
Reference
Only
HYDRAULIC SYSTEM
18000 SERIVCE/MAINTENANCE MANUAL
2-18
Published 12-05-17, Control # 035-23
DISC BRAKE OPERATIONAL TEST
There is no physical way to check the disc brakes for travel,
boom hoist, load drums, and swing. Therefore, an
operational test of each brake must be performed weekly.
shows the brake and brake solenoid valve
locations.
NOTE:
For all pumps except swing, system pressure is
preset at 6,000 psi (413 bar). For swing pump,
system pressure is preset at 5,000 psi (345 bar).
Electrical plugs at brake solenoid valves must be
disconnected to stall crane functions during test.
1.
Start engine and place throttle in low idle — 1,050 rpm.
2.
Select and confirm STANDARD mode.
NOTE:
For load drums, make sure crane is in full power
mode (free-fall OFF) so disc brakes remain
applied.
For swing, set swing torque for 100%.
3.
Disconnect electrical plug for brake being checked
(
).
4.
Place park brake in off position for function being
checked.
5.
being checked – DRUM, BOOM HOIST, SWING, or
TRAVEL.
Monitor s ys tem PRESS (pre ssure) and PUMP
command while moving control handles.
6.
Slowly move handle for function being checked.
Specified system pressure must be reached before 50%
pump command is reached and
brake must not slip
.
7.
Repeat steps 3 - 5 for each function.
8.
Reconnect electrical plugs at all brake solenoid valves at
completion of operational test.
9.
If disc brakes were repaired or replaced, retest brakes
before operating with a load.
HANDLE
PUMP
MOTOR
100%
50%
%
V
PRESS
SPEED
BRAKE
DOS
6000 psi
rpm
1
0
DRUM 2
Pump
Command
System
Pressure
0 = Brake
Applied
FIGURE 2-15
CAUTION
Overheating Hazard!
Do not hold any function on stall for more than 5 seconds.
Dama ge from ove rh eating can oc cur to s ystem
components.
WARNING
Falling Load/Moving Crane Hazard!
If a disc brake slips when operational test is performed,
repair or replace it before placing crane back into service.
Loads could fall or crane could move if brakes are not
operating properly.
Refer to gear box manufacturer’s manual for disc brake
repair instructions.
Содержание 18000
Страница 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 18000 ...
Страница 2: ...R e f e r e n c e O n l y ...
Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 210: ...R e f e r e n c e O n l y NOTES SKETCHES AND PHOTOGRAPHS ...
Страница 315: ...R e f e r e n c e O n l y ...
Страница 316: ...R e f e r e n c e O n l y ...