Reference
Only
HYDRAULIC SYSTEM
999 SERVICE/MAINTENANCE MANUAL
2-12
Published 05-16-17, Control # 233-03
HYDRAULIC SYSTEM CALIBRATION
To ensure proper operation of the crane functions, the
charge pressures, pressure senders, pump control system,
and pump pressures must be properly calibrated. Calibration
screens are provided to assist in the calibration process.
Accessing Calibration Screens
To access calibration screens, proceed as follows. See
for location of controls.
1.
Select and confirm Setup mode to activate calibration
program.
2.
Turn limit bypass switch clockwise and hold and scroll
up to access diagnostic screens.
3.
Scroll up or down to HYD SYSTEM CHECK in display.
4.
Turn crane mode switch CLOCKWISE to SELECT
position. A cursor (*) will appear next to item being
calibrated.
5.
Scroll up or down to desired calibration screen.
6.
Turn crane mode switch COUNTERCLOCKWISE to
CONFIRM position to start calibration of selected item.
7.
Once selected item is calibrated, repeat steps 3 – 6 for
next item.
8.
Once all items are calibrated, turn crane mode switch
CLOCKWISE to SELECT position to turn off calibration
sequence. Cursor (*) will disappear from screen.
Each calibration item is assigned a number in the binary
system (power of two). After running a calibration check,
outputs that are
on
(active) for any item, are added together.
To identify the active items, find the binary number displayed
on the screen in the first column of
All shaded boxes to the right of the of the number indicate
active items (items that failed calibration). Troubleshoot the
particular system to determine the cause of the fault.
If the number displayed on the screen is 0, there are no
active items (all items passed calibration).
Calibration Procedures
Pressure Sender
The pressure sender screen (
system’s pressure sender null (0) is within 0.65 – 1.35 volts.
The pressure senders must be calibrated at the following
intervals:
•
When a new programmable controller is installed
•
When a new CPU board is installed
•
When a new controller chip is installed
•
When a pump is replaced
•
When a pump control (EDC or PCP) is replaced
•
When a pressure sender is replaced
•
When displayed pressure is not correct
Be aware that if there is any residual pressure in the
system during the calibration process, the display
pressure reading in the cab may not reflect actual
system pressure. See Note on
.
•
Every 6 months
To calibrate the pressure senders, proceed as follows:
1.
Stop engine and turn ignition switch to RUN position.
2.
Access calibration screen (see
).
3.
Stop engine (leave ignition and cab power switches on).
It is normal for yellow operating limits light to come on
during this procedure.
NOTE:
Calibration will not start if engine is running or will
stop if engine is started during calibration.
4.
When calibration starts, percent (%) of completion is
displayed on screen.
5.
Check binary number in screen when calibration is
done:
WARNING
Moving Load Hazard!
With engine running, crane functions (drums, boom hoist,
swing, travel) can operate unexpectedly while system
components are being calibrated.
To prevent crane functions from moving:
•
Turn
park on
for all crane functions.
81017046
Front
Console
Scroll
Up-Down
Rocker
FIGURE 2-8
Display
Limit Bypass
Switch
Crane
Mode
Switch
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...
