JLG M450 ANSI Service Manual - Manual (Page 110)

SECTION 3 - CHASSIS & TURNTABLE
3-70 – JLG Lift – 3121127
APU Engine Start Battery Boosting
Always connect the POSITIVE (+) of the booster battery
to the POSITIVE (+) of the APU start battery, and the
NEGATIVE (-) of the booster battery to the ground of the
engine block.
WARNINGS:
ALWAYS SHIELD YOUR EYES AND AVOID LEANING OVER THE
BATTERY WHENEVER POSSIBLE.
DO NOT ALLOW BATTERY ACID TO CONTACT EYES OR SKIN.
FLUSH ANY CONTACTED AREA WITH WATER IMMEDIATELY.
SEEK MEDICAL ATTENTION IF IRRITATION PERSISTS.
STARTING BATTERIES GENERATE EXPLOSIVE GASES. KEEP
SPARKS, FLAME AND LIGHTED CIGARETTES AWAY FROM BAT-
TERIES.
IMPROPER USE OF A BOOSTER BATTERY TO START AN APU MAY
CAUSE AN EXPLOSION.
DO NOT ATTEMPT TO JUMP START AN APU WITH A LOW ACID
LEVEL IN THE BATTERY.
THE VOLTAGE OF THE BOOSTER BATTERY MUST BE RATED AT
12V. THE AMP-HOUR CAPACITY OF THE BOOSTER BATTERY
MUST NOT BE LOWER OR SUBSTANTIALLY HIGHER THAN THAT
OF THE DISCHARGED BATTERY. USE OF BATTERIES OF DIFFER-
ENT VOLTAGE OR SUBSTANTIALLY DIFFERENT AMP-HOUR RAT-
ING MAY CAUSE AN EXPLOSION OR PERSONAL INJURY.
APPLYING A HIGHER VOLTAGE WHILE BOOSTING WILL ALSO
CAUSE DAMAGE TO SENSITIVE ELECTRONIC COMPONENTS.
A CHARGING SYSTEM (BATTERY CHARGER OR BATTERY
CHARGING ALTERNATOR) MUST NEVER BE ENERGIZED WHILE
BOOSTING. DAMAGE TO SENSITIVE ELECTRONIC COMPONENTS
WILL RESULT.
THE MAIN BATTERY OF THE LIFT MUST NEVER BE USED TO
BOOST THE APU. DAMAGE TO SENSITIVE ELECTRONIC COMPO-
NENTS WILL RESULT.
2-2 Engine Starting System fault Check engine start battery charging system for current output.
Check for failed engine start battery.
2-4 Loss Of Voltage Sense
Table 3-11. Troubleshooting
Flash Code Problem Solution