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User manual Bolens, model 12166-8HP

Manafacture: Bolens
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After the problem, we list possible solutions, along with a reference location if appropriate. If you have a problem not listed here, or find that a solution doesn’t work, contact us for further assistance, or contact your local tiller dealer or an Authorized Engine Service Dealer. A WARNING To help avoid personal injury, stop the engine, wait for all moving parts to come to a full stop, remove the electric start key, disconnect spark plug wire and move the wire away from the spark plug, and let the engine and muffler cool before performing any trouble-shooting checks. 1 Wheels/Tines/PTO Drive Lever: A. Lever does not stay in FORWARD- • Drive belt may be too tight. Raise belt adjustment block a little. See Section 5. • Clutch pawl spring at end of lever may be overstretched. Install new spring. B. Lever hard to shift into REVERSE- • Check reverse disc for wear. See Section 5. • Check adjustment of reverse disc and/or reverse spring and plunger assembly. See Section 5. • Clean and re-lubricate motor mount bars, belt adjustment block and linkages on lever. See Section 5. C. Tiller stays in REVERSE when lever is released- • Lubricate motor mount bars, belt adjustment block and linkages on lever. See Section 5. • Check adjustment of reverse spring and plunger. See Section 5. If problem persists, contact your local authorized dealer or the factory for assistance.. D. Lever sticks in FORWARD- • Lubricate motor mount bars, belt adjustment block, and linkages on lever. See Section 5. If problem continues, contact your local authorized dealer or the factory for assistance. E. Lever hard to shift into FORWARD- • Follow advice for Problem 1-D. Also check for possible bent motor mount bar that could be binding in engine mount holes. 2 Wheel Speed Lever: A. Lever hard to shift, or sticks in FAST or SLOW wheel gear positions- • Lubricate eccentric lever at rear of power unit transmission. See Photo 5-48. If rust is present, use penetrating 61 Troubleshooting oil and work eccentric lever back and forth by hand. • Lubricate linkage that connects Wheel Speed Lever to eccentric lever. Photo 5-48. • Clutch inside transmission may be binding. Disconnect linkage from eccentric lever and work eccentric lever by hand. If difficult or impossible to move, it may be due to a damaged keyway on the wheel shaft. Contact Technical Service Dept. • Lubricate washers and castle nut on pivot of lever. If necessary, remove roll pin and back nut off 1/6th turn. Replace roll pin and test the movement. • Apply grease to zerk fitting (if so equipped) with grease gun until grease appears around washers. Photo 5-48: Check connecting rod, shifting linkage and eccentric lever. B. Lever shifts into FAST wheel gear, but not into SLOW wheel gear- • Connecting rod at end of lever might be backwards, or bent In toward transmission housing and hitting it. Other shifting linkage might be bent. Straighten or replace linkage. See Photo 5-48. • Clutch inside transmission may be binding. See Problem 2-A. C. Lever moves freely, but won’t shift in or out of gear- • Eccentric shifting pin inside transmission may be broken (rare) or worn. Disconnect linkage from eccentric lever and try moving eccentric lever by hand. See Photo 5-48. If lever moves easily, contact the Technical Service Department. 3 Wheels and Tines Won’t Turn: • Review operation of controls. See Sections 3 and 4. • Check condition and adjustment of drive belt and reverse disc. See Section 5. • Mounting bolt for transmission drive pulley may be loose. (See Photo 5-1). If so, drive belt or reverse disc will turn pulley, but pulley won’t turn main drive shaft. • Worm gears that drive wheel and tiller shafts may be worn. 4 Wheels Turn, But Tines Wont •Tines/PTO Clutch Lever must be in ENGAGE position. See Section 3. • Tines/PTO Clutch Lever may need adjustment. • Key for “dog” clutch on tine attachment main drive shaft may be missing, broken. • Worm gears that drive the tine shaft may be worn. • Hardware holding tine holders to tine shaft may be missing or broken. To check, remove holders. See Section 5. • Key for bronze worm gear on tine attachment main drive shaft may be missing or broken. 5 Tines Turn, But Wheels Won’t: • Check operation of Wheel Speed Lever. Refer back to Problem 2. • Hi-Pro key inside wheel clutch may be missing, broken. If so, clutch will not turn wheel shaft. • FAST and SLOW speed wheel gears may be worn. If only one gear is worn, there will only be one wheel speed. • Worm gear that drives pinion shaft and pinion gears may be worn. • FAST and SLOW speed pinion gears may be worn. If only one gear is worn, there will only be one wheel speed. • Drive “dogs” on sides of wheel clutch may be worn or broken. If only one side of clutch is affected, there will only be one wheel speed. 6 Wheels And Tines Turn On Top Of Ground, But Stop Or Hesitate In Soil: • Drive belt may be loose. See Section 5. • Mounting bolt for transmission...