Komatsu PC340-6K, PC340LC-6K, PC340NLC-6K Hydraulic Excavator Index:

1. Foreword …………………………………………………………………………………………………………………………. 0-1
2. Safety information ……………………………………………………………………………………………………………… 0-2
3. Introduction ………………………………………………………………………………………………………………………. 0-4
4. Location of plates, table to enter serial No. and distributor ……………………………………………………….. 0-5
SAFETY
6. General Precautions…………………………………………………………………………………………………………… 1-2
7. Precautions during operation ………………………………………………………………………………………………. 1-8
7.1 Before starting engine …………………………………………………………………………………………………… 1-8
7.2 Operating machine ……………………………………………………………………………………………………… 1-10
7.3 Transportation …………………………………………………………………………………………………………….. 1-15
7.4 Battery ………………………………………………………………………………………………………………………. 1-16
7.5 Towing ………………………………………………………………………………………………………………………. 1-17
7.6 Bucket with hook ………………………………………………………………………………………………………… 1-18
8. Precautions for maintenance ……………………………………………………………………………………………… 1-21
8.1 Before carrying out maintenance…………………………………………………………………………………… 1-21
8.2 During maintenance ……………………………………………………………………………………………………. 1-24
9. Position for attaching safety labels ……………………………………………………………………………………… 1-28
OPERATION
10. General view
10.1 General view of machine …………………………………………………………………………………………….. 2-2
10.2 General view of controls and gauges ……………………………………………………………………………. 2-3
11. Explanation of components
11.1 Machine monitor ……………………………………………………………………………………………………….. 2-4
11.2 Switches ………………………………………………………………………………………………………………… 2-15
11.3 Control levers, pedals ………………………………………………………………………………………………. 2-19
11.4 Roof hatch ……………………………………………………………………………………………………………… 2-24
11.5 Front window ………………………………………………………………………………………………………….. 2-25
11.6 Door lock ……………………………………………………………………………………………………………….. 2-27
11.7 Cap, cover with lock…………………………………………………………………………………………………. 2-28
11.8 Luggage box…………………………………………………………………………………………………………… 2-29
11.9 Ashtray ………………………………………………………………………………………………………………….. 2-29
11.10 Heater …………………………………………………………………………………………………………………… 2-29
11.11 Air conditioner ………………………………………………………………………………………………………… 2-30
11.12 Car radio ……………………………………………………………………………………………………………….. 2-33
11.13 Fuse ……………………………………………………………………………………………………………………… 2-34
11.14 Fusible link …………………………………………………………………………………………………………….. 2-35
11.15 Controllers ……………………………………………………………………………………………………………… 2-35
11.16 Tool box …………………………………………………………………………………………………………………. 2-35
11.17 Refuelling pump ……………………………………………………………………………………………………… 2-35
11.18 Handling the accumulator …………………………………………………………………………………………. 2-36
0-8
PC340-ENG
12. Operation
12.1 Check before starting engine ……………………………………………………………………………………… 2-38
12.2 Starting engine ………………………………………………………………………………………………………… 2-48
12.3 Operations and checks after starting engine …………………………………………………………………2-51
12.4 Moving machine off ………………………………………………………………………………………………….. 2-57
12.5 Steering machine …………………………………………………………………………………………………….. 2-60
12.6 Stopping machine…………………………………………………………………………………………………….. 2-62
12.7 Swinging …………………………………………………………………………………………………………………. 2-63
12.8 Operation of work equipment …………………………………………………………………………………….. 2-64
12.9 Working mode selection ……………………………………………………………………………………………. 2-65
12.10 Prohibitions for operation ………………………………………………………………………………………….. 2-67
12.11 Precaution for operation …………………………………………………………………………………………… 2-69
12.12 Precaution when travelling up or down hills …………………………………………………………………. 2-70
12.13 How to escape from mud ………………………………………………………………………………………….. 2-72
12.14 Work possible using hydraulic excavator ……………………………………………………………………..2-73
12.15 Replacement and inversion of bucket ………………………………………………………………………….2-74
12.16 Parking the machine ………………………………………………………………………………………………… 2-76
12.17 Check after finishing work ………………………………………………………………………………………… 2-77
12.18 Stopping engine ……………………………………………………………………………………………………… 2-78
12.19 Check after stopping engine ……………………………………………………………………………………… 2-79
12.20 Locking ………………………………………………………………………………………………………………….. 2-79
12.21 Overload warning device ………………………………………………………………………………………….. 2-79
13 Transportation
13.1 Loading, unloading work …………………………………………………………………………………………… 2-80
13.2 Precautions for loading ……………………………………………………………………………………………… 2-82
13.3 Precautions for transportation ……………………………………………………………………………………. 2-83
13.4 Lifting the machine …………………………………………………………………………………………………… 2-83
14. Cold weather operation
14.1 Precaution for low temperature…………………………………………………………………………………… 2-85
14.2 Precautions after completion of work ………………………………………………………………………….. 2-86
14.3 After cold weather ……………………………………………………………………………………………………. 2-86
15. Long-term storage
15.1 Before storage …………………………………………………………………………………………………………. 2-87
15.2 During storage …………………………………………………………………………………………………………. 2-88
15.3 After storage ……………………………………………………………………………………………………………. 2-88
15.4 Starting machine after long-term storage ……………………………………………………………………..2-88
16. Troubleshooting
16.1 Phenomena that are not failures ………………………………………………………………………………… 2-89
16.2 Method of towing machine…………………………………………………………………………………………. 2-89
16.3 Using method for light-weight towing hole …………………………………………………………………….2-89
16.4 Precautions on particular jobsites ………………………………………………………………………………. 2-90
16.5 If battery is discharged ……………………………………………………………………………………………… 2-90
16.6 Other trouble …………………………………………………………………………………………………………… 2-94

MAINTENANCE
17. Guides to maintenance ………………………………………………………………………………………………………. 3-2
18. Outlines of service ……………………………………………………………………………………………………………… 3-5
18.1 Outline of oil, fuel, coolant ………………………………………………………………………………………….. 3-5
18.2 Outline of electric system …………………………………………………………………………………………… 3-9
18.3 Outline of hydraulic system ………………………………………………………………………………………. 3-10
19. Wear parts list …………………………………………………………………………………………………………………. 3-11
20. Use of fuel, coolant and lubricants according to ambient temperature …………………………………….. 3-12
21. Standard tightening torques for bolts and nuts ……………………………………………………………………… 3-16
21.1 Introduction of necessary tools …………………………………………………………………………………… 3-16
21.2 Torque list ……………………………………………………………………………………………………………….. 3-17
22. Periodic replacement of safety critical parts …………………………………………………………………………. 3-18
23. Maintenance schedule chart ……………………………………………………………………………………………… 3-20
23.1 Maintenance schedule chart ……………………………………………………………………………………… 3-20
23.2 Maintenance interval when using hydraulic breaker ……………………………………………………….3-22
24. Service procedure ……………………………………………………………………………………………………………. 3-23
24.1 Initial 250 hours service …………………………………………………………………………………………….. 3-23
24.2 When required …………………………………………………………………………………………………………. 3-24
24.3 Check before starting ……………………………………………………………………………………………….. 3-45
24.4 Every 50 hours service ……………………………………………………………………………………………… 3-49
24.5 Every 100 hours service ……………………………………………………………………………………………. 3-51
24.6 Every 250 hours service ……………………………………………………………………………………………. 3-54
24.7 Every 500 hours service ……………………………………………………………………………………………. 3-61
24.8 Every 1000 hours service ………………………………………………………………………………………….. 3-67
24.9 Every 2000 hours service ………………………………………………………………………………………….. 3-73
24.10 Every 4000 hours ……………………………………………………………………………………………………. 3-80
SPECIFICATIONS
25. SPECIFICATIONS ……………………………………………………………………………………………………………… 4-2
25.1 Machine specifications ……………………………………………………………………………………………….. 4-2
25.2 Explanation of lifting capacity chart ………………………………………………………………………………. 4-5
5. CONTENTS
0-10
PC340-ENG
OPTIONS AND ATTACHMENTS
26 General Precautions…………………………………………………………………………………………………………… 5-2
26.1 General precautions related to safety …………………………………………………………………………….. 5-2
26.2 Precautions when installing attachments ……………………………………………………………………….. 5-3
27. Handling bucket with hook …………………………………………………………………………………………………… 5-4
27.1 Checking for damage to bucket with hook ………………………………………………………………………. 5-4
27.2 Prohibited operations ………………………………………………………………………………………………….. 5-4
27.3 Precautions during operation ……………………………………………………………………………………….. 5-4
28 Machine ready for attachments ……………………………………………………………………………………………. 5-5
28.1 Explanation of components ………………………………………………………………………………………….. 5-5
28.2 Hydraulic circuit ………………………………………………………………………………………………………….. 5-7
28.3 Attachment mounting / dismounting procedure ……………………………………………………………….. 5-9
28.4 Operation ………………………………………………………………………………………………………………… 5-11
28.5 Long-term storage …………………………………………………………………………………………………….. 5-12
28.6 Specifications …………………………………………………………………………………………………………… 5-12
29. Introduction of attachments ……………………………………………………………………………………………….. 5-13
29.1 Specification, use ……………………………………………………………………………………………………… 5-13
29.2 Attachment installing combination table ……………………………………………………………………….. 5-14
29.3 Selection of track shoes …………………………………………………………………………………………….. 5-15
29.4 Selection of bucket teeth ……………………………………………………………………………………………. 5-16
29.5 Handling trapezoidal bucket ……………………………………………………………………………………….. 5-17
29.6 Handling extension arm ……………………………………………………………………………………………… 5-18
30. Extending machine service life ……………………………………………………………………………………………. 5-19
30.1 Hydraulic breaker ……………………………………………………………………………………………………… 5-19
30.2 Power ripper …………………………………………………………………………………………………………….. 5-22
30.3 Fork grab …………………………………………………………………………………………………………………. 5-23
30.4 Grapple bucket …………………………………………………………………………………………………………. 5-24
30.5 Scrap grapple …………………………………………………………………………………………………………… 5-25
30.6 Crusher & cutter ……………………………………………………………………………………………………….. 5-26
30.7 Hydraulic pile driver …………………………………………………………………………………………………… 5-27
30.8 Hydraulic excavator with multi-purpose crane ………………………………………………………………..5-28