JLG 660SJ Operator Manual - Manual (Page 44)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-8 – JLG Lift – 3121205
8. Platform Overload (If equipped)
Indicates the platform has been overloaded.
9. Hydraulic Oil Filter Indicator (Prior to S/N 84827).
Indicates the return oil filter is too restrictive and in the
bypass mode and needs to be replaced.
10. Transmission Pump Oil Filter Indicator (Prior to
S/N 84827)
Indicates that charge pump filter is too restrictive and
needs to be replaced. This indicator has an integral tem-
perature sensor (70° F [21° C].) so that false signals are
not generated when the hydraulic oil is below normal
operating temperature.
11. Engine Air Filter Indicator (Prior to S/N 84827)
Indicates that the air filter is too restrictive and needs to
be replaced.
12. EFI System Test Button (Ford Engines S/N 48907 to S/N
61927 - refer to ADE System Identification page at the
front of the book)
By pushing and holding the system test button on the
side of the ground control box, the Diagnostic Trouble
Codes will be displayed on the Malfunction Indicator
Light. Refer to the Service Manual for instructions con-
cerning the trouble codes and trouble code retrieval.
13. Drive and Steer Disable Indicator (If equipped)
Indicates the Drive and Steer Disable function has been
activated.
Figure 3-4. Malfunction Indicator Light and Test Button