SYMPTOM CAUSE REMEDY
Alternator not
charging.
Loose wiring or fault connection. Tighten or replace loose wiring or connector.
Diode at alternator loose or faulty. Tighten connection or replace diode.
Alternator belt loose or broken. Adjust or replace belt.
Alternator malfunctioning. Rebuild or replace alternator.
Noisy alternator.
Alternator bearings.
Remove alternator belt and turn alternator by
hand. If pulley turns rough, repair or replace
alternator.
Worn drive belt. Replace drive belt.
Alternator malfunction. Repair or replace.
Battery uses too much
water.
Battery overcharges.
Check alternator charging rate. Repair or
replace alternator if needed.
Cracked or broken battery case. Replace battery.
Cracked battery case.
Battery hold-down clamps too tight,
loose or missing.
Replace battery and reinstall (or replace) hold-
down clamps properly.
Frozen batteries.
Keep battery fully charged during winter. If
frozen, replace batteries.
Low battery output.
Low water level in battery. Fill with distilled water and charge.
Corroded or loose battery cable
connections.
Clean and tighten all connections.
Broken or loose battery posts. Replace battery.
Loose, slipping alternator belt. Replace belt.
Horn will not sound.
Horn fuse. Replace fuse.
Horn ground connection. Check and repair ground connection.
Horn is inoperable. Replace horn.
Starter does not
function.
Batteries not charged or not longer
operable.
Charge or replace batteries.
Battery connections. Clean and tighten all connections.
Starter motor.
Listen for the starter solenoid click when key is
placed in the start position. If the solenoid clicks,
repair or replace starter motor.
Starter solenoid.
Check for 12 volts at the small solenoid
connections when key is placed in the start
position. If 12 volts are present, replace solenoid.
Starter system circuit breaker.
Check for 12 volts at both sides of the circuit
breaker. If 12 volts is not present on either side,
check wiring. If 12 volts show on only one side,
replace the circuit breaker.
Neutral start switch on pump.
Check for 12 volts on both sides of switch while
the machine is in neutral. If 12 volts are present,
check wiring harness.
Major engine malfunction. See your authorized dealer.
Maintenance
LeeBoy 685D Motor Grader5-48
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