❑
Engine Shut-Off Alarm
The engine shut-off alarm comes on when the
engine is overheating or the oil pressure is low.
When the alarm sounds you should immediately
lower the platform completely down then turn the
engine off until the condition that caused the
alarm has been corrected. See “Automatic
Shut-Offs and Circuit Breakers” chapter 5 for
more information.
If the engine has automatically shut off, and
will not restart, go to the “Emergency
Operation” chapter 9, and use emergency
operation procedures to lower the platform.
❑
Alternator Not Charging Alarm
DO NOT continue to operate the ATB 42/50
while the alternator alarm sounds. Without
charging current, the battery will discharge to
the point it cannot operate Emergency Power.
If the engine alternator quits (usually because of
a broken fan belt), a continuous tone alarm will
automatically sound. The alarm warns you that
the battery is discharging.
Check the alternator drive belt to see if it is
broken or loose before you try to restart the
engine. If the engine will not restart, refer the
problem to a qualified service technician.
❑
Axle Unlocked Alarm
The front axle of the ATB 42/50 pivots so that all
four wheels remain on the ground when the
machine is driven with the main boom elevated
less than 5° and the riser booms down. This
improves traction for 4-wheel drive machines and
reduces the ground pressure for all machines
while they are driven between work sites.
The main boom (more than 5°) and/or riser
booms should only be raised when the ATB 42/50
is on a smooth level surface. When the main
boom is raised more than 5° or the riser booms
are raised slightly the front axle is automatically
forced to lock into position parallel to the rear axle
so that the bottoms of all four tires are in the
same plane. This maximizes stability of the
chassis while the booms are up.
If the front axle is not locked parallel to the rear
axle when the main boom is raised more than 5°
or riser booms are raised, the TIP OVER
HAZARD light will come on and the “axle
unlocked” alarm will sound.
DO NOT raise the main boom or riser booms
while the “axle unlocked” alarm is sounding.
When the alarm sounds you should
IMMEDIATELY lower the booms completely
down. Drive to a slightly different position, then
raise the booms again. If the alarm comes on
again, take the machine out of service
immediately and refer the problem to a
qualified service technician.
page 2 - 2
ATB 42/50 – 0161987
2. Safety Devices
CAUTION
DANGER
CAUTION
