Manitowoc 14000 Service And Maintenance Manual

Reference Only
Manitowoc Published 09-10-14, Control # 065-24 10-9
14000 SERVICE MANUAL TROUBLESHOOTING
10
PROBLEM 8
A load drum does not operate.
POSSIBLE CAUSES
Load drum brake not releasing; no voltage through control handle to controller; no voltage out of
controller to pump EDC; node controller fault; wiring or switch is damaged.
CHECKS
On drum Diagnostic screen is drum brake disengaged when problem handle is moved in problem direction? Does drum
Diagnostic screen indicate a problem with pump, motor, brake, or pawl?
Yes
No
Does engine load when moving problem handle in either direction?
Is drum park brake switch in correct position?
Yes No
Yes No
Are 24 volts present at brake solenoid when
problem handle is moved?
(See Section 2 - Manual Override Test.)
Yes
No
Is there power after switch?
Move switch to
correct position.
Repair or replace wiring or switch.
Consult dealer/factory.
When moving problem handle fully in both directions, does drum Diagnostic screen
show 100% handle command in raise or lower direction?
Yes No
When moving problem handle fully in both
directions, does drum Diagnostic screen show
100% pump control in each direction?
Yes No
Is voltage at problem handle more
than 0 with handle moved? (See
Section 3 - Diagnostic Screen.)
Yes
No
Is there a system fault when handle is moved?
Correct problem.
Yes No
Consult dealer/factory.
Is pressure at brake more than 300 psi (21
bar)? (See Section 3 - Checking Electrical
Inputs/Outputs.)
Repair or replace brake.
Yes No
Is pressure to brake more than 300 psi
(21 bar)?
(See Section 3 -Diagnostic Screen.)
Readjust source pressure
relief or replace drum brake.
Yes
No
Replace brake valve.
Manually stroke pump. Does pump pressurize?
(See Section 2 - Manual Override Test.)
Are 24 volts present (full speed) at pump EDC with handle
moved fully back?
(See Section 3 -Checking Electrical Inputs/Outputs.)
Yes
No
Yes
No
Replace pump EDC.
Repair or replace wiring or
consult dealer/factory.
Replace control handle.
Isolate pump. Does manually
stroked pump pressurize?
Yes No
Repair or replace
motor.
Repair or replace
pump.
Are 24 volts available to switch.
Yes No
Repair or replace wiring.
Yes No
Consult dealer.
Replace switch.

Manitowoc 14000 Specifications

General

Brand	Manitowoc
Model	14000
Category	Construction Equipment
Language	English