Issuu

CEBM031900

Shop Manual

HYDRAULIC EXCAVATOR SERIAL NUMBERS

PC350LC-8M0 A33901 and up

ENGINE

6D114E-3

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.

FOREWORD

CONTENTS

12 CONTENTS

INDEX AND FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . 10-1

STANDARD VALUE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1

TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-1

DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-1

APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80-1

DIAGRAMS AND SCHEMATICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1

00-2

PC350LC-8M0

FOREWORD

SAFETY

12 SAFETY

SAFETY NOTICE

IMPORTANT SAFETY NOTICE

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 that purpose. To prevent injury to workers, the symbol is used to mark safety precautions in this manual. The cautions accompanying this symbol 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.

GENERAL PRECAUTIONS

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.. 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 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.

PC350LC-8M0

6. Decide 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

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. 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

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.

00-3

FOREWORD 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.

SAFETY 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.

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.

00-4

PC350LC-8M0

FOREWORD 12 GENERAL

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 judgments. 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 judgment standards when inspecting disassembled parts. STANDARD VALUE TABLE This section explains the standard values for new machine and judgment 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.

PC350LC-8M0

00-5

FOREWORD

HOW TO READ THE SHOP MANUAL

12 HOW TO READ THE SHOP MANUAL

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

Any additions, amendments or other changes will be sent to your distributors. Get the most up-to-date information before you start any work.

SYMBOLS

So that the shop manual can be of ample practical use, important places for safety and quality are marked with the following symbols. 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.

Places that require special Tightening attention for tightening torque torque during assembly.

00-6

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.

PC350LC-8M0

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FOREWORD

HOISTING INSTRUCTIONS

12 HOISTING INSTRUCTIONS

HOISTING

and a serious accident can result. Hooks have maximum strength at the middle portion.

WARNING! Heavy parts (25 kg or more) must be lifted with a hoist etc. In the DISASSEMBLY AND ASSEMBLY section, every part weighing 25 kg or more is indicated clearly with the symbol.

If a part cannot be smoothly removed from the machine by hoisting, the following checks should be made: 1. Check for removal of all bolts fastening the part to the relative parts. 2. Check for existence of another part causing interface with the part to be removed.

WIRE ROPES

1. Use adequate ropes depending on the weight of parts to be hoisted, referring to the table below: Wire ropes (Standard “Z” or “S” twist ropes without galvanizing) Rope diameter

Allowable load

tons

9.8

1.0

11.2

13.7

1.4

12.5

15.7

1.6

21.6

2.2

27.5

2.8

35.3

3.6

43.1

4.4

22.4

54.9

5.6

98.1

10.0

176.5

18.0

274.6

28.0

392.2

40.0

3. Do not sling a heavy load with one rope alone, but sling with two or more ropes symmetrically wound on to the load. WARNING! Slinging with one rope may cause turning of the load during hoisting, untwisting of the rope, or slipping of the rope from its original winding position on the load, which can result in a dangerous accident 4. Do not sling a heavy load with ropes forming a wide hanging angle from the hook. When hoisting a load with two or more ropes, the force subjected to each rope will increase with the hanging angles. The table below shows the variation of allowable load (kg) when hoisting is made with two ropes, each of which is allowed to sling up to 1000 kg vertically, at various hanging angles. When two ropes sling a load vertically, up to 2000 kg of total weight can be suspended. This weight becomes 1000 kg when two ropes make a 120° hanging angle. On the other hand, two ropes are subject to an excessive force as large as 4000 kg if they sling a 2000 kg load at a lifting angle of 150°.

The allowable load value is estimated to be 1/6 or 1/7 of the breaking strength of the rope used. 2. Sling wire ropes from the middle portion of the hook. Slinging near the edge of the hook may cause the rope to slip off the hook during hoisting,

PC350LC-8M0

00-7

FOREWORD 12 PUSH PULL COUPLER

PUSH PULL COUPLER 00

WARNING! Before carrying out the following work, release the residual pressure from the hydraulic tank. For details, see TESTING AND ADJUSTING, Releasing residual pressure from hydraulic tank. WARNING! Even if the residual pressure is released from the hydraulic tank, some hydraulic oil flows out when the hose is disconnected. Accordingly, prepare an oil receiving container.

TYPE 1 DISCONNECTION

1. Release the residual pressure from the hydraulic tank. For details, see TESTING AND ADJUSTING, Releasing residual pressure from hydraulic tank. 2. Hold the adapter (1) and push the hose joint (2) into the mating adapter (3). The adapter can be pushed in about 3.5 mm. Do not hold the rubber cap portion (4). 3. After the hose joint (2) is pushed into the adapter (3), press the rubber cap portion (4) against the adapter until it clicks. 4. Hold the hose adapter (1) or hose (5) and pull it out. Since some hydraulic oil flows out, prepare an oil receiving container.

CONNECTION

1. Hold the hose adapter (1) or hose (5) and insert it in the mating adapter (3), aligning them with each other. Do not hold the rubber cap portion (4). 2. After inserting the hose in the mating adapter, pull it back to check its connecting condition. When the hose is pulled back, the rubber cap portion moves toward the hose about 3.5 mm. This does not indicate an abnormality.

00-8

PC350LC-8M0

FOREWORD

TYPE 2 DISCONNECTION

PUSH PULL COUPLER 00

1. Hold the mouthpiece of the tightening portion and push body (2) in straight until sliding prevention ring (1) contacts contact surface a of the hexagonal portion at the male end.

2. Hold in the condition in Step 1, and turn the lever (4) to the right - clockwise.

3. Hold in the condition in Steps 1 and 2, and pull out the whole body (2) to disconnect it.

CONNECTION

1. Hold the mouthpiece of the tightening portion and push body (2) in straight until sliding prevention ring (1) contacts surface a of the hexagonal portion at the male end to connect it.

PC350LC-8M0

00-9

FOREWORD 12 TYPE 3

DISCONNECTION

PUSH PULL COUPLER 00

1. Hold the mouthpiece of the tightening portion and push the body (2) in straight until sliding prevention ring (1) contacts surface a of the hexagonal portion at the male end.

2. Hold in the condition in Step 1, and push until the cover (3) contacts surface a of the hexagonal portion at the male end.

3. Hold in the condition in Steps 1 and 2, and pull out the whole body (2) to disconnect it.

CONNECTION

1. Hold the mouthpiece of the tightening portion and push the body (2) in straight until the slide prevention ring (1) contacts surface a of the hexagonal portion at the male end to connect it.

00-10

PC350LC-8M0

FOREWORD

COATING MATERIALS

12 COATING MATERIALS

The recommended coating materials prescribed in the shop manuals are listed below. Category

Code LT-1A

Adhesives

LT-1B

Part No.

Quantity

Container

790-129-9030

150 g

Tube

Used to prevent rubber gaskets, rubber cushions and cork plugs from coming out

20 g (2 pes.)

Polyethylene container

Used in places requiring an immediately effective, strong adhesive. Used for plastics (except polyethylene, polypropylene, tetrafluoroethylene, and vinyl chloride), rubber, metal and nonmetal. Features: Resistance to heat, chemicals Used for anti-loosening and sealant purposes for bolts and plugs. Used as adhesive or sealant for metal, glass or plastic.

790-129-9050

Main applications, features

LT-2

09940-00030

50 g

Polyethylene container

LT-3

790-129-9060 (Set of adhesive and hardening agent)

Adhesive: 1 kg Hardening agent: 500 g

Can

LT-4

790-129-9040

250 g

Polyethylene container

Holtz 790-126-9120 MH 705

75 g

Tube

Used as heat-resisting sealant for repairing engine.

Polyethylene container

Quick hardening type adhesive. Cure time: within 5 sec. to 3 min. Used mainly for adhesion of metals, rubbers, plastics and woods.

50 g

Polyethylene container

Quick hardening type adhesive. Quick cure type (max. strength after 30 minutes). Used mainly for adhesion of rubbers, plastics and metals.

50 cc

Polyethylene container

Features: Resistance to heat, chemicals Used at joint portions subject to high temperature.

Three bond 1735

Aronalpha 201

Loctite 648-50

PC350LC-8M0

179-129-9140

790-129-9130

79A-129-9110

Used as sealant for machined holes.

00-11

FOREWORD Category

Code LG-1

Gasket sealant

LG-3

LG-4

LG-5

COATING MATERIALS Part No.

Quantity

Container

790-129-9010

200 g

Tube

Used as adhesive or sealant for gaskets and packing of power train case, etc.

Can

Features: Resistance to heat Used as sealant for flange surfaces and bolts at high temperature locations; used to prevent seizure. Used as sealant for heat resistant gasket for at high temperature locations such as engine pre-combustion chamber, exhaust pipe.

200 g

Tube

Features: Resistance to water, oil Used as sealant for flange surface, thread. Also possible to use as sealant for flanges with large clearance. Used as sealant for mating surfaces of final drive case, transmission case.

1 kg

Polyethylene container

Used as sealant for various threads, pipe joints, flanges. Used as sealant for tapered plugs, elbows, nipples of hydraulic piping.

Tube

Features: Silicon based, resistant to heat, cold. Used as sealant for flange surface, thread. Used as sealant for oil pan, final drive case, etc.

790-129-9070

790-129-9020

790-129-9080

1 kg

Gasket sealant

Molybdenum disulfide lubricant

LG-6

00-12

09940-00011

250 g

Main applications, features

LG-7

09920-00150

150 g

Tube

Features: Silicon based, quick hardening type. Used as sealant for flywheel housing, intake manifold, oil pan, thermostat housing, etc.

Three bond 1211

790-129-9090

100 g

Tube

Used as heat-resisting sealant for repairing engines.

LM-G

09940-00051

60 g

Can

Used as lubricant for sliding parts (to prevent squeaking).

Tube

Used to prevent seizure or scuffing of the thread when press fitting or shrink fitting. Used as lubricant for linkage, bearings, etc.

LM-P

09940-00040

200 g

PC350LC-8M0

FOREWORD Category

Part No.

Quantity

Container

G2-LI

SYG2-400LI SYG2-350LI SYG2-400LI-A SYG2-160LI SYGA160CNLI

Various

General purpose type

G2-CA

SYG2-400CA SYG2-350CA SYG2-400CA-A SYG2-160CA SYG2160CNCA

Various

Used for normal temperature, light load bearing at places in contact with water or steam.

SYG2-400M

400 g (10 per case)

Belows type

Molybdenum disulfide lubricant

Grease

Code

COATING MATERIALS

PC350LC-8M0

Main applications, features

Used for places with heavy load.

00-13

FOREWORD

STANDARD TIGHTENING TORQUE

12 STANDARD TIGHTENING TORQUE

STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS

The following charts give the standard tightening torques of bolts and nuts. Exceptions are given in DISASSEMBLY AND ASSEMBLY.

Thread diameter of bolt

Width across flats

lbf ft

11.8 - 14.7

8.70 - 10.84

27 - 34

19.91 - 25.07

59 - 74

43.51 - 54.57

98 - 123

72.28 - 90.72

153 - 190

112.84 - 140.13

235 - 285

173.32 - 210.20

320 - 400

236.02 - 295.02

455 - 565

335.59 - 416.72

610 - 765

449.91 - 564.23

785 - 980

578.98 - 722.81

1150 - 1440

848.19 - 1062.09

1520 - 1910

1121.09 - 1408.74

1960 - 2450

1445.62 - 1807.02

2450 - 3040

1807.02 - 2242.19

2890 - 3630

2131.55 - 2677.35

Thread diameter of bolt

Width across flats

lbf ft

5.9 - 9.8

4.35 - 7.22

13.7 - 23.5

10.10 - 17.33

34.3 - 46.1

25.29 - 34.00

74.5 - 90.2

54.94 - 66.52

00-14

PC350LC-8M0

FOREWORD

STANDARD TIGHTENING TORQUE

12 TIGHTENING TORQUE OF HOSE NUTS

Use these torques for hose nuts. Thread diameter

Width across flat

lbf ft

19.6 - 29.4

14.5 - 21.7

29.4 - 68.6

21.7 - 50.6

58.9 - 98.1

44.4 - 72.4

107.9 - 166.7

79.6 - 123.0

147.1 - 205.9

108.5 - 151.9

147.1 - 245.1

108.5 - 180.8

196.2 - 294.2

144.7 - 217.0

245.2 - 343.2

180.9 - 253.1

Nominal No.

Tightening torque

TIGHTENING TORQUE OF SPLIT FLANGE BOLTS

Use these torques for split flange bolts. Thread diameter

Width across flat

Tightening torque

kgm

59 - 74

43.51 - 54.57

98 - 123

72.28 - 90.72

235 - 285

173.32 - 210.20

TIGHTENING TORQUE FOR FLARED NUTS

Use these torques for flared part of nut.

Thread diameter

Width across flat

lbf ft

24.5 ± 4.9

18.0 ± 3.6

49 ± 19.6

36.1 ± 14.4

78.5 ± 19.6

57.8 ± 14.4

137.3 ± 29.4

101.2 ± 21.6

176.5 ± 29.4

130.1 ± 21.6

196.1 ± 49

144.6 ± 36.1

245.2 ± 49

180.8 ± 36.1

294.2 ± 49

216.9 ± 36.1

PC350LC-8M0

Tightening torque

00-15

PC350LC-8M0 Komatsu Shop Service Manual PDF Download