• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Old John Deere 70 pattern change

M

Mikefromcny

Well-Known Member
Joined
Nov 12, 2009
Messages
192
Location
Upstate NY
Occupation
Mechanic
Does anyone remember if linkage could be swapped around on these? No pilot lines. Wobble sticks to linkage, linkage to control valve, control valve to hardlines that run to the cylinders. Only way I see to do it is to make up longer hoses to switch which Hardline meets which hose. I figured I'd swap some pilot lines around and be done with it! This is probably 80's vintage.
 
MarcusZ1967

MarcusZ1967

Well-Known Member
Joined
Apr 5, 2018
Messages
125
Location
Mrshfld, Missouri
Occupation
Do-All
This is where I fliped a '79 JD690B to "Cat" control.... The Boom and Stick (Crowed?... WTF?).... pulled off the two top to get the bottom two, switched both to the other valve. Now the S-S and B-B are on the same sticks... If you have solid lines, somewhere there are flex lines....

I got the idea of flipping it over from Chris on letsdig18 youtube channel. He just bought a Hitachi.
 

Attachments

  • 20190715_200655.jpg
    20190715_200655.jpg
    844.2 KB · Views: 6
Last edited:
M

Mikefromcny

Well-Known Member
Joined
Nov 12, 2009
Messages
192
Location
Upstate NY
Occupation
Mechanic
I think I've got it figured out. In that video, those are the pilot lines that control the control valve. This machine has linkage to that valve, it can't really be changed unless you start cutting and welding. I'll be changing the only flexible hoses in the system, at the base of the boom.
 
E

excavator

Senior Member
Joined
Oct 16, 2006
Messages
1,448
Location
Pacific North West
MarcusZ1967 said:
This is where I fliped a '79 JD690B to "Cat" control.... The Boom and Stick (Crowed?... WTF?).... pulled off the two top to get the bottom two, switched both to the other valve. Now the S-S and B-B are on the same sticks... If you have solid lines, somewhere there are flex lines....

I got the idea of flipping it over from Chris on letsdig18 youtube channel. He just bought a Hitachi.
Click to expand...
This is a Zaxis series, a totally different machine.
 
GregsHD

GregsHD

Senior Member
Joined
Sep 26, 2014
Messages
557
Location
Mahood Falls, BC
Occupation
Self Employed HD Mechanic
I wouldn't just swap the hoses, the circuit relief valves will have different set pressures for boom and stick. Best to modify the bellcranks/linkage under the cab floor. I've seen it done on an old UH025 which is basically the same machine. There's a YouTube video briefly showing it, I'll find and link it.
 
Last edited:
You must log in or register to reply here.
Top