Manitowoc GROVE GMK 6400 User Manual

Malfunctions during crane operation
14.4 Troubleshooting
14 - 16 3 112 993 en Operating manual GMK 6400
12.07.2013
14.4.6 Malfunctions in the telescoping mechanism
Malfunction Cause Solution
Telescoping mechanism not
working or malfunctioning
Telescoping mechanism off,
lamp in button lights up dimly
à Switching on the telescoping
mechanism
, p. 11 - 76
Dead man's switch system
not actuated.
Press dead man's switch
Emergency stop switch on
à Resetting the emergency stop
switch
, p. 10 - 18
Fuses F1/1, F1/2, F1/7,
F3/1, F3/2, F3/5, F3/6 blown
Replace blown fuse;
à p. 14 - 5
Fuse blown on circuit board Replace blown fuse;
à p. 14 - 7
Control unit faulty, error mes-
sage is displayed
Acknowledge error message
once;
à p. 14 - 32 – if error
persists, notify Manitowoc
Crane Care
Fuse F3/7 blown Replace blown fuse;
à p. 14 - 9
Telescopic section and tele-
scoping cylinder locking/
unlocking function not work-
ing
Faulty valve Note the error code
à p. 14 - 32 and notify
Manitowoc Crane Care
Extending function not
working
Fuse F3/3 blown Replace blown fuse;
à p. 14 - 9
RCL shutdown, lamp
+ lights
up
Leave the shutdown range;
à p. 11 - 37
Lifting limit switch
approached, lamp
# lights up
Leave the shutdown range,
retract boom
Retracting function not
working
Insufficient lubrication Lubricate main boom;
à Maintenance manual
Main boom is not steep
enough
Leave the shutdown range
and raise the boom
Telescopic section cannot be
operated by moving the con-
trol lever
Telescopic section locked
à Unlocking the telescopic sec-
tion
, p. 11 - 86
Telescoping cylinder
unlocked
à Locking the telescoping
cylinder
, p. 11 - 85
Telescopic section/telescop-
ing cylinder locking function
not working
Fault in hydraulics/electrical
system
Note the error codes
à p. 14 - 17, à p. 14 - 31
and notify Manitowoc Crane
Care

Manitowoc GROVE GMK 6400 Specifications

General

Brand	Manitowoc
Model	GROVE GMK 6400
Category	Construction Equipment
Language	English