Manitowoc 18000, Service Maintenance Manual, Page: 123 / 316

Reference
Only
18000 SERIVCE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
Manitowoc
Published 12-05-17, Control # 035-23
2-29
2
d. Continue to scroll up or down until calibration screen
appears.
e. Press bottom of CRANE MODE switch until (*)
appears next to PRESSURE SENDER CAL.
f. Then press top end of CRANE MODE switch to
CONFIRM. Calibration will start.
g. When calibration starts, percent (%) of completion is
displayed on screen.
h. When calibration stops, check bank 1 and bank 2
binary numbers:
- If 0 appears, all pressure senders have passed
calibration.
- If any number other than 0 appears in either
bank, use
Table 2-11 to determine which
senders have failed calibration.
- Each pressure sender is assigned a number in
the binary system (power of two). After running
the calibration procedure, outputs that are ON
(failed) for any sender are added together. To
identify the failed senders, find the binary
number displayed on the screen in the first
column of
Table 2-11 . All shaded boxes to the
right of the number indicate senders that failed
calibration.
- Refer to Figure 2-24 to identify the pressure
senders.
i. Troubleshoot the particular system to determine the
cause of the fault.
NOTE: The cause of a failed calibration or faulty display
pressure reading in the cab may not be the
pressure sender. The cause of the fault could be
trapped air or hydraulic pressure in the system.
Before replacing a pressure sender, do the
following:
• Perform pressure sender calibration steps.
• Attach an accurate hydraulic pressure gauge
to the quick-coupler at the suspect pressure
transducer.
• If pressure appears on the gauge, bleed the
corresponding system so the gauge reads
zero pressure.
• Repeat calibration steps and check pressure
on the display in the cab with the engine
running at idle — the display reading and the
gauge reading should be the same.
• Before replacing a pressure sender, check the
signal voltage at the sender. It should be 1.0
volt against ground at 0 psi.
j. Proceed to next procedure, or exit calibration
screen by pressing bottom of CRANE MODE
switch. Cursor (*) will disappear from screen.