JLG 18RS Service Manual - Manual (Page 75)

SECTION 3 - CHASSIS & TURNTABLE
3121284 – JLG Lift – 3-37
3.9 CHASSIS TILT INDICATOR SYSTEM
The Chassis Tilt Indicator System measures the relationship of
turntable angle as compared to level ground. The system uses
a tilt sensor to measure this. The tilt sensor is an integral part of
the ground module and has two settings; 5.0° (depending on
market) and 6.0° degrees. The tilt angle is set by choosing the
desired angle based upon the operator’s regional market.
There are three options for the Chassis Tilt Indicator System;
5.0° + cut-out, 4.0° + cut-out and 3.0° + cut-out.
The tilt angle is used for the purpose of warning the operator
by means of the chassis tilt light in the platform display panel.
When used in conjunction with the Beyond Transport - Drive
Speed Cutback System, the tilt sensor will cause an alarm to
sound, and automatically cut-out boom up, telescope extend,
and drive/steer functions. These commands will be locked out
until the tilt sensor or the transport switch is within the operat-
ing window.
The 6° angle is used for automatically slowing drive speed
when this chassis angle is reached and the boom is in Trans-
port position. When the boom is in Transport Position and the
chassis is at or above 6°, the drive system will automatically
switch into 4WD mode.
The control system responds to indicated angle readings 0.5
degree smaller than the required angles to account for calibra-
tion and sensor variation.
3.10 COLD START SYSTEM
The JLG Control System monitors the engine coolant and
ambient temperature to determine cylinder preheating
requirements. If the coolant temperature is below 65° C when
control power is turned on, the glow plugs will be automati-
cally activated for a period of time based on the ambient tem-
perature up to a maximum of 20 seconds. During this preheat
period, the glow plug indicators on the control consoles will
flash. The operator should wait for the glow plugs to complete
their cycle before cranking the engine.
3.11 ENGINE OPERATING STATES
The Engine Operating State is determined by the Ground
Module. There are four different Engine Operating States
which include;
• Engine Stopped
• Engine Cranking
• Engine Starting
• Engine Running