JLG 400SJ Operation And Safety Manual page 43

7. Glow Plug Wait Indicator. (Diesel)
Indicates the glow plugs are on. The glow plugs are
automatically turned on with the ignition circuit and
remain on for approximately seven seconds. Start the
engine only after the light goes out.
8. Hydraulic Filter Bypass Indicator.
Indicates that the return oil filter is too restrictive and
needs to be replaced.
9. Transmission Pump Oil Filter Indicator.
Indicates that charge pump filter is too restrictive and
needs to be replaced. This indicator has an integral
temperature sensor (70 degrees F.) so that false sig-
nals are not generated when the hydraulic oil is below
normal operating temperature.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
10. Engine Air Filter Indicator.
Indicates the air filter is too restrictive and needs to be
replaced.
11. Platform Overload (CE Only)
Indicates the platform has been overloaded.
12. Drive and Steer Disable Indicator (If equipped)
Indicates the Drive and Steer Disable function has been
activated.
– JLG Lift – 3-9