 10-46 b ● 10-47 b ● 10-48 b ● 10-49 b ● 10-50 b ● 10-51 b ● 10-52 b ● 10-53 b ● 10-54 b ● 10-55 b ● 10-56 b ● 10-57 b ● 10-58 b Mark Page Rev ● 10-59 b ● 10-60 b ● 10-61 b ● 10-62 b ● 10-63 b ● 10-64 b ● 10-65 b ● 10-66 b ● 10-67 b ● 10-68 b ● 10-69 b ● 10-70 b ● 10-71 b ● 10-72 b ● 10-73 b ● 10-74 b ● 10-75 b ● 10-76 b ● 10-77 b ● 10-78 b ● 10-79 b ● 10-80 b ● 10-81 b ● 10-82 b ● 10-83 b ● 10-84 b ● 10-85 b ● 10-86 b ● 10-87 b Mark Page Rev SK815-5N, SK815-5NA

FOREWORD 00-2-2 1 SK815-5N, SK815-5NA ● 10-88 b ● 10-89 b ● 10-90 b ● 10-91 b ● 10-92 b ● 10-93 b ● 10-94 b ● 10-95 b ● 10-96 b ● 10-97 b ● 10-98 b ( ) 10-99 ( ) 10-100 ( ) 10-101 ( ) 10-102 ( ) 10-103 ( ) 10-104 ( ) 10-105 ( ) 10-106 ( ) 10-107 ( ) 10-108 ● 20-1 b ● 20-2 b ● 20-3 b ● 20-4 b ● 20-5 b ● 20-6 b ● 20-7 b ● 20-8 b ( ) 20-9 ( ) 20-10 ( ) 20-11 Mark Page Rev ( ) 20-12 ( ) 20-13 ( ) 20-14 ( ) 20-15 ( ) 20-16 ( ) 20-17 ( ) 20-18 ( ) 20-19 ( ) 20-20 ( ) 20-21 ( ) 20-22 ( ) 20-23 ( ) 20-24 ( ) 20-25 ( ) 20-26 ( ) 20-27 ( ) 20-28 ( ) 20-29 ( ) 20-30 ( ) 20-31 ( ) 20-32 ( ) 20-33 ( ) 20-34 ( ) 20-35 ( ) 20-36 ( ) 20-37 ( ) 20-38 ( ) 20-39 ( ) 20-40 ( ) 20-41 ( ) 20-42 ● 30-1 b Mark Page Rev ● 30-2 b ● 30-3 b ● 30-4 b ● 30-5 b ● 30-6 b ● 30-7 b ● 30-8 b ● 30-9 b ● 30-10 b ● 30-11 b ● 30-12 b ● 30-13 b ● 30-14 b ● 30-15 b ● 30-16 b ● 30-17 b ● 30-18 b ● 30-19 b ● 30-20 b ● 30-21 b ● 30-22 b ● 30-23 b ● 30-24 b ● 30-25 b ● 30-26 b ● 30-27 b ● 30-28 b ● 30-29 b ● 30-30 b ● 30-31 b ● 30-32 b ● 30-33 b ● 30-34 b Mark Page Rev ( ) 30-35 ( ) 30-36 ( ) 30-37 ( ) 30-38 ( ) 30-39 ( ) 30-40 ( ) 30-41 ( ) 30-42 ( ) 30-43 ( ) 30-44 ( ) 30-45 ( ) 30-46 ( ) 30-47 ( ) 30-48 ( ) 30-49 ( ) 30-50 ( ) 30-51 ( ) 30-52 ( ) 30-53 ( ) 30-54 ( ) 30-55 ( ) 30-56 ( ) 30-57 ( ) 30-58 ( ) 30-59 ( ) 30-60 ( ) 30-61 ( ) 30-62 ( ) 30-63 ( ) 30-64 ( ) 30-65 ( ) 30-66 ( ) 30-67 Mark Page Rev

FOREWORD SK815-5N, SK815-5NA 00-2-3 1 ( ) 30-68 ( ) 40-1 ( ) 40-2 ( ) 40-3 ( ) 40-4 ( ) 40-5 ( ) 40-6 ( ) 40-7 ( ) 40-8 ( ) 40-9 ( ) 40-10 ( ) 40-11 ( ) 40-12 ( ) 40-13 ( ) 40-14 ( ) 40-15 ( ) 40-16 ( ) 40-17 ( ) 40-18 ( ) 40-19 ( ) 40-20 ❍ 50-1 b ❍ 50-2 b ❍ 50-3 b ❍ 50-4 b ❍ 50-5 b ❍ 50-6 b ❍ 50-7 b ❍ 50-8 b ❍ 50-9 b ❍ 50-10 b Mark Page Rev ❍ 50-11 b ❍ 50-12 b ❍ 50-13 b ❍ 50-14 b ❍ 50-15 b ❍ 50-16 b ❍ 50-17 b ❍ 50-18 b ❍ 50-19 b ❍ 50-20 b ❍ 50-21 b ❍ 50-22 b ❍ 50-23 b ❍ 50-24 b ❍ 50-25 b ❍ 50-26 b ❍ 50-27 b ❍ 50-28 b ❍ 50-29 b ❍ 50-30 b ❍ 50-31 b ❍ 50-32 b ❍ 50-33 b ❍ 50-34 b ❍ 50-35 b ❍ 50-36 b ❍ 50-37 b ❍ 50-38 b ❍ 50-39 b ❍ 50-40 b ❍ 50-41 b ❍ 50-42 b ❍ 50-43 b Mark Page Rev ❍ 50-44 b ❍ 50-45 b ❍ 50-46 b ❍ 50-47 b ❍ 50-48 b ❍ 50-49 b ❍ 50-50 b ❍ 50-51 b ❍ 50-52 b ❍ 50-53 b ❍ 50-54 b ❍ 50-55 b ❍ 50-56 b ❍ 50-57 b ❍ 50-58 b ❍ 50-59 b ❍ 50-60 b ❍ 50-61 b ❍ 50-62 b ❍ 50-63 b ❍ 50-64 b ❍ 50-65 b ❍ 50-66 b ❍ 50-67 b ❍ 50-68 b ❍ 50-69 b ❍ 50-70 b ❍ 50-71 b ❍ 50-72 b ❍ 50-73 b ❍ 50-74 b ❍ 50-75 b ❍ 50-76 b Mark Page Rev ❍ 50-77 b ❍ 50-78 b ❍ 50-79 b ❍ 50-80 b ❍ 50-81 b ❍ 50-82 b ❍ 90-1 b ❍ 90-2 b ❍ 90-3 b ❍ 90-4 b ❍ 90-5 b ❍ 90-6 b ❍ 90-7 b ❍ 90-8 b ❍ 90-9 b ❍ 90-10 b ❍ 90-11 b ❍ 90-12 b ❍ 90-13 b ❍ 90-14 b ❍ 90-15 b ❍ 90-16 b ❍ 90-17 b ❍ 90-18 b ❍ 90-19 b ❍ 90-20 b ❍ 90-21 b ❍ 90-22 b ❍ 90-23 b ❍ 90-24 b ❍ 90-25 b ❍ 90-26 b Mark Page Rev

FOREWORD 00-2-4 1 ❍ 90-29 b ❍ 90-30 b ❍ 90-31 b ❍ 90-32 b ❍ 90-33 b ❍ 90-34 b ❍ 90-35 b ❍ 90-36 b ❍ 90-37 b ❍ 90-38 b ❍ 90-39 b ❍ 90-40 b ❍ 90-41 b ❍ 90-42 b ❍ 90-43 b ❍ 90-44 b ❍ 90-45 b ❍ 90-46 b ❍ 90-47 b ❍ 90-48 b ❍ 90-49 b ❍ 90-50 b ❍ 90-51 b ❍ 90-52 b ❍ 90-53 b ❍ 90-54 b ❍ 90-55 b ❍ 90-56 b ❍ 90-57 b ❍ 90-58 b ❍ 90-59 b ❍ 90-60 b ❍ 90-61 b Mark Page Rev ❍ 90-62 b ❍ 90-63 b ❍ 90-64 b ❍ 90-65 b ❍ 90-66 b ❍ 90-67 b ❍ 90-68 b ❍ 90-69 b ❍ 90-70 b ❍ 90-71 b ❍ 90-72 b Mark Page Rev Mark Page Rev Mark Page Rev

FOREWORD SAFETY SK815-5N, SK815-5NA 00-3 b 12 SAFETY 00 SAFETY NOTICE 00 GENERAL PRECAUTIONS 00 Mistakes in operation are extremely dangerous. Read the OPERATION & MAINTENANCE MANUAL carefully BEFORE operating the machine. 1. Before carrying out any greasing or repairs, read all the precautions given on the decals which are fixed to the machine. 2. When carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing. ● Always wear safety glasses when hitting parts with a hammer. ● Always wear safety glasses when grinding parts with a grinder, etc. 3. If welding repairs are needed, always have a trained, experienced welder carry out the work. When carrying out welding work, always wear welding gloves, apron, glasses, cap and other clothes suited for welding work.. 4. When carrying out any operation with two or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang "UNDER REPAIR" signs on the controls in the operator's compartment. 5. Keep all tools in good condition and learn the correct way to use them. 6. Decide on a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working. PREPARATIONS FOR WORK 00 1. Before adding oil or making repairs, park the machine on hard, level ground, and block the wheels or tracks to prevent the machine from moving. 2. Before starting work, lower blade, ripper, bucket or any other work equipment to the ground. If this is not possible, insert the safety pin or use blocks to prevent the work equipment from falling. In addition, be sure to lock all the control levers and hang warning signs on them. 3. When disassembling or assembling, support the machine with blocks, jacks or stands before starting work. IMPORTANT SAFETY NOTICE 00 Proper service and repair is extremely important for the safe operation of your machine. The service and repair techniques recommended and described in this manual are both effective and safe methods of operation. Some of these operations require the use of tools specially designed for the purpose. To prevent injury to workers, the symbols and are used to mark safety precautions in this manual. The cautions accompanying these symbols should always be followed carefully. If any dangerous situation arises or may possibly arise, first consider safety, and take the necessary actions to deal with the situation. WARNING! Never modify, weld, cut, or drill on any part of a ROPS structure. Doing so may weaken the structure which could lead to possible failure in a rollover situation

FOREWORD SAFETY 00-4 b SK815-5N, SK815-5NA 4. Remove all mud and oil from the steps or other places used to get on and off the machine. Always use the handrails, ladders or steps when getting on or off the machine. Never jump on or off the machine. If it is impossible to use the handrails, ladders or steps, use a stand to provide safe footing. PRECAUTIONS DURING WORK 00 1. When removing the oil filler cap, drain plug or hydraulic pressure measuring plugs, loosen them slowly to prevent the oil from spurting out. Before disconnecting or removing components of the oil, water or air circuits, first remove the pressure completely from the circuit. 2. The water and oil in the circuits are hot when the engine is stopped, so be careful not to get burned. Wait for the oil and water to cool before carrying out any work on the oil or water circuits. 3. Before starting work, remove the leads from the battery. ALWAYS remove the lead from the negative (-) terminal first. 4. When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage. Always use lifting equipment which has ample capacity. Install the lifting equipment at the correct places. Use a hoist or crane and operate slowly to prevent the component from hitting any other part. Do not work with any part still raised by the hoist or crane. 5. When removing covers which are under internal pressure or under pressure from a spring, always leave two bolts in position on opposite sides. Slowly release the pressure, then slowly loosen the bolts to remove. 6. When removing components, be careful not to break or damage the wiring, Damaged wiring may cause electrical fires. 7. When removing piping, stop the fuel or oil from spilling out. If any fuel or oil drips on to the floor, wipe it up immediately. Fuel or oil on the floor can cause you to slip, or can even start fires. 8. Gasoline or other fuels should never be used to clean parts. Clean part with appropriate solvents. 9. Be sure to assemble all parts again in their original places. Replace any damaged part with new parts. • When installing hoses and wires, be sure that they will not be damaged by contact with other parts when the machine is being operated. 10. When installing high pressure hoses, make sure that they are not twisted. Damaged tubes are dangerous, so be extremely careful when installing tubes for high pressure circuits. Also check that connecting parts are correctly installed. 11. When assembling or installing parts, always use the specified tightening torques. When installing protective parts such as guards, or parts which vibrate violently or rotate at high speed, be particularly careful to check that they are installed correctly. 12. When aligning two holes, never insert your fingers or hand. Be careful not to get your fingers caught in a hole. 13. When measuring hydraulic pressure, check that the measuring tool is correctly assembled before taking any measurements. 14. Take care when removing or installing the tracks of track-type machines. When removing the track, the track separates suddenly, so never let anyone stand at either end of the track. 15. When jump starting the machine, only use a machine of similar size and voltage. Never use a arc welder or other electrical generating equipment to jump start the machine. Carefully review the safety and procedures for jump starting the machine.

FOREWORD GENERAL SK815-5N, SK815-5NA 00-5 b 12 GENERAL 00 This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity. This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following sections. These sections are further divided into each main group of components. GENERAL This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and lubricant specification charts. STRUCTURE, FUNCTION AND MAINTENANCE STANDARD This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. In addition, this section gives the judgement standards when inspecting disassembled parts. STANDARD VALUE TABLE This section explains the standard values for new machine and judgement criteria for testing, adjusting and troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts in troubleshooting. TESTING AND ADJUSTING This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. TROUBLESHOOTING Troubleshooting charts correlating “Problems” to “Causes” are also included in this section. DISASSEMBLY AND ASSEMBLY This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations. DIAGRAMS AND SCHEMATICS This section has the foldout drawings for the machine. NOTICE The specifications contained in this shop manual are subject to change at any time and without any advance notice. Contact your distributor for the latest information.

FOREWORD HOW TO READ THE SHOP MANUAL 00-6 d SK815-5N, SK815-5NA 12 HOW TO READ THE SHOP MANUAL 00 VOLUMES 00 Shop manuals are issued as a guide to carrying out repairs. They are divided as follows: Chassis volume: Issued for every machine model Engine volume: Issued for each engine series Electrical volume: Each issued as one to cover all models Attachment volume: Each issued as one to cover all models These various volumes are designed to avoid duplication of information. Therefore to deal with all repairs for any model, it is necessary that chassis, engine, electrical and attachment be available. DISTRIBUTION AND UPDATING 00 Any additions, amendments or other changes will be sent to your distributors. Get the most up-to-date information before you start any work. FILING METHOD 00 1. See the page number on the bottom of the page. File the pages in correct order. 2. Following examples show how to read the page number: Example: 10 - 3 Item number (10. Structure and Function) Consecutive page number for each item 3. Additional pages: Additional pages are indicated by a hyphen (-) and numbered after the page number. File as in the example. Example: REVISED EDITION MARK 00 When a manual is revised, an edition mark (bcd…) is recorded on the bottom outside corner of the pages. REVISIONS 00 Revised pages are shown at the LIST OF REVISED PAGES between the title page and SAFETY page. SYMBOLS 00 So that the shop manual can be of ample practical use, important places for safety and quality are marked with the following symbols. 10-4 10-4-1 Added pages 10-4-2 10-5 Symbol Item Remarks Safety Special safety precautions are necessary when performing the work. ★ Caution Special technical precautions or other precautions for preserving standards are necessary when performing the work. Weight Weight of parts or systems. Caution necessary when selecting hoisting wire or when working posture is important, etc. Tightening torque Places that require special attention for tightening torque during assembly. Coat Places to be coated with adhesives and lubricants etc. Oil, water Places where oil, water or fuel must be added, and the capacity. Drain Places where oil or water must be drained, and quantity to be drained.

Komatsu SK815-5N, SK815-5NA Skid Steer Loader Service Repair Workshop Manual (SN: A30001 and up, A10001 and up)

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