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Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 5430
Experience:  17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
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Need to fix o-rings on the blade control valve bank D3G.

Customer Question

Need to fix o-rings on the blade control valve bank for my D3G. Does Cat produce an o-ring kit for these? Do I need to release hydraulic pressure somehow if the blade is down and engine is off when I remove the control valve bank? Thanks, Dexter
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  Dan replied 1 year ago.

Hi my name is***** will try to help. what is your serial number?

Customer: replied 1 year ago.
JMH015XXX. I'm not looking at it now and don't recall the last few digits.
Customer: replied 1 year ago.
It's a D3G XL. I can't get the rest of the number later
Customer: replied 1 year ago.
Can get
Expert:  Dan replied 1 year ago.

With the blade down easy, put it in float and with the key on work the controls in all directions to bleed the residual pressure from the cylinders. Cat can look up the valve by your serial number. Sometimes they have seal kits listed and other times the seals need to be bought individually from the parts breakdown.

Customer: replied 1 year ago.
How do you get the blade into float? Thanks for the info
Expert:  Dan replied 1 year ago.

Most you push the lever all the way down but on some of the newer machines will have a switch for float.... I would have to look at the operators manual for this model... Do you have that by chance? If you put the blade down level without pressure on it and move the lever it will still bleed out the pressure with the IGN switch on.

Customer: replied 1 year ago.
Is "key on" just with auxiliary on or engine running. Thanks again
Expert:  Dan replied 1 year ago.

Key on, powering accessories engine not running

Customer: replied 1 year ago.
Great. I have the manual somewhere and the parts manual but just not the service manual. Thanks again for the help.
Expert:  Dan replied 1 year ago.

Pleasure to help