Chainsaw operator's manual : the safe use of chainsaws: 6th

Introduction 1 Level 1 Cross-cutting (Basic competence for safe chainsaw operation – harvest trees manually) 3 Professional attitude 4 Workplace safety 5 Risk assessment for chainsaw users 5 Dangerous trees 7 Occupational hazards 8 Personal protection equipment 9 Basic safety 10 Starting a chainsaw 13 Kick-back 15 Safety warning signs used throughout the NSW timber industry 19 Power head maintenance 20 Daily service 21 Fortnightly service 22 Guide bar maintenance 23 Chainsaw power head trouble-shooting chart 24 The cutting attachment 26 Sprockets 26 Guide bar 28 Sawchain 30 Chain components 30 Cutters 30 Reduced vibration chain 32 Sawchain sharpening 33 Depth gauge setting 34 ‘Breaking-in’ a new sawchain 35 Chain tension 35 Hand filing 36 Sawchain design 39 Cross-cutting sequence 41 Basic principles of cross-cutting 41 Assessment of internal stresses in fallen timber 42 Types of binds 42 Top bind 42 Top bind using a wedge 42 Bottom bind 42 Side bind 43 Log trap 44 Wind blow 45 Limbing 46 Limbing small to medium-sized conifers 47 Limbing large trees 48 Butt trimming 49 Basic principles 49 Level 2 Simple tree felling (Intermediate competence of safe chainsaw operation – harvest trees manually) 51 Theory of felling 52 Importance of directional felling 53 Considerations before felling each tree 53 Preparation at each tree prior to felling 55 Clean around base of tree 55 Prepare escape route 56 Contents Chainsaw Operator’s Manual | i Theory of simple tree felling 58 Scarf 58 Standard scarf 59 Features of a scarf 59 Technique for cutting the scarf 60 Other types of scarf 61 Humbolt scarf 61 V scarf 61 Box scarf 61 90؛ scarf 61 Size of opening 62 Cuts meet exactly 62 Line of scarf is horizontal 62 Back cut 63 Holding wood (hingewood) 64 Wedges 65 Types 65 When used 65 Using a wedge 65 Level 3 Problem tree felling (Advanced competence of safe chainsaw operation – harvest trees manually) 67 Problem tree felling techniques 68 Tree with side lean 68 Uneven holding wood 68 Uneven holding wood with wedges 68 Uneven holding wood with plunge side cuts 69 Tree with forward lean 70 Technique No.1 70 Technique No.2 70 Small tree with the use of a wedge or felling bar 71 Tree diameter over twice guide bar length 72 Double leader 73 Felling ‘dangerous’ trees 74 Defective trees 74 Snags (stags) 74 Felling defective trees 75 Wind blow 76 Manual felling hung-up trees 77 Removal of tree lying across road/track 77 Machine assisted manual tree felling 77 Line pull 78 Line guide 79 Pushing tree over with a crawler tractor – dozer blade 80 Tree jacking 81 Competencies for safe chainsaw operation – Forest and Forest Products Industry Training Package 55 Level 1 84 FPIC2007A Maintain chainsaws 84 FPIH2001A Trim and cross-cut felled trees – Production 85 FPIH2003A Harvest trees manually – Basic 89 Level 2 93 FPIH3020A Harvest trees manually – Intermediate 93 Level 3 97 FPIH3041A Harvest trees manually – Advanced 97 Additional reference material 101