Manitowoc 18000 Service Maintenance Manual

Reference Only
18000 SERIVCE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
Manitowoc Published 12-05-17, Control # 035-23 2-31
2
Pump Pressure Test
See Figure 2-23 and 2-26 for the following procedure.
The pump pressure line of the calibration screen cycles
through the hoist pumps to make sure each pump is capable
of producing 6,000 psi (414 bar).
CAUTION: Only perform this high pressure test when
absolutely necessary and by a qualified service technician.
To perform pump pressure test, proceed as follows:
1. Turn PARK ON for all crane functions (drums, boom
hoist, swing, travel).
2. Start engine. It is normal for yellow operating limits light
to come on during this procedure.
3. Access calibration screen shown below as follows:
a. Select and confirm SETUP mode to activate
calibration program.
b. Turn LIMIT BYPASS switch clockwise and hold.
c. SCROLL UP at least one screen.
d. Continue to scroll up or down until calibration screen
appears.
e. Press bottom of CRANE MODE switch until (*)
appears next to PRESSURE TEST.
f. Increase engine speed to:
- HIGH IDLE, field personnel
- 1,350 rpm, MCC assembly personnel when
checking out a new crane
Engine must be running faster than 750 rpm before
calibration will start.
Calibration will stop if engine speed is decreased
during calibration.
g. Press top end of CRANE MODE switch to
CONFIRM. Testing will start.
h. When testing starts, percent (%) of completion is
displayed on screen.
i. When testing stops, check binary number:
- If 0 appears, all pumps have passed the test.
- If any number other than 0 appears, use Table
2-11 to determine which pumps have failed the
test.
Each pump is assigned a number in the binary
system (power of two). After running the
pressure test, outputs that are ON (failed) for
any pump are added together. To identify the
failed pumps, 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 pumps that failed testing.
Refer to Figure 2-26
to identify the pumps.
j. Troubleshoot the particular system to determine the
cause of the fault.
k. Proceed to next procedure, or exit calibration
screen by pressing bottom of CRANE MODE
switch. Cursor (*) will disappear from screen.
WARNING
High Pressure Hazard!
This test generates maximum pressure in the main
hydraulic circuits. Defective brakes may allow unintended
motion during test. Move the crane to an area where such
motion is not a hazard.
Use a signal person to monitor functions operator cannot
see.
Be prepared to stop engine if unintended motion occurs.
FIGURE 2-26
Binary
No.
Pressure Sender
1Main Hoist 1
2Main Hoist 2
4 Boom Hoist
8 Luffing Hoist
*
PRESSURE SENDER CAL
CONTROL CAL
PUMP PRESSURE TEST
CHARGE PRESSURE
0% 0
Percent
Complete
Binary
Number

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English