JLG 500RTS Operator Manual - Manual (Page 29)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3120828 – JLG Lift – 3-5
9. PQ Controller - The PQ Controller performs three
functions: Drive, Steer and Drive Speed. On all
machines built before serial number 0200058922,
tilting the controller in the direction you want to go
(forward or reverse) activates drive in that direction.
The thumb-operated steer switch on top of the con-
troller handle activates the steer wheels in the direc-
tion it is moved. If machine is equipped with four
wheel steer, this switch operates only the front steer
wheels. On all machines built after, and including,
serial number 0200058922 there is a red trigger
switch on the front of the controller. This switch must
be depressed and held in order to drive the
machine.
10. Auxiliary Power (If Equipped) - A toggle type auxil-
iary power control switch energizes the electrically-
operated hydraulic pump, when actuated. Switch
must be held ON for the duration of auxiliary pump
use.
The auxiliary power pump functions to provide sufficient
oil flow to operate the Traversing Platform Extensions
should the main pump or engine fail during operation.
It should be noted that the functions will operate at a
slower than normal rate because of the lower GPM deliv-
ered.
NOTE: Auxiliary power pump only operates the Traversing
Platform Extensions.
11. Platform Traversing Switch (If Equipped) - This is
a double throw, momentary contact toggle-type
switch which permits the operator to hydraulically
extend and retract the platforms as needed for “up
and over” work access.
12. Platform Traversing Select Switch (If Equipped) -
In order to select the platform to traverse there is a
full throw, momentary contact toggle-type platform
traversing select switch, that works in conjunction
with the platform traversing switch to permit the
operator to hydraulically extend and retract the plat-
forms as needed for “up and over” work access.
13. Travel Warning Horn - A push-button type horn
switch supplies electrical power to an audible warn-
ing device when pressed.
14. Choke (If Equipped) - A push-button type switch
supplies power, when depressed, to the choke sole-
noid for cold start operations.
15. Leveling Jacks (If Equipped) - The four momentary
contact type toggle switches correspond to the four
leveling jacks, one at each corner of the machine.
BE AWARE OF OTHER PERSONNEL AND EQUIPMENT WHEN
EXTENDING OR RETRACTING LEVELING JACKS.
16. Engine Distress Light (Gasoline Engine) - The
engine distress light is connected to a sensor on the
engine that detects when coolant temperature rises
above a preset level, illuminating the warning light.
17. Engine Distress Light (Diesel Engine) - The
engine distress light is connected to a sensor on the
engine that detects when oil pressure falls below a
preset level, illuminating the warning light