Gravely 420RX Operator's Manual page 33

Symptoms
Starter does not work
Steering does not track correctly
Steering play is excessive
Vehicle speed does not reach 25
MPH
Vehicle loses ground speed without
losing engine speed
Probable Causes
Neutral switch is not engaged.
Neutral switch is defective.
Battery power is low.
Battery connections are loose or corroded.
Battery is worn out or defective.
Harness connections are loose.
Harness pin connections are bent.
Harness is defective.
Ignition switch is defective.
Starter is defective.
Improper tire inflation.
Tie rods not adjusted correctly.
Damaged frame steering or suspension parts.
Pinion shaft is improperly attached.
Pinion shaft is loose.
Tie rod ends are loose.
Throttle cable housing is set too close to engine
preventing proper cable movement.
Carburetor is icing up.
Normal condition when climbing grades as the
CVT will downshift automatically allowing the
engine to run in its horsepower band.
Drive belt is wet and slips.
Drive belt is worn.
GB - 33
Suggested Remedies
Adjust neutral switch to be engaged with shift
selector in neutral.
Replace neutral switch.
Recharge battery.
Clean and tighten battery connections.
Replace battery.
Reconnect harness connections.
Straighten harness pins.
Replace harness.
Replace ignition switch.
Replace starter switch.
Inflate all tires to correct tire pressure.
Adjust front tie rods. Front tires should toe in
a total of 0 – 1/8" less at the front than at the
back.
Inspect thoroughly and repair before
operating vehicle.
Realign pinion shaft.
Tighten pinion shaft bolts.
Align and tighten tie rod ends.
Reposition cable housing toward seats until
all cable slack is removed between cable
housing and engine.
Install cold weather kit.
None required.
Rev engine in neutral for one minute.
Replace drive belt.