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Identify part on crane (need help)

B

BrianS

New Member
Joined
Oct 2, 2013
Messages
3
Location
NY
Sorry if this is a basic question but I'm trying to figure out what this part is in the boom section of this crane and what is it's purpose. The crane is a Liebherr HS855 HD. It's a duty cycle lattice boom crawler crane so it's used for clam/dragline type work. Here's a photo and one clipped from the sales brochure.

what01_zps09c41fc8.jpg
what02_zps2200341f.jpg

Thanks in advance.
Brian
 
F

FMD

Well-Known Member
Joined
Jul 26, 2013
Messages
83
Location
somewhere
BrianS said:
Sorry if this is a basic question but I'm trying to figure out what this part is in the boom section of this crane and what is it's purpose. The crane is a Liebherr HS855 HD. It's a duty cycle lattice boom crawler crane so it's used for clam/dragline type work. Here's a photo and one clipped from the sales brochure.

View attachment 107676
View attachment 107675

Thanks in advance.
Brian
Click to expand...


Looks like an aux jib..........used to make rigging easier.
 
Nige

Nige

Senior Member
Joined
Jun 22, 2011
Messages
29,364
Location
G..G..G..Granville.........!! Fetch your cloth.
Have you got a photo taken from the RH side of the boom and a bit closer..? One of the first things that crossed my mind when you said grab (clamshell) service was the attachment for the tagline that prevents the bucket spinning, well it does on a single-rope grab anyway.
 
D

dbl612

Well-Known Member
Joined
Jul 6, 2012
Messages
111
Location
torrington, ct.
Occupation
crane operator
usually the tagline winder (rudomatic) goes about 40-50' above the boom foot pin. this device is way to low for that function.
 
willie59

willie59

Administrator
Joined
Dec 21, 2008
Messages
13,396
Location
Knoxville TN
Occupation
Service Manager
Yep, coiled up anti two-block wire. If you look just below it to the left (about 7:00 of the red circle) you can see the modular plug connector that connects the wire to termination point.
 
B

BrianS

New Member
Joined
Oct 2, 2013
Messages
3
Location
NY
Thanks for all the replies. So basically this just holds wire for a sensor? I read up on anti two-block and I understand it's purpose but not really how they go about it doing it.
 
D

Dualie

Senior Member
Joined
Feb 23, 2007
Messages
1,371
Location
Nor Cal
A2B is just a weight hanging from a lever sensor. when the block comes up and makes contact with the hanging weight it trips the switch. The switch in turn cuts out the hydraulic functions that would make the condition worse. AKA boom out, and winch up.
 
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