Guide Bars – Troubleshooting
Sprocket Nose Bar Problems
Chipping at nose connection (replaceable nose)
Section broken out of sprocket
Cause Loose chain tension. Continual pressure in this area. Heavy limbing at this point Result Chipping at connection of both body and nose assembly Solution Replace nose assembly and dress rail of bar and nose to match
Cause Irregular operating condition which forced drive link sideways. Throwing the chain when limbing. Chain tension run too loose Result Open nose. Broken sprocket. Bearings fall out. One or two broken teeth Solution Replace bar nose assembly
3
Basic Guide Bar Maintenance Tasks
Chain Tension Inspect before use and after every hour of use
File Bar Edge File bar edge to 90° weekly or use Bar Rail Dresser #111439
Bar Nose Grease Turn nose sprocket while pump- ing grease until whole sprocket has new grease. Do not push dirt into hole
Bar Tip Clearance On sprocket nose bars, check for clearance around the bar tip between top of rails and the bottom of cutters or tie straps weekly. Replace nose sprockets before cutters or tie straps contact the bar rails
Bar Cleaning Clean bar channel, grease hole, and oil hole daily
Chain Lean With chain on the bar, hold a straight- edge against the bar body and against a cutter side plate. A good groove will hold the chain straight, leaving a small gap between the straight edge and bar body. A worn groove will let the chain lean until straightedge is flush with bar body. Replace bar if groove is worn. Check weekly
Chain and Bar Oil Inspect before use and after every hour of use
FOR 187
Guide Bars – Troubleshooting
Made with FlippingBook - professional solution for displaying marketing and sales documents online