Poulan 1992-05 User Manual - Page 17

A WARNING The Depth Gauge Tool is required to insure proper depth gauge. Filing the depth gauge too deep will increase the chance of kickback which can result in serious injury. b. CHAIN REPLACEMENT 1.) Use only the Low-Kickback replacement chain specified for your saw in the "Specifications" section. 2.) Replace the chain when cutters or links break. 3.) See a qualified service dealer to replace or sharpen your chain. 4.) Always have a worn sprocket replaced by a qualified service dealer when installing a new chain to avoid excessive wear to the chain. 2. GUIDE BAR MAINTENANCE • Conditions which can require guide bar maintenance: - - saw cuts to one side. - - saw has to be forced through a cut. - inadequate supply of oil to bar and chain. • Check the condition of the guide bar each time the chain is sharpened. A worn guide bar will damage the chain and make cutting more difficult. • Replace the guide bar when: - the inside groove of guide bar rails is worn. - the guide bar is bent or cracked. See Figure 32 . • Use onlythe replacement Reduced-Kickback Guide Bar specified for your saw in the "Specification" section. a. Remove the guide bar to service. B. SPARK ARRESTOR • Carbon deposits build up on the spark arrestoras thesawis used and must be removed to avoid creating a fire hazard or causing engine damage. • Replace the spark arrestor if breaks occur. • Keep the spark arrestor clean at all times. Clean: --as required. --at least once for each 25-30 hours of operation. Items required: wire brush, 3/8" wrench 1. Disconnect the spark plug wire. 2. Remove the muffler cover screw. Remove the muffler cover. Figure 33 . 3. Remove the spark arrestor screen. Figure 33 4. Clean the screen with a wire brush or replace if breaks are found. 5. Reassemble parts. b. Clean the oil holes at least once after every five hours of operation. c. Remove sawdust from the guide bar groove periodically with a putty knife or a wire. Fig- ure 31. d. Remove burrs by filing the side edges of the guide bar grooves square with a flat file. Fig- ure 32 . e. Restore square edges to an uneven rail top be filing with a flat file. Figure 32 . Hook Angle 025. Too Much Hook Angle y SOqffuaCroerdner C \ .5- Rounded '11k 0 0 Corner Right Way Figure 30 Wrong Way Remove Sawdust From Guide Bar Groove Figure 31 li lt Col ect Guide Bar Groove Worn Grooves Figure 32 File Edges Square Muffler Cover Muffler Screw Cover Baffle Plate N. Spark Arrestor Screen Spacer Baffle Plate Figure 33 READ WARNINGS AND SAFETY INSTRUCTIONS FREQUENTLY - 17 -