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Oregon Harvester Handbook

Oregon Harvester Handbook

Mechanical timber
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Harvesting Handbook

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Summary of Contents for Oregon Harvester

  • Page 1 Oregon Mechanical Timber ® Harvesting Handbook...
  • Page 2 (defined as production, reliability, and life of operation) and safe use of Oregon Harvester Cutting Systems. A Harvester saw chain based cutting system is composed of a drive sprocket, guide bar, and a loop of saw chain, that is not hand-held, and designed to work with mechanical harvester machines.

  • Page 3: Table Of Contents

    • How a Cutter Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Oregon® Harvester Saw Chain •...
  • Page 4 Saw Chain Maintenance Saw Chain Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 – 30 •...
  • Page 5 Replacing Nose Sprockets with Replacement Nose Kits on RH, SM, and SN Harvester Guide Bars . . . . . . . . . . . . . . . . . . 81-82...

  • Page 6: Key Safety Information

    Key Safety Information Chain Shot WARNING: There is risk of serious injury or death to the machine operator, ground personnel and bystanders from chain shot. A Chain Shot Event (CSE) occurs when a piece or pieces of cutting chain from the end of a broken saw chain in mechanized timber harvesting or processing is ejected at a high velocity.

  • Page 7: How Chain Shot Happens

    Key Safety Information How Chain Shot Happens 1 . The saw chain breaks 2 . After a saw chain break, the “free” end of the saw chain begins to whip away from the break . 3 . If the saw chain is not contained by the saw box or a chain shot guard, the broken saw chain’s free end can speed up rapidly, carrying immense dynamic energy .

  • Page 8: Minimizing The Risk Of A Chain Shot Event

    Important Safety Information Minimizing the Risk of a Chain Shot Event To minimize your risk of a chain shot event: • You should follow the recommendations of your equipment manufacturer and those contained in this handbook . • Your machine should be equipped with appropriate window enclosures, chain catchers, chain shot guards, and snow holes (shielded or closed) near the cutting system on the saw box .

  • Page 9: Windows

    Important Safety Information Windows • The glazing of the operator's enclosure window should comply with local codes for impact resistance . The glazing should be replaced if any scratches (or other damage) obstructs the operator's effective viewing of the cutting operation .

  • Page 10: Chain Catcher

    Important Safety Information Chain Catcher A chain catcher prevents a saw chain that has escaped from the bar groove from being “thrown” from the saw box . Chain catchers resemble a sturdy spool and are placed in line with the drive sprocket .

  • Page 11: Operational Recommendations

    Operational Recommendations Mechanical Timber Harvesting Handbook...

  • Page 12: Operational Parameters, Service Life, And Safety

    Operational Recommendations Cutting Systems Operational Parameters, Service Life, and Safety. Recommendations for saw chain speed and guide bar feed load (listed in our Technical Data tables) are intended to provide a balance between performance and cutting system life . WARNING: Exceeding recommendations may result in cutting system wear and shorter service life .

  • Page 13: Technical Data

    Operational Recommendations Technical Data (Metric Units) .404" Pitch 3/4" Pitch Oregon Saw Chain Part Number 18HX 19HX 11BC Operating Parameters Guide bar/Saw chain oil mL/cut Power, at saw motor kW min/max 5/50 15/50 5/65 5/75 Force on guide bar to tension saw chain, N Guide Bar Feed Load, at Center, N Min/max...

  • Page 14: Chain Tension

    Operational Recommendations At startup: • Adequate time must be allowed for your lubrication to reach your cutting system . In cold weather, or when using a new guide bar or saw chain, your system will require additional time . Follow these guidelines: •...
  • Page 15 Operational Recommendations Manual Tensioning Systems • Saw chain should be tight enough to pull the chassis of the saw chain firmly against the perimeter of the guide bar . • Tension needs to be checked regularly . • Only tension saw chain when it is cool . Steel expands when hot and contracts as it cools .
  • Page 16 Operational Recommendations Automatic Tensioning Systems An automatic tensioning system is the most effective means to keep proper saw chain tension, especially if it is designed to compensate for the saw chain’s high speed around a guide bar (the saw chain will lengthen as its speed increases) . The system can be optimized to respond to the changing loop length as your saw chain goes from rest, to full speed, to rest .

  • Page 17: Saw Chain Speed

    Operational Recommendations Saw Chain Allowable Spindle RPM (.404" Pitch) (3/4" Pitch) Drive Sprocket Teeth Maximum Recommended Maximum 6500 7600 5700 6700 13100 5100 5900 11800 4500 5300 10700 4100 4800 9800 3800 4400 9000 3500 4100 8400 3200 3800 7800 3000 3500 7300...

  • Page 18: Installation And Break-In

    Operational Recommendations Installation and Break-In The critical time for saw chain occurs during the break-in period for a new (or newly sharpened) saw chain . We recommend transporting your new (or newly sharpened) saw chain to the job site in a container with lubricant . Leave them in the container until they are needed .

  • Page 19: Best Practices

    Operational Recommendations Best Practices Daily Inspections Check your safety devices at least once per shift : • Chain shot guard • Chain catcher • Shields on snow holes • Windows • Cutting system Run chain and guide bar in sets to equalize wear across the cutting system .

  • Page 20: Cutting Safety

    Operational Recommendations WARNING: There is risk of serious injury or death to the machine operator, ground personnel and bystanders from chain shot . Do not exceed our recommendations for saw chain speed, feed-force, lubrication, tension, and maintenance . Cutting Safety •...
  • Page 21 Mechanical Timber Harvesting Handbook...

  • Page 22: Saw Chain

    Saw Chain Mechanical Timber Harvesting Handbook...
  • Page 23 Mechanical Timber Harvesting Handbook...

  • Page 24: Terminology

    Tang Saw Chain Pitch Saw chain pitch is the distance between any three consecutive rivets, divided by two . Oregon Harvester saw chain is available in both .404" and 3/4" pitch . Saw Chain Gauge Saw Chain Gauge is the term used to describe the thickness of the drive link tang, which fits into the groove of the guide bar .

  • Page 25: Parts Of A Cutter

    Saw Chain Parts of a Cutter Working (cutting) corner Top plate Side plate Depth gauge Rivet hole Gullet Heel Parts of a Saw Chain Depth Rivet Left-hand cutter gauge Drive link Right-hand Tie-strap cutter How a Cutter Works Understanding how cutters work can help you realize why proper saw chain maintenance is so important .
  • Page 26 Oregon Harvester Saw Chain ® 18HX – Harvester Saw Chain, Micro Chisel – .404" ® Features and Benefits • Micro Chisel cutters have small-radius working corners for excellent performance and ease of maintenance . • Patented saw chain steel that provides greater durability, especially in cold cutting conditions .
  • Page 27 File Depth File File Grind Grind Guide Gauge Wheel Wheel 70502 12211 31686 38850 OR534-316 OR4125-316 596397 Harvester multi-purpose tool | | .050" 7/32" 35° 10° 80° 1 .27 mm .050" 3/16" 35° 10° 60° 1 .27 mm Mechanical Timber Harvesting Handbook...
  • Page 28 Oregon Harvester Saw Chain ® 19HX – Harvester Saw Chain, Chamfer Chisel – .404" ™ The 19HX chain is optimized for modern high-flow, high-power heads1 and saw motors for faster cutting speed . It features tall chamfer chisel cutters that combine best-in-class durability with improved chip clearance, to deliver faster and more consistent cuts in all types of wood .
  • Page 29 File Depth File File Grind Grind Guide Gauge Wheel Wheel 70502 12211 31686 38850 OR534-316 OR4125-316 596397 Harvester multi-purpose tool | | .050" 7/32" 35° 10° 80° 1 .27 mm .050" 3/16" 35° 10° 60° 1 .27 mm Note: The use of any other than Oregon 19HX part numbers for repair or joining loops is not approved and voids the product warranty .
  • Page 30 Oregon Harvester Saw Chain ® 11H – Harvester Saw Chain, Semi-Chisel – 3/4" The 11H semi-chisel cutter features more aggressive design for maximum performance on more powerful machines . Features and Benefits • Semi-chisel cutters make 11H an aggressive, high-performance saw chain .
  • Page 31 File Depth File File Grind Grind Guide Gauge Wheel Wheel 90410 12211 107529 26800 OR534-316 – 533700 Harvester multi-purpose tool | | .060" 5/16" 30° 0° 80° 1 .52 mm .070" 5/16" 30° 0° 80° 1 .78 mm .060" 5/16"...
  • Page 32 Oregon Harvester Saw Chain ® 11BC – Harvester Saw Chain, Chipper – 3/4" 11BC is a big 3/4"-pitch .122"-gauge saw chain, built for mechanical harvester/processor applications . Features classic chipper-style cutters . Features and Benefits • Chipper cutters have fully rounded working corners and side plates for a big, aggressive bite, easy sharpening, and edge- holding durability .
  • Page 33 Depth File File Grind Grind Guide Gauge Wheel Wheel 90410 12211 31686 26800 OR534-316 – 533700 Harvester multi-purpose tool | | .060" 5/16" 35° 0° 85° 1 .52 mm .060" 5/16" 35° 0° 60° 1 .52 mm Mechanical Timber Harvesting Handbook...

  • Page 34: Saw Chain Maintenance

    Saw Chain Maintenance WARNING: To reduce risk of injury, always use personal protective equipment (gloves and safety glasses) when handling saw chain . Saw Chain Maintenance Before sharpening, you should: Clean • Clean your saw chain, removing dirt, debris, and lubricant . This step is required before you inspect the chain .

  • Page 35: Repair

    Saw Chain Maintenance Repair • Replace bent, cracked, or damaged saw chain components only when the proper tools and new components are available . • When replacing damaged components, ensure the replacements match the worn components . New parts need to be filed to match the parts you're removing to ensure the chain's durability is not affected .

  • Page 36: Sharpening And Maintenance

    Saw Chain Maintenance Sharpening and Maintenance See the following charts for more detail on sharpening angles . Filing and Grinding Angles |X| .050" 18HX 7/32" 35° 10° 80° 1 .27 mm .050" 19HX 7/32" 35° 10° 80° 1 .27 mm .060"...

  • Page 37: Optional Sharpening Angles

    Saw Chain Maintenance Optional Sharpening Angles Oregon provides a factory grind to suit a majority of our users, but we also provide the approved, alternative sharpening specifications that users may prefer for certain cutting conditions . Cutting Conditions 18HX/19HX Factory 35°...

  • Page 38: Sharpening And Maintenance Tools

    Saw Chain Maintenance Sharpening and Maintenance Tools 710-120 720-120 730-120 ✝ ✝ ✝ Standard All-in-One Auto Grinder Standard Auto Grinder Only available in USA. *Sharpens 3/4" pitch only ✝ 620-120 (620-230) 530-120H 520-120 (520-230) Bench Grinder with 3/4" Pitch .404" Pitch Hydraulic Assist Bench Grinder Bench Grinder...

  • Page 39: Multi-Purpose Tool Functions

    Breaker Anvil for Breaker Anvil Harvester Bar Noses 3/4" Pitch Saw Chain 533700 3/4" Pitch Harvester Multi-Purpose Tool 596397 .404" Pitch Harvester Multi-Purpose Tool Harvester Multi-Purpose Tool Functions Bar Alignment Tool Bar Groove Cleaner Bar Groove Depth Grinding Wheel Bar Straightener...

  • Page 40: Sharpening Saw Chain With A Round File

    Saw Chain Maintenance 18HX 31686 40458 – 70502 12211 38850 OR 534-316 596397 19HX 31686 40458 – 70502 12211 38850 OR 534-316 596397 11BC 107617 – 90410 – 12211 – OR 534-516 533700 107617 – 90410 – 12211 – OR 534-516 533700 Note: The above products have different Part Numbers outside of North America.

  • Page 41: Sharpening Saw Chain With A Grinder

    Saw Chain Maintenance 4 . Always file from the inside of the chassis to the outside as shown below . outside inside 5 . Repeat the process for the cutters on the other side of the chain, keeping all geometries equaland finishing all cutters from one side of your saw chain at the same time .

  • Page 42: Grinding Wheels

    Saw Chain Maintenance Grinding Wheels WARNING: Grinding wheels can break . To reduce risk of injury, inspect for damage including cracks, and voids . • Run Grinder for one minute before grinding . • Keep tool guards in place . No matter what kind of grinding wheel you use, be sure to keep it clean and well maintained .

  • Page 43: How To Set Depth Gauges

    Saw Chain Maintenance How to Set Depth Gauges After filing or grinding, check and adjust depth gauges – depth gauges control the “bite” of your saw chain . Using the correct depth gauge tool for your saw chain: 1 . Place the tool on top of your saw chain so one depth gauge protrudes through the slot of the tool .

  • Page 44: Saw Chain Repair

    Saw Chain Repair How to Break Out Rivets WARNING: To reduce risk of injury, wear eye protection and gloves . 1 . Determine the appropriate anvil and anvil slot for the pitch of your saw chain . 2 . Insert the saw chain to be broken into the proper slot of the anvil, then push it forward until the bottom tie-strap is flush with the far side of the anvil slot .

  • Page 45: Joining Saw Chain

    . • The rivet head must be snug and secure while allowing all joined parts to move freely . • For best results with Oregon Harvester Saw Chain, we recommend using the Oregon Heavy-Duty Rivet Spinner to spin the chains .
  • Page 46 Saw Chain Repair 3 . Cutter and tie-strap replacement parts should be filed back to match the existing chassis parts as shown below . OREGON OREGON OREGON OREGON 18HX 18HX 18HX 18HX OREGON OREGON OREGON OREGON 18HX 18HX 18HX 18HX 4 .
  • Page 47 Follow these instructions to join your Harvester saw chain with the rivet spinner: 1 . For Oregon .404"-pitch Harvester Saw Chain (18HX, 19HX), use take up handle “A” and anvil “A” . Do not use a hammer to assemble .

  • Page 48: Saw Chain Troubleshooting

    Saw Chain Troubleshooting Most Harvester saw chain problems are caused by: • Excessive saw chain speed and/or feed force . • Poor maintenance practices . • Lack of lubrication or the use of poor quality lubricants . Here are the things to look for and the associated corrective actions you should take: Cuts slow, cuts rough, or won’t hold an edge...
  • Page 49 Saw Chain Troubleshooting 4. Too little top-plate filing angle. Cause: Filed or ground at less than the recommended angle . Symptoms: Slow cutting . Requires extra effort to cut . Possible binding in cut . 20˚ Remedy: Resharpen cutters while holding the file at the correct top-plate filing angle for the saw chain .
  • Page 50 Saw Chain Troubleshooting 8. Backslope on the side plate. Cause: File held too high or the file is too large . Grinders: Saw chain ground at the wrong top- plate cutting angle, grinding wheel is too large, or the grinding wheel is not grinding deep enough into the body of cutter .

  • Page 51: Cutters Or Tie-Straps Wear Heavily Or Break

    Saw Chain Troubleshooting Cutters or tie-straps wear heavily or break. 11. Excessive heel wear on cutters and opposite tie-straps; cracks under rear rivet holes. Cause: Forcing dull saw chain to cut . Low depth gauge settings . Lack of lubrication . Loose saw chain tension .

  • Page 52: Drive Links Wear Heavily Or Break

    Saw Chain Troubleshooting Drive links wear heavily or break. 14. Straight or concave bottoms. Cause: Straight bottoms are due to shallow guide bar body groove . Concave bottoms are due to shallow guide bar nose groove . Symptoms: Drive link tangs worn straight or concave .
  • Page 53 Saw Chain Troubleshooting 17. Drive link tang turned up. Cause: Worn drive sprocket . Symptoms: Drive link tangs hit the bottom . Remedy: Replace drive sprocket, sharpen drive link tangs (as shown in Sharpening Drive Link Tangs; see page 49) if possible, or replace the saw chain .

  • Page 54: Sharpening Drive Link Tangs

    Saw Chain Troubleshooting Sharpening Drive Link Tangs Pointed drive link tangs help remove chips and debris from your guide bar groove . Sharpen damaged tangs back to their original shape with a round file . Saw chain has tight joints. 19.

  • Page 55: Saw Chain Cuts Crookedly/Leans To One Side/Cuts Unevenly

    . Note: Prevent the bar from being bent and touching the saw box . Always make sure the felling cut is done before moving the harvester head with the crane . 22. Different cutter top-plate lengths Cause: Inconsistent sharpening .

  • Page 56: Guide Bars

    Guide Bars Mechanical Timber Harvesting Handbook...
  • Page 57 Mechanical Timber Harvesting Handbook...

  • Page 58: Understanding Bar Part Numbers

    Guide Bars Bar Mount Gauge Pitch Bar length Understanding Bar Part Numbers Oregon bar part numbers are printed on the bar package, and have 10 digits. Here's what each digit means. 75 2 SM R L114 Length Gauge Nose Type Pitch Mount .404...

  • Page 59: Guide Bar Types

    Solid Harvester Replaceable Sprocket-Nose Bar RHF Jet-Fit Solid Harvester Sprocket-Nose Bar HSF ® Jet-Fit Solid Harvester Replaceable Sprocket-Nose Bar RHF ® Stump Spray Solid Harvester Sprocket-Nose Bar HRF and HLF SpeedMax XL Harvester Sprocket-Nose Bar SMR ™ Mechanical Timber Harvesting Handbook...

  • Page 60: Guide Bar Types

    Guide Bars Guide Bar Types: 3/4" Pitch Harvester Sprocket-Nose Bar SNC Harvester Sprocket-Nose Bar with Jet-Fit and Stump Spray SNC Harvest Armor Tip Bar ATV Double-Ended Slasher / Pond & Deck Bars DEA, DEB, DEC Symmetrical Asymmetrical Slasher / Pond & Deck Bars UEA, UEB, UED...

  • Page 61: Bar Noses

    .404" Pitch Guide Bar Mounts Bar Noses: Solid and Replaceable Sprocket Nose Pitch and Rivet Tooth Count Gauge Part No. Part No. .404" • 11T 0.080" 101918 529035* .404" • 11T 0.080" 537245 529035* .404" • 14T 0.080" SMR14T 578147* 3/4"...
  • Page 62 .404" Pitch Guide Bar Mounts D104 D104 Drive sprocket tooth count: 17, 18, 19 Dimensions: Œ .394" x 3 .338"  .404" x .555" L003 Drive sprocket tooth count: 11, 12, 13 Dimensions: Œ .7/8" ( .875")  .448" L104 Drive sprocket tooth count: 11, 12, 13...
  • Page 63 .404" Pitch Guide Bar Mounts L148 Drive sprocket tooth count: 11, 12, 13 Dimensions: Œ .394" (10 mm) x 3 .338"  .555" x .404" Ž .435" L205 Drive sprocket tooth count: 11, 12, 13 Dimensions: Œ .555" x .404" ...
  • Page 64 .404" Pitch Guide Bar Mounts N104 Drive sprocket tooth count: 14, 15, 16 Dimensions: Œ .394" (10 mm) x 3 .338"  .555" x .404" N114 Drive sprocket tooth count: 14, 15, 16 Dimensions: Œ .394" (10 mm) x 3 .338" ...
  • Page 65 .404" Pitch Guide Bar Mounts Q/R114 Drive sprocket tooth count: Q: 11, 12, 13 R: 14, 15, 16 Dimensions: Œ .399" x 3 .338"  .404" x .555" Ž .435" Q/S163 Drive sprocket tooth count: Q: 11, 12, 13 S: 17, 18, 19 Dimensions: Œ...
  • Page 66 .404" Pitch Guide Bar Mounts B149 Drive sprocket tooth count: 14, 15, 16 Dimensions: Œ .581" (15 mm) x 3 .406"  .413" x .848" Ž .492" Mechanical Timber Harvesting Handbook...

  • Page 67: .404" Pitch Jet Fit Guide Bar Mounts

    .404" Pitch Jet Fit Guide Bar Mounts B163 Drive sprocket tooth count: 14, 15, 16 Dimensions: Œ .581" (15 mm) x 3 .406"  .413" x .838" D149 Drive sprocket tooth count: 17, 18 Dimensions: Œ .581" (15 mm) x 3 .406"...
  • Page 68 .404" Pitch Jet Fit Guide Bar Mounts L172 Drive sprocket tooth count: 11, 12, 13 Dimensions: Œ .581" (15 mm) x 3 .406"  .413" x .814" Ž .492" NOTE: Not interchangeable with L149 or L163 mounts Mechanical Timber Harvesting Handbook...

  • Page 69: 3/4"-Pitch Guide Bar Mounts

    3/4" Pitch Guide Bar Mounts C159 Drive sprocket tooth count: 7, 8 Dimensions: Œ .635" x 4 .502"  .190" radius Ž .151" radius C211 Drive sprocket tooth count: 7, 8 Dimensions: Œ .394" x 3 .338"  .404" x .555" F212 Drive sprocket tooth count:...
  • Page 70 3/4" Pitch Guide Bar Mounts G138 Drive sprocket tooth count: 11,12 Dimensions: Œ .635" x 7 .410"  .650" G138 J134 Drive sprocket tooth count: Dimensions: Œ .562" J211 Drive sprocket tooth count: Dimensions: Œ .394" x 3 .338"  .555"...
  • Page 71 3/4" Pitch Guide Bar Mounts K187 Drive sprocket tooth count: 7, 8 Dimensions: Œ .375" x2 .966"  .250" K187 K205 Drive sprocket tooth count: 7, 8 Dimensions: Œ .645"  .410" K225 Drive sprocket tooth count: 7, 8 Dimensions: Œ...
  • Page 72 3/4" Pitch Guide Bar Mounts T130 Drive sprocket tooth count: 9, 10 Dimensions: Œ .875" x 4 .054"  .531" x 3" T132 Drive sprocket tooth count: 9, 10 Dimensions: Œ .531" x 3 .064"  .562" T133 Drive sprocket tooth count: 9, 10 Dimensions:...
  • Page 73 3/4" Pitch Guide Bar Mounts T145 Drive sprocket tooth count: 9, 10 Dimensions: Œ .570" T146 Drive sprocket tooth count: 9, 10 Dimensions: Œ .637" x 3 .627"  .531" T151 Drive sprocket tooth count: 9, 10 Dimensions: Œ .535" x 3 .226"...
  • Page 74 3/4" Pitch Guide Bar Mounts T161 Drive sprocket tooth count: 9, 10 Dimensions: Œ .447" x 5 .500"  .880" x .568" Ž .531" x 2 .281" T168 Drive sprocket tooth count: 9, 10 Dimensions: Œ .609"  .562" T177 Drive sprocket tooth count: 9, 10...
  • Page 75 3/4" Pitch Guide Bar Mounts T208 Drive sprocket tooth count: 9, 10 Dimensions: Œ .515" x 4 .129"  .770" T210 Drive sprocket T208 3/4” tooth count: 9, 10 Dimensions: Œ .782" T217 Drive sprocket T210 3/4” tooth count: 9, 10 Dimensions: Œ...
  • Page 76 3/4" Pitch Guide Bar Mounts T221 Drive sprocket tooth count: 9, 10 Dimensions: Œ .760" x 4 .374"  .760" T222 T221 3/4” Drive sprocket tooth count: 9, 10 Dimensions: Œ .679" T222 3/4” T223 Drive sprocket tooth count: 9, 10 Dimensions: Œ...
  • Page 77 3/4" Pitch Guide Bar Mounts T227 Drive sprocket tooth count: 9, 10 Dimensions: Œ .875" x 4 .000"  .500" x 1 .196" T227 3/4” T229 Drive sprocket tooth count: 9, 10 Dimensions: Œ .880" x 7 .584"  .506" x 2 .842"...

  • Page 78: 3/4"-Pitch Symmetrical Two-Ended Guide Bar Mounts

    3/4" Pitch Guide Bar Mounts Symmetrical Double-Ended 9135 Drive sprocket tooth count: 9, 10 Dimensions: Œ .906" x 4 .500"  .531" x 3 .000" Ž .375" 9136 Drive sprocket tooth count: 9, 10 Dimensions: Œ .516" 9164 Drive sprocket tooth count: 9, 10 Dimensions:...

  • Page 79: 3/4"-Pitch Asymmetrical Double-Ended Mounts

    3/4" Pitch Guide Bar Mounts Asymmetrical Double-Ended 9155 Drive sprocket tooth count: 15 Sprocket end dimension: Œ .656" Idler end dimension:  .531" 9191 Drive sprocket tooth count: 14 Sprocket end dimension: Œ .760" Idler end dimension:  .531" H175 Drive sprocket tooth count: 21 Œ...
  • Page 80 3/4" Pitch Guide Bar Mounts Asymmetrical Double-Ended P155 Drive sprocket tooth count: 15 Sprocket end dimension: Œ .656" Idler end dimension:  .531" P207 Drive sprocket tooth count: 15 Sprocket end dimension: Œ .781" Idler end dimension:  .531" P207 P207 Mechanical Timber Harvesting Handbook...
  • Page 81 Mechanical Timber Harvesting Handbook...

  • Page 82: Guide Bar Maintenance

    Inspect for damage and component wear; (refer to Guide Bar Troubleshooting, pgs . 83 – 90) replace as needed . Check bar groove depth after dressing by using the Oregon Harvester Multi-Purpose tool . Clean guide bar grooves and oil holes . Oil hole Turn your guide bar over to equalize bar wear .
  • Page 83 Guide Bar Maintenance 1/32"( 0,8 mm ) Bar Rail Dresser, p/n 111589 makes it easy to remove effects of normal wear and remove minor damage . On sprocket-nose guide bars, check for clearance around the guide bar’s tip, between the tops of rails, and the chassis .

  • Page 84: Replacing Nose Sprockets On Hs Harvester Guide Bars

    Replacing Nose Sprockets on HS Harvester Guide Bars WARNING: Wear eye protection and gloves . Select a new Harvester nose sprocket with the correct gauge for your guide bar and saw chain . 1 . Using a 1/4" drill bit, drill out head from each of the nose sprocket rivets .
  • Page 85 Sprocket Nose Replacement: HS 4 . Inside the nose sprocket package, you’ll find the new sprocket wrapped in a tissue . Be careful to keep the sprocket inside the tissue as you remove it from the package — bearings are easily lost .

  • Page 86: Replacing Nose Sprockets With Replacement Nose Kits On

    Sprocket Nose Replacement Nose: RH, SM, and SN Guide Bars Replacing Nose Sprockets with Replacement Nose Kits on RH, SM, and SN Guide Bars 1 . Using the Oregon heavy-duty chain breaker #24548, break out the bar tip attachment rivets . 2 .
  • Page 87 Sprocket Nose Replacement Nose: RH, SM, and SN Guide Bars 5 . File down the rails of the new nose to align with the rails of the old guide bar body . 6 . Clean out the bar groove to ensure it is free of possible debris .

  • Page 88: Guide Bar Troubleshooting

    Guide Bar Troubleshooting Rail Conditions 1. Rails are worn down, groove becomes shallow. Cause: Normal wear on rails . Symptoms: Chain rides on groove bottom causing drive link damage, chain leans during cutting . Remedy: Guide bar is at the end of life, replace the guide bar .
  • Page 89 Guide Bar Troubleshooting 4. Rails around the tip of solid- nose guide bars show small cracks or broken-out sections. Cause: Accidents or irregular operating techniques, which push drive links sideways or place excessive pressure on the nose, can cause breaks or cracks . Symptoms: Damage to tie-straps and cutters, saw chain throws, short guide bar life .
  • Page 90 Guide Bar Troubleshooting 7. Blue spots at the tail of the guide bar. Cause: Misaligned drive sprocket or rails pinched because debris not removed from saw pad or guide bar when the guide bar was installed . Symptoms: Blue spots on rails indicate temperatures reaching 600°...
  • Page 91 Guide Bar Troubleshooting 10. Rail on one side worn low. Cause: Damaged or dull cutters on one side, or saw chain leaning over in a worn groove, or using .063" saw chain in .080" guide bar . Most often one short rail is caused by the cutters contacting rocks on one side of the saw chain, usually the cutters closest...

  • Page 92: Guide Bar Nose Conditions

    Guide Bar Troubleshooting Nose Conditions 11. Chipped rails or excessive rail wear a few inches back from the nose end of the bar. Cause: Loose saw chain tension . Symptoms: Saw chain damage, saw chain throwing, shortened guide bar life . Remedy: Use proper saw chain tension and invert the guide bar on the saw periodically to distribute wear .
  • Page 93 Guide Bar Troubleshooting 14. Nose burned at tip from the saw chain sliding on rails of the sprocket nose guide bar, or from the sprocket being recessed into the tip. Cause: High saw chain tension from automatic saw chain tensioners . Symptoms: Nose breakage from bearings wearing quickly and jamming .

  • Page 94: Guide Bar Mount Conditions

    . Remedy: Replace broken guide bars and use the holding pins/bolts originally supplied with the guide bar holder . When purchasing a new harvester head, consider purchasing head compatible with Jet-Fit guide bars . Jet-Fit Mount Conditions 19. Chronic or frequent guide bar mount breakage on Jet-Fit guide bars when no accident has occurred.

  • Page 95: Jet-Fit® Guide Bar Mount Conditions

    Guide Bar Troubleshooting 20. Occasional failure of Jet-Fit guide bars when accidents occur. Cause: The guide bar becomes stuck in the cut, or an accident occurs causing the guide bar to become stuck . Symptoms: The force required to dislodge the guide bar approaches the strength of the guide bar holder, during which the guide bar mount breaks .

  • Page 96: Drive Sprockets

    Drive Sprockets Mechanical Timber Harvesting Handbook...
  • Page 97 Mechanical Timber Harvesting Handbook...

  • Page 98: Drive Sprocket Types

    Drive Sprocket Types Drive sprockets transfer power from your machine to your saw chain to drive it around your guide bar . Drive sprockets are the third member of your saw chain-based cutting system . They will wear as a team and should be inspected and maintained as a team .

  • Page 99: Common Drive Shaft Configurations - .404

    .404" Drive-Shaft Configurations Oregon .404" pitch rim sprockets are configured for use with Oregon saw chain. Sprockets are compatible with A, B, and C drive-shaft configurations. Type A and D Type B Ø 1.010" 0.236" 25.85 mm 5.99 mm Ø 0.788" 20.015 mm 2X Ø...

  • Page 100: Drive Sprocket Alignment

    533700 3/4" Pitch Harvester Multi-Purpose Tool 1 . Mount your harvester guide bar on your harvester head . 2 . Using the tool that matches your saw chain pitch, place the Harvester Multi-Purpose tool into the groove of your guide bar and slide it back until it extends to the drive sprocket .

  • Page 101: Drive Sprocket Alignment

    . It may be necessary to use shims to ensure proper alignment of the drive sprocket groove with the guide bar’s groove . • Alignment can be checked using an Oregon Harvester Multi- Purpose tool . Mechanical Timber Harvesting Handbook...

  • Page 102: Troubleshooting Drive Sprockets

    The Drive Sprocket is the third component of your cutting system; regular inspection and maintenance is critical . Damaged, misused, or worn harvester drive sprockets will damage and shorten the life of operation of your entire system . Damaged, misused, or worn harvester drive sprockets cannot be repaired;...

  • Page 103: Hydraulic Pump Information

    Hydraulic Pump Information Definitions Hp = Horsepower eff. = Efficiency RPM = Revolutions per minute psi = Pounds per square inch d = Displacement, GPM = Displacement, cubic inches cubic inches T = Torque Pump Calculations Hp = GPM x psi or Hp = .000583 x GPM x psi 1714 x eff .

  • Page 104: Notes

    Notes Mechanical Timber Harvesting Handbook...
  • Page 105 Notes Harvester Head (Mfg ./Model): Guide Bar Part Number: Saw Chain (Part Number/Size): Drive Sprocket (Pitch/Tooth Count): Mechanical Timber Harvesting Handbook...
  • Page 106 Notes Mechanical Timber Harvesting Handbook...
  • Page 107 This Timber Harvesting Handbook supersedes and replaces all previous Oregon Timber Harvesting Handbooks. Oregon®, HarvesterLok®, Jet-Fit®, Chamfer Chisel™, SpeedMax™, Micro Chisel®, and LubriTec™ are trademarks of Blount, Inc. Blount, Inc. • ©2017...
  • Page 108 OregonProducts.com (800) 223-5168 OregonProductSupport@Blount.com Oregon | Blount, Inc. © Copyright 2017, Blount Inc. ® 4909 SE International Way 575957 • Rev AA • 11/17 Portland, Oregon 97222 USA Printed in USA...

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