“4069RT” Service and Parts ManualMarch 2014
Page 2-20
GP400 CONTROL MODULE SETUP
Tilt Sensor Calibration
Correctly performing the following procedure will ensure that your machine will continue to
auto-level correctly and operate safely.
The Tilt Sensor is located within the GP400 Control Module. It is used by the control sys-
tem to monitor machine level status, and is used on machines equipped with outriggers for
auto-leveling. Correctly performing the Tilt Sensor Calibration will ensure that the machine
will operate safely and that the outriggers (if equipped) will continue to auto-deploy cor-
rectly.
1. Park machine on a flat level surface. Using a spirit level or framer’s level, check that
the machine is absolutely level, both fore-and-aft and side-to-side.
2. Check the tire pressure (see Specifications in the Introduction section), and check
that the tires are in good condition. If the machine is equipped with foam-filled tires,
be sure that all tires are in good condition and that the tires are all the same size.
3. Open the lower control box and plug the EZ-cal into plug J-9 (4-pin connector) on the
GP400. The display should light up and read "HELP - PRESS ENTER.
a. Press the right arrow to access "ACCESS LEVEL 3", press ENTER.
• The display reads CODE 0000 with the cursor flashing.
b. Press the Up and Right arrows to enter code 1775, Press Enter
• Display reads "ACCESS LEVEL 2"
c. Right arrow to SETUPS, Press Enter
• Display reads ‘CHANGE DEFAULTS"
d. Right arrow to TILT SETUPS, Press Enter
• Display reads "CALIBRATE LEVEL".
e. Press Enter
• Display reads "CALIBRATE LEVEL YES: ENTER NO: ESC"
f. Press Enter
• Display reads "CALIBRATE LEVEL YES: ENTER NO: ESC" plus has actual tilt percentages.
g. Press Enter again.
• The percentage numbers should be 0.0 - 0.0 (or very close).
h. Level calibration is complete. Unplug the EZ-Cal or press ESC ESC ESC.
Height Calibration
Height calibration must be performed if the GP400 is replaced.
Skip this procedure if your machine is equipped with the optional
Overload Sensing System.
For this procedure it is not necessary to place any load in the platform.
1. Drive machine to a flat level surface, in area where it can reach full elevation.
2. Turn selector switch to Base controls.
3. Plug EZ-Cal into connector P9 on GP400 Control Module. EZ-Cal display reads
HELP: PRESS ENTER
4. Press right arrow to ACCESS LEVEL 3, Press Enter.
• Display reads CODE 0000
5. Press Up and Right Arrow to enter code 1775. Press Enter.
• Display reads ACCESS LEVEL 2.
6. Press Right Arrow to SETUPS, Press Enter.
• Display reads CHANGE DEFAULTS
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