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Hydraulic lines crossing? Options · View
Gregg
Posted: Sunday, March 14, 2021 10:28:50 PM
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Joined: 8/12/2002
Posts: 761
Location: New York
Hello all,
I have no working experience with excavators but I have noticed that often the rigid hydraulic lines start up the boom and some continue straight all the way to the end of the boom. I see others go up a few feet on one side and cross over existing lines, make a shallow bend and then continue straight up the boom. I am interested in the reason for this.
Thanks.
brian falcone
Posted: Monday, March 15, 2021 12:13:50 AM

Rank: Advanced Member
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Joined: 2/28/2006
Posts: 3,457
Location: rhode island
The reason is the valve bank located behind the boom on an excavator.the lines that cross on the 336 at work anyway are for the stick cylinder. Because the valve for the stick in and out function is located at one side,the line needs to cross the boom so it can get to the other side of the cylinder....same with bucket lines. They have to run down the side of the boom. So at some point one line has to cross to get to the other side. From what I've seen. Most excavator manufacturers do this as it cheaper to move a line than redesign the valve bank.
Gregg
Posted: Monday, March 15, 2021 12:06:47 PM
Rank: Advanced Member
Groups: Member

Joined: 8/12/2002
Posts: 761
Location: New York
brian falcone wrote:
The reason is the valve bank located behind the boom on an excavator.the lines that cross on the 336 at work anyway are for the stick cylinder. Because the valve for the stick in and out function is located at one side,the line needs to cross the boom so it can get to the other side of the cylinder....same with bucket lines. They have to run down the side of the boom. So at some point one line has to cross to get to the other side. From what I've seen. Most excavator manufacturers do this as it cheaper to move a line than redesign the valve bank.

Thanks so much, I appreciate that someone replied....
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