Section 4
MAINTENANCE
4-58
785 Motor Grader
TROUBLESHOOTNG CHARTS
ELECTRICAL SYSTEM
SYMPTOM CAUSE REMEDY
Starter Solenoid Chatters Poor connections at battery or starter Clean connections.
Defective start solenoid See your authorized dealer.
Batteries discharged Recharge or replace batteries.
Excessive Noise When Cranking Hydraulic pump or pump drive Repair. See our authorized dealer.
Major engine malfunction Repair. See your authorized dealer.
Battery Uses Too Much Water Battery being overcharged If one battery is low on charge, the
other battery will be overcharged.
Recharge low battery separately.
Replace both batteries if one fails.
High ambient temperature Refill with distilled water.
Faulty regulator See your authorized dealer.
Cracked Battery Case Frozen battery Keep batteries fully charged during
cold weather. Replace both batteries.
Battery hold down clamp too tight, Install new batteries. Install hold
too loose, or missing down clamps correctly.
Low Battery Output Low water level Refill with distilled water. Recharge
batteries separately.
Corroded or loose battery cable ends Clean and tighten cable and clamps.
Recharge batteries separately.
Loose fan/alternator belt or worn Belt is slipping. Adjust or replace belt.
pulleys Replace pulleys if needed.
Low alternator output Inspect charging system and repair.
See your authorized dealer.
High Charging System Voltage Alternator or regulator malfunction See your authorized dealer.
(Batteries Hot or Boiling)
Noisy Alternator Bearings in alternator Remove alternator belt. Turn pulley
by hand. If any roughness is felt,
replace bearings.
Horn Will Not Sound Horn fuse Replace fuse.
Poor ground connection Clean connector and frame.
Broken wire Replace wire.
Horn faulty Replace horn.
Front Wiper Will Not Operate at Wiper fuse Replace fuse.
Wiper switch Replace switch.
Wiper motor Replace motor.
Front Wiper Operates in One Open wire Repair wire.
Wiper motor Replace motor.
the Engine
any Switch Position
Position Only
Courtesy of Machine.Market
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