
Reference
Only
TROUBLESHOOTING
18000 SERIVCE/MAINTENANCE MANUAL
10-22
Published 12-05-17, Control # 035-23
Problem 20
No mast hoist (drum 5) operation.
POSSIBLE CAUSES
Mast hoist drum brake is not releasing; Mast hoist pawl not released or hung up; No voltage through control
handle to controller; No voltage out of controller to pump EDC; Node fault; Wiring or switch is faulty.
CHECKS
Check drum brake signal and pressure; Check drum handle command in problem direction; Check computer signal to
brake solenoid, pump EDC and motor PCP; Check pump and motor pressure; Check DOS items on DRUM screen.
Yes
No
Engine loads when moving problem handle in either direction?
Yes
No
Consult dealer/factory.
Move switch
to off position.
Is 24 volts present at brake solenoid W63-D
when problem handle is moved? (See Section 3 -
Checking Electrical Inputs/Outputs).
Yes
No
Repair or replace wiring or switch.
Consult dealer/factory.
When moving handle fully in both directions, does DRUM 5 screen
approach 100% handle control in each direction?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
When moving handle fully in both
directions, does DRUM 5 screen approach
100% pump control command for pump?
Is voltage at handle more than 0
with handle moved?
Is pressure at brake and brake valve
300 psi (21 bar) or more?
Consult dealer/factory.
Correct problem.
Is there an operating or system fault?
Repair or replace brake
or brake valve.
Replace damaged system
brake valve block at motor.
Is there only partial charge pressure
at drum brake?
Set charge pump
relief pressure.
Replace pump EDC.
Manually stroke pump. (See Section 2 - Manual Override Tests).
Does pump pressurize?
Is 0.1 to 2.0 volts present at pump EDC?
Repair or replace wiring or
consult dealer/factory.
Isolate pump. Does manually stroked
pump pressurize?
Repair or replace
motor.
Repair or replace
pump.
Consult factory/dealer.
Yes
No
Yes
No
Is there 24 volts to brake valve or coil?
Repair or replace wiring.
Is 1 displayed after brake on drum screen?
Yes
No
Is 24 volts available to switch?
Repair or replace wiring.
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 ...