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Rigging work
12.3 Rigging work after driving with a trailer
Operating manual GMK 6400
3 112 993 en
12 - 19
1
2
.0
7.
201
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12.3.3
Switching off boom pre-tensioning
You must switch off the boom pre-tensioning before you raise the main
boom off the trailer.
To switch off boom pre-tensioning, you must bring the valves
I
to
IV
into
the required positions, which will empty the pressure accumulator.
•
Switch off the boom floating position;
The valves
II
and
III
are under the pressure
gauge (
1
).
•
Open valve
II
– the lever (
2
) is vertical
The pressure accumulator is emptied. The
pressure on the pressure gauge (
1
) must drop
to 0 bar (0 psi).
Valve
III
stays closed – the lever (
3
) points
downwards.
S
Danger of the hydraulic oil overheating
Always switch the valve
IV
over (lever in horizontal position) before oper-
ating the crane.
This prevents the pressure in the hydraulic circuit from rising and the
hydraulic oil from exceeding the permissible temperature of 80 °C (176 °F).
Summary of Contents for GROVE GMK 6400
Page 1: ...3 112 993 en 12 07 2013 Operating manual Part 1 Driving ...
Page 9: ...Correction sheet GMK6400 3 302 804 en 7 27 08 2018 Hook tackle Reeving A 1x ...
Page 10: ...27 08 2018 8 3 302 804 en Correction sheet GMK6400 Blank page ...
Page 12: ...06 06 2014 2 3 113 115 en Correction sheet GMK6400 Blank page ...
Page 18: ...22 01 2014 6 3 113 060 en Additional page GMK6400 Blank page ...
Page 26: ...3 112 993 en Operating manual GMK 6400 12 07 2013 Blank page ...
Page 28: ...3 112 993 en Operating manual GMK 6400 12 07 2013 ...
Page 32: ...Overview 1 4 Terms used 1 4 3 112 993 en Operating manual GMK 6400 12 07 2013 1 4 Terms used ...
Page 34: ...Overview 1 4 Terms used 1 6 3 112 993 en Operating manual GMK 6400 12 07 2013 Blank page ...
Page 64: ...3 112 993 en Operating manual GMK 6400 12 07 2013 ...
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Page 383: ...Operating manual GMK 6400 3 112 993 en 12 07 2013 8 8 Index ...
Page 384: ...3 112 993 en Operating manual GMK 6400 12 07 2013 ...
Page 386: ...Index 8 2 3 112 993 en Operating manual GMK 6400 12 07 2013 Blank page ...
Page 404: ...Index 8 20 3 112 993 en Operating manual GMK 6400 12 07 2013 ...
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Page 407: ...3 112 993 en 12 07 2013 Operating manual Part 2 Crane operation ...
Page 415: ...Correction sheet GMK6400 3 302 804 en 7 27 08 2018 Hook tackle Reeving A 1x ...
Page 416: ...27 08 2018 8 3 302 804 en Correction sheet GMK6400 Blank page ...
Page 418: ...06 06 2014 2 3 113 115 en Correction sheet GMK6400 Blank page ...
Page 424: ...22 01 2014 6 3 113 060 en Additional page GMK6400 Blank page ...
Page 432: ...3 112 993 en Operating manual GMK 6400 12 07 2013 Blank page ...
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Page 937: ...Operating manual GMK 6400 3 112 993 en 12 07 2013 15 15 Index ...
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Page 940: ...Index 15 2 3 112 993 en Operating manual GMK 6400 12 07 2013 Blank page ...
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