Assessments - 3, GPA: 4.3
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Chain tension is very important. Chains stretch during use. This is especially true during the first few times you use your pruner. Always check chain tension each time you use and refuel your unit. 9 1. Use a screwdriver to move chain around guide bar to ensure kinks do not exist. The chain should rotate freely. ChainAdjustmentToolGuideBar 2.Loosenbarclampnutuntilitisfingertightagainstthebarclamp. BarclampnutAdjustingScrew 3. Turn adjusting screw clockwise until chain solidly contacts bottom of guide bar rail. Then, turn adjusting screw an additional 1/4 turn. Adjusting Screw - --1/4 Turn 4. Using a screwdriver, roll chain around guide bar to ensure all links are in bar groove. 5. Lift up tip of guide bar to check for sag. Release tip of guide bar, then turn adjusting screw 1/4 turn clockwise. Repeat until sag does not exist. 6. While lifting tip of guide bar, tighten bar clamp nut securely with a wrench. 7. Use a screwdriver to move chain around guide bar. 8. If chain does not rotate, it is too tight. Slightly loosen bar clamp nut and loosen chain by turning the adjusting screw 1/4 turn counterclockwise. Retighten bar clamp nut. 9. If chain is too loose, it will sag below the guide bar and needs to be tightened following above procedure. WARNING: DO NOT operate the pruner if the chain is loose. If the pruner is operated with a loose chain, the chain could jump off the guide bar and result in serious injury. CHECK CHAIN SHARPNESS A sharp chain makes wood chips. A dull chain makes a sawdust powder and cuts slowly. See CHAIN SHARPENING in the SERVICE AND ADJUSTMENTS section. BAR MAINTENANCE If your pruner cuts to one side, has to be forced through the cut, or been run with an improper amount of bar lubrication it may be necessary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, ensure ON/OFF switch is in the OFF position, then clean all sawdust from the guide bar and sprocket hole. To maintain guide bar: S Move ON/OFF switch to the OFF position and disconnect spark plug (or disconnect powerhead from power source). S Loosen and remove bar clamp nut and chain brake. Remove bar and chain from pruner. S Clean the oil holes and bar groove after each 5 hours of operation. RemoveSawdustFromGuideBarGrooveOilHoles SBurringofguidebarrailsisanormalprocessofrailwear.Removetheseburrswithaflatfile. SWhenrailtopisuneven,useaflatfiletorestoresquareedgesandsides. File Rail Edges and Sides Square Worn Groove Correct Groove Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your pruner in the repair parts list. LUBRICATION Bar Oil FillCap SSeeGUIDEBARANDCHAINOILundertheOPERATIONsection. 10 SERVICEANDADJUSTMENTSSERVICEANDADJUSTMENTS WARNING: Always stop unit and disconnect spark plug wire (or disconnect powerhead from power source) before performing maintenance, service, or adjustments except for carburetor adjustments. CHAIN SHARPENING Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener. CHAIN REPLACEMENT WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving. It is normal for a new chain to stretch during the first 15 minutes of operation. You should recheck your chain tension frequently and adjust the chain tension as required. See CHAIN TENSION section. Replace the old chain when it becomes worn or damaged. Use only the Low-Kickback replacement chain specified in the repair parts list. TO REPLACE CHAIN: 1. Move ON/OFF switch to the OFF position and disconnect spark plug (or disconnect powerhead from power source). 2. Remove bar clamp nut. 3. Remove bar clamp. 4. Turn adjusting screw by hand counterclockwise until adjusting pin just touches the stop. 5. Slide guide bar behind sprocket until guide bar stops against sprocket. 6. Remove the old chain. 7. Carefully remove new chain from package. Hold chain with the drive links as shown. Cutter Tip of Bar Drivelink CUTTERS MUST FACE IN DIRECTION OF ROTATION Depth Gauge Cutters Drive Links 8. Place chain over sprocket, fitting the drive links in the sprocket. 9. Fit bottom of drive links between the teeth in the sprocket in the nose of the guide bar. 10. Fit chain drive links into bar groove. 11. Pull guide bar forward until chain is snug in guide bar groove. Ensure all drive links are in the bar groove. 12. Now, install bar clamp making sure the adjusting pin is positioned in the lower hole in the guide bar. AdjustingPinLowerHoleGuideBar 13. Install bar clamp nut and finger tighten only. Do not tighten any further at this point. Proceed to the CHAIN ADJUSTMENT section. CHAIN ADJUSTMENT See CHECK CHAIN TENSION in MAINTENANCE section. 11 STORAGESTORAGE WARNING: Perform the following steps after each use: S Allow attachment to cool before s...
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