JLG 600A Operation And Safety Manual page 55

4. Enable Indicator/Footswitch
To operate any function, the footswitch must be
depressed and the function selected within seven sec-
onds. The enable indicator shows that the controls are
enabled. If a function is not selected within seven sec-
onds, or if a seven second lapse between ending one
function and beginning the next function, the enable
light will go out and the footswitch must be released and
depressed again to enable the controls.
Releasing the footswitch removes power from all con-
trols and applies the drive brakes.
TO AVOID SERIOUS INJURY, DO NOT REMOVE, MODIFY OR DISABLE
THE FOOTSWITCH BY BLOCKING OR ANY OTHER MEANS.
FOOTSWITCH MUST BE ADJUSTED IF FUNCTIONS ACTIVATE WHEN
SWITCH ONLY OPERATES WITHIN LAST 1/4" (6.3 MM) OF TRAVEL, TOP
OR BOTTOM.
3121204
SECTION 3 - MACHINE CONTROLS AND INDICATORS
5. Glow Plug Indicator
When illuminated the glow plugs are operating. After
turning on ignition, wait until light goes out before crank-
ing engine.
6. Low Fuel Indicator (Yellow)
Indicates the fuel tank is 1/8 full or less. When the light
first turns on, there are approximately four usable gal-
lons of fuel remaining.
7. Malfunction Indicator
On all machines prior to S/N 48907 and machines with a
Deutz engine prior to S/N 64249, the light turns on and
an alarm sounds when machine's power system
requires immediate service. Any of the following condi-
tions will turn on light and alarm: low engine oil pres-
sure, high engine coolant temperature, clogged engine
air filter, low alternator output, clogged hydraulic oil
return filter, or clogged charge pump filter.
On machines with Ford engines from S/N 48907 to S/N
64249, the light indicates that the Engine Control Sys-
tem has detected a malfunction and a Diagnostic Trou-
ble Code has been set in the system memory.
– JLG Lift – 3-19