Hydraulic Oil in New Holland L785

Discuss your favorite brand and how to fix it.
Post Reply
JHALL
Cowhand
Cowhand
Posts: 28
Joined: Sat Sep 16, 2017 2:38 am
Location: Kansas

Hydraulic Oil in New Holland L785

Post by JHALL » Thu Aug 22, 2019 8:52 am

Hey guys, have a New Holland L785 skid steer. It’s developed a hydraulic oil leak and until I have a chance to find and fix the leak, was wondering if I can add a certain oil to the system to keep it full without any ill effects.

The book calls for a J20A spec oil which from what I understand is no longer a thing. We have some John Deere HyGuard which is J20C. Will this mesh with the oil that is in the system, assuming what is in there atleast meets the J20A specs?

Plan is to service everything on this machine over the winter but it’s supposed to be working right now. Thanks for any help!



ohiosteve
GURU
GURU
Posts: 1865
Joined: Mon Sep 26, 2011 3:16 pm
Location: Northern Ohio
Has thanked: 60 times
Been thanked: 55 times

Re: Hydraulic Oil in New Holland L785

Post by ohiosteve » Thu Aug 22, 2019 10:03 am

I run 30w motor oil in mine. The mechanic at the local dealership recommend it since it doesn't foam like hydraulic oil. This was almost 2000 hrs ago when I replaced the wheel seals. As you know that machine holds a lot of oil.
People are usually shocked when they find out I'm not a very good electrician.

User avatar
cfpinz
GURU
GURU
Posts: 5748
Joined: Thu Sep 08, 2005 12:11 pm
Location: Virginia
Been thanked: 46 times

Re: Hydraulic Oil in New Holland L785

Post by cfpinz » Thu Aug 22, 2019 10:42 am

Not sure on an L785, but our LX885 calls out for 30W engine oil in the hydraulics, and pretty much everywhere.
God is great, beer is good, and people are crazy.

cowrancher75
Trail Boss
Trail Boss
Posts: 224
Joined: Fri Mar 08, 2019 6:27 am
Has thanked: 64 times
Been thanked: 64 times

Re: Hydraulic Oil in New Holland L785

Post by cowrancher75 » Thu Aug 22, 2019 11:43 am

mine calls for 30w but i swapped to hy-gard as it says you can do that with it.

JHALL
Cowhand
Cowhand
Posts: 28
Joined: Sat Sep 16, 2017 2:38 am
Location: Kansas

Re: Hydraulic Oil in New Holland L785

Post by JHALL » Thu Aug 22, 2019 8:28 pm

Thanks for the replies guys. Would you advise against adding the HyGuard to what is currently in there? Thought about doing so to see if it worked so I could get by to finish putting hay up.

The leak looks like it’s coming from underneath, it’s not a line or anything up top, doesn’t look like. Point being, it doesn’t appear to be a simple fix.

Allenw
Trail Boss
Trail Boss
Posts: 400
Joined: Mon Jun 12, 2017 3:37 pm
Location: NW OK
Has thanked: 108 times
Been thanked: 33 times

Re: Hydraulic Oil in New Holland L785

Post by Allenw » Sun Aug 25, 2019 11:37 am

J20C will be fine oil is normally backwards compatible, new spec oil will be compatible with previous spec oil.

ohiosteve
GURU
GURU
Posts: 1865
Joined: Mon Sep 26, 2011 3:16 pm
Location: Northern Ohio
Has thanked: 60 times
Been thanked: 55 times

Re: Hydraulic Oil in New Holland L785

Post by ohiosteve » Sun Aug 25, 2019 10:12 pm

JHALL wrote:
Thu Aug 22, 2019 8:28 pm
Thanks for the replies guys. Would you advise against adding the HyGuard to what is currently in there? Thought about doing so to see if it worked so I could get by to finish putting hay up.

The leak looks like it’s coming from underneath, it’s not a line or anything up top, doesn’t look like. Point being, it doesn’t appear to be a simple fix.
Check your wheel seals. It is very common for them to leak on those machines. You will see a wet spot on the bottom of the axle housing.
People are usually shocked when they find out I'm not a very good electrician.

Texasmark
Rancher
Rancher
Posts: 849
Joined: Fri Apr 14, 2017 6:56 pm
Location: N. Texas
Has thanked: 70 times
Been thanked: 52 times

Re: Hydraulic Oil in New Holland L785

Post by Texasmark » Tue Aug 27, 2019 5:08 am

ohiosteve wrote:
Sun Aug 25, 2019 10:12 pm
JHALL wrote:
Thu Aug 22, 2019 8:28 pm
Thanks for the replies guys. Would you advise against adding the HyGuard to what is currently in there? Thought about doing so to see if it worked so I could get by to finish putting hay up.

The leak looks like it’s coming from underneath, it’s not a line or anything up top, doesn’t look like. Point being, it doesn’t appear to be a simple fix.
Check your wheel seals. It is very common for them to leak on those machines. You will see a wet spot on the bottom of the axle housing.
The wheel seal leaking comment would direct me to motor oil not hyd oil.....increased viscosity reduces opportunity to leak. Course hyd fluid has seal conditioners and motor oil doesn't as I know it. Yes 20c will outperform 20a and mix.....kinda of a heads I win, tails you loose sort of thing!

JHALL
Cowhand
Cowhand
Posts: 28
Joined: Sat Sep 16, 2017 2:38 am
Location: Kansas

Re: Hydraulic Oil in New Holland L785

Post by JHALL » Tue Aug 27, 2019 9:24 pm

ohiosteve wrote:
Sun Aug 25, 2019 10:12 pm
JHALL wrote:
Thu Aug 22, 2019 8:28 pm
Thanks for the replies guys. Would you advise against adding the HyGuard to what is currently in there? Thought about doing so to see if it worked so I could get by to finish putting hay up.

The leak looks like it’s coming from underneath, it’s not a line or anything up top, doesn’t look like. Point being, it doesn’t appear to be a simple fix.
Check your wheel seals. It is very common for them to leak on those machines. You will see a wet spot on the bottom of the axle housing.

Two of the wheel seals leak on the outside of the wheel, it’s developed a new leak that is coming from the drivetrain area. The skid plate is wet underneath the motor. Pretty sure it’s not motor oil as the fluid has a clear tint to it (the oil is black). I haven’t pulled the seat up to try to get a better look, not sure if there’s a hydraulic line(s) that run across there.

Texasmark
Rancher
Rancher
Posts: 849
Joined: Fri Apr 14, 2017 6:56 pm
Location: N. Texas
Has thanked: 70 times
Been thanked: 52 times

Re: Hydraulic Oil in New Holland L785

Post by Texasmark » Wed Aug 28, 2019 8:16 am

JHALL wrote:
Tue Aug 27, 2019 9:24 pm
ohiosteve wrote:
Sun Aug 25, 2019 10:12 pm
JHALL wrote:
Thu Aug 22, 2019 8:28 pm
Thanks for the replies guys. Would you advise against adding the HyGuard to what is currently in there? Thought about doing so to see if it worked so I could get by to finish putting hay up.

The leak looks like it’s coming from underneath, it’s not a line or anything up top, doesn’t look like. Point being, it doesn’t appear to be a simple fix.
Check your wheel seals. It is very common for them to leak on those machines. You will see a wet spot on the bottom of the axle housing.

Two of the wheel seals leak on the outside of the wheel, it’s developed a new leak that is coming from the drivetrain area. The skid plate is wet underneath the motor. Pretty sure it’s not motor oil as the fluid has a clear tint to it (the oil is black). I haven’t pulled the seat up to try to get a better look, not sure if there’s a hydraulic line(s) that run across there.
Microscopic metallic particles, (<20 microns for a number) will turn the oil black. Wheel bearings are a good example...you put in clear/color hued grease and come back later to find black grease!

Post Reply