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Cat E70B Hyd Thumb Install

dieseldog5.9

dieseldog5.9

Senior Member
Joined
Aug 11, 2014
Messages
614
Location
New Hampshire
Old trusty Cat E70B has a manual thumb, would like to make it a hydraulic thumb looking for information to plumb into the valve bank on this machine if it is possible.

SN 7YF01328
 
bindian

bindian

Well-Known Member
Joined
Aug 31, 2009
Messages
242
Location
Willis, Texas
Occupation
Aircraft Mechanic
If it is like my mid 80s E70, that would need major replumbing at the valve bank. When I plumbed my hyd. thrumb, I installed an electric over hyd. diverter valve and plumbed the bucket lines to it. Now when I want to close the thumb, I just push the button my right control stick and move the control stick to close the bucket.
hugs, Brandi
 
uffex

uffex

Senior Member
Joined
Jan 23, 2012
Messages
4,464
Location
Lincoln UK
Occupation
Admin
Good day DD
Please see attached may help you.
Kind regards
Uffex
 

Attachments

  • H2 Thumb control 1.pdf
    1.9 MB · Views: 27
C

check

Senior Member
Joined
Apr 1, 2012
Messages
800
Location
in the mail
The previous owner of my 1992 E70B installed a hydraulic thumb. Here are pics of the plumbing;
 

Attachments

  • Thumb 001.JPG
    Thumb 001.JPG
    2 MB · Views: 40
  • Thumb 002.JPG
    Thumb 002.JPG
    2 MB · Views: 35
  • Thumb 003.JPG
    Thumb 003.JPG
    2 MB · Views: 36
  • Thumb 004.JPG
    Thumb 004.JPG
    2 MB · Views: 35
C

check

Senior Member
Joined
Apr 1, 2012
Messages
800
Location
in the mail
And here is the solenoid valve he mounted below the radiator. it is controlled by the switch on the right joystick and the hoses go to the pilots on the third section of the main valve bank.
 

Attachments

  • solenoid 001.JPG
    solenoid 001.JPG
    1.9 MB · Views: 29
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