Troy-Bilt 31/2 HP - Manual (Page 46)

MAINTENANCE
TROUBLESHOOTING CHART (continued)
MOWER PROBLEMS (continued)
TROUBLE POSSIBLE PROBLEM SOLUTION
W heels do not rotate when left-hand handlebar lever Is
engaged (squeezed).
Not enough tension on wheel drive cable.
W orn or broken wheel drive belt.
Broken or kinked wheel drive cable.
Disconnected wheel drive engagement spring.
Broken or worn wheel drive engagement spring.
Broken or missing cotter pin on engine PTO pulley.
W heel shaft sprocket bolt missing.
Broken jackshaft chain.
Readjust tension. See W heel Drive Adjustment
(General).
Replace belt.
Replace cable.
Reconnect spring to idler arm/end of wheel drive cable.
Replace spring.
Replace cotter pin.
Replace bolt and nut.
Replace jackshaft chain.
W heels continue to rotate when left-hand handlebar
lever Is released.
Too much tension on wheel drive cable.
Broken or excessively worn idler return spring.
Kinked wheel drive cable.
Readjust tension on wheel drive cable. [See Wheel
Drive Adjustment (General).]
Replace spring.
Replace cable.
Mower pulls to one side while mowing. Unevenly inflated tires. Check tire pressures. Make sure they are inflated to an
equal amount (10-20 PSI).
Excessive noise and/or vibration. Blade guides out of adjustment
Blade section(s) or ledger plate(s) on blade are loose.
Loose weed deflector.
Loose cutter bar mount.
Cracked weed deflector.
Loose channel (on drive arm).
Loose nut on drive arm pivot bolt.
Channel (on drive arm) dry.
W orn drive socket rubber bushing/ cutter bar mount
Frozen or broken convex bearing (on top of flywheel).
Loose frame bolts.
Loose flywheel nut.
Engine speed is set too high.
Flywheel bearing is broken or frozen.
Adjust blade guides.
Use hammer and punch to tighten loose rivets.
Tighten the four weed deflector retaining bolts and the
three weed deflector support bolts.
Tighten the four cutter bar mount retaining nuts & bolts.
Replace weed deflector.
Check channel for looseness. If loose, remove drive
arm, tighten channel, and reinstall drive arm.
Re-torque nut to 100 ft.-lbs.
Lubricate channel with automotive type grease.
Replace drive socket and/or cutter bar mount.
Remove drive arm from mower. Replace bearing.
Check & tighten all bolts.
Re-torque nut to 200 ft.-lbs.
Top engine speed should be 3200 RPM. Have Briggs &
Stratton Service Center adjust speed.
Replace bearing.
Cutter bar does not cut well. Object jammed in cutter bar.
Too little tension on cutter bar drive cable.
Shut off engine. Remove object from cutter bar.
Increase tension on cutter bar drive cable. See “Cutter
Bar Drive Adjustment (General)”.
ELECTRIC START SYSTEM TROUBLESHOOTING
TROUBLE POSSIBLE PROBLEM SOLUTION
Keyswitch does not operate starter. Engine does not turn over well when Engine Ignition Pull starter rope to make sure engine is not seized and
Switch is actuated. that problem is in starting system.
W iring harness loose. Check wiring harness plugs for tightness.
Corroded connections. Disconnect wiring harness plugs. Check for and remove
corrosion.
Discharged battery. Charge battery (with supplied charger) for 10 hours.
Broken wires in wiring harness. Use continuity tester (or test light) to check for broken
wires. Replace wiring harness if wire is broken.
Malfunctioning keyswitch. Use continuity tester (or test light) on terminals on back
of keyswitch to determine if keyswitch is not working.
Malfunctioning starter motor. Take mower to authorized Briggs & Stratton Service
Outlet.
Loose connections on starter motor.
Also refer to “Liquid Lock” on Page 21 of this Manual.
Take mower to authorized Briggs & Stratton Service
Outlet.
If, in fhe course of your troubleshooting, you find that Broken wire in engine recharging circuit. Take mower to an authorized Briggs & Stratton Service
the battery will not charge from engine operation. Center for repairs.
Dead battery. Replace battery.
Malfunctioning engine recharging system. Take mower to an authorized Briggs & Stratton Service
Center for repairs.
Battery charger does not charge battery. Broken battery lead. Replace battery.
Broken battery charger wire. Replace battery charger with new original-type battery
charger.
Malfunctioning battery charger. Replace battery charger with new original-type battery
charger.
Dead battery. Replace battery.
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