Machine Operation; General; Hydraulic System Warm Up; Operating Characteristics And Limitations - JLG 1250AJP Operation & Safety Manual

4.1

GENERAL

This machine is a Mobile Elevating Work Platform (MEWP) used to position personnel,
along with their necessary tools and materials at work locations.
The primary operator control station is in the platform. From this control station, the
operator can drive and steer the machine in both forward and reverse directions. The
operator can raise or lower the main or tower boom or swing the boom to the left or
right. The machine can be driven on a smooth, firm surface within the limits of the
maximum operating slope from an elevated platform position.
Refer to the subsection Steering and Traveling of this manual for specific requirements.
The machine has a Ground Control Station that can override the Platform Control
Station. Ground controls operate all functions except Drive and Steer. Except for
performing inspections and the Function Check, the ground controls are to be used in
an emergency to lower the platform to the ground should the operator in the platform
be unable to do so.
4.2

HYDRAULIC SYSTEM WARM UP

The control system monitors the hydraulic system in extremely cold temperatures and
provides optimal performance by automatically limiting the function speeds of the high
demand functions. The warm up mode automatically shuts off when system oil reaches
allowable temperatures.
While the system is cold and in the warm up mode, the tower lift, main lift, and main
telescope functions are limited to creep speeds and is indicated to the operator by
flashing the creep light on the platform control panel.
Functions being operated when the warm up mode turns off will remain in the creep
speed until the function is re-initiated.
4.3

OPERATING CHARACTERISTICS AND LIMITATIONS

4.3.1 Capacities
The boom can be raised above horizontal with or without any load in platform, if:
1. Machine is positioned on a smooth, firm surface within the limits of the maximum
operating slope.
2. Load is within manufacturer's rated capacity.
3. All machine systems are functioning properly.
4. Machine is as originally equipped from JLG.
1250AJP
SECTION 4

Machine Operation

31222384
55