JLG X20JP - X600AJ Service Manual - Manual (Page 116)

SECTION 3 - CHASSIS & TURNTABLE
3-92 – JLG Lift – 3121623
Malfunction Indication Possible cause Remedial action
Battery out-
put is too
low.
Long-term
charging
rate is
insufficient.
Voltage drops
severely when a
load is applied.
Terminal voltage
drops to 7 V nom-
inal voltage (12 V
circuit) even shortly
after recharging.
Battery is flat (dis-
charged). Recharge battery.
Charging voltage is too
low: voltage regulator is
defective. Renew the voltage
regulator.
Connecting terminals
loose or oxidised. Clean connecting
ter minals, apply acid-
resistant grease, tighten
terminal clips.
Battery capacity too low
(too many consumers). Install a larger battery.
Battery is exhausted; ac-
tive material has failed. Renew the battery.
Battery is “sulphatising”
(white deposit on cell
plates). Recharge the battery at
low current for app.
50 hours, or renew the
battery.
Acid level too low. Add distilled water.
Fault at generator,
voltage regulator or
cable connections. Repair or renew the
generator and voltage
regulator, make sure
that all line connections
are tight.
Too many consumers
connected to the circuit,
or generator is too small. Choose more suitable
battery - generator
ratings.
Battery discharged be-
cause of impurities in
the acid.. Renew the battery.