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6. TROWELS TURN, ENGINE AT IDLE
• Idle too fast
• Belt too tight
• Clutch seized
• Pulley out of alignment
7. TROWELS BLADES WEARING UNEVENLY
• Spider plate seized
• Arms bent
• Adjusting screws (carriage bolts) incorrectly set
• Floating disc not evenly attached to the blades
8. MACHINE JUMPS ON FLOOR
• Concrete hardened on bottom of spider plate
• Trowels unevenly worn/bent
• Spider plate seized
• Spider plate loose
• Trowel arms bent
• Adjusting screws (carriage bolts) incorrectly set
• Main shaft bent
9. PITCH CONTROLS WILL NOT OPERATE BLADES
• Cable broken or out of adjustment
• Pressure plate assembly contaminated with concrete debris
• Slot screw missing (under-side of handle)
• Spider plate seized
• Pressure plate and/or yoke arm broken or badly worn
• Hand crank adjuster malfunctioning
10. BELT WEARING RAPIDLY
• Belt is too tight
• Pulley out of alignment
• Wrong belt/defective belt
• Clutch sticking
• Gearbox seizing
11. OIL LEAKS
a. Top of gearbox
• Gearbox seal warn
• Engine leaks
• Too much oil in gearbox
b. At main shaft or countershaft
• Shaft and/or seal worn
• Retaining screw(s) loose
12. TROWEL BLADES WILL NOT TURN
• Yoke arm broken
• Key sheared
• Gearbox malfunction
Diagram - 36
1. Walk-behind power trowel assembly