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Hydro/differential oil?


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#1 Unstuck747 OFFLINE  

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Posted January 13, 2015 - 08:06 PM

I've got the manual that says to put 90 weight oil in the differential but I cannot find where to fill nor have I heard this talked about? I didn't know you had to put separate oil in the diff than the hydro. This is my first jake and I'm just not familiar wih it.

#2 KennyP ONLINE  

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Posted January 13, 2015 - 08:26 PM

Don't feel lonely! I'm learning right along with you!


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#3 Tomwendt OFFLINE  

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Posted January 13, 2015 - 09:33 PM

fill hydro under seat pan.fill rear end on right side through plug hole till full.i got my jake from the scrap yard and this worked fine for me.


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#4 KennyP ONLINE  

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Posted January 13, 2015 - 09:48 PM

So the hydro and rear end are separate oils then?


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#5 Unstuck747 OFFLINE  

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Posted January 13, 2015 - 10:20 PM

fill hydro under seat pan.fill rear end on right side through plug hole till full.i got my jake from the scrap yard and this worked fine for me.


What oil did you use in the rear end?

#6 Tomwendt OFFLINE  

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Posted January 14, 2015 - 09:26 AM

80-90 in rear end. Type 111 dextron in the hydro.
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#7 KennyP ONLINE  

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Posted January 14, 2015 - 09:45 AM

Thanks, Tom! I have a new filter for the Hydro, so will change the fluid in it when temps warm some. Need to find that fill plug for the rear end. The 'Drive/No Drive' selector is real stiff, may have to remove it and see what's happening there. Could be a low oil situation?



#8 Unstuck747 OFFLINE  

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Posted January 14, 2015 - 01:59 PM

Thanks, Tom! I have a new filter for the Hydro, so will change the fluid in it when temps warm some. Need to find that fill plug for the rear end. The 'Drive/No Drive' selector is real stiff, may have to remove it and see what's happening there. Could be a low oil situation?


Mine doesn't move at all the knob just slips on the rod coming from the hydro
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#9 KennyP ONLINE  

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Posted January 14, 2015 - 03:30 PM

I don't have a knob. Been using channel locks to turn it.


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#10 Unstuck747 OFFLINE  

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Posted January 16, 2015 - 06:08 PM

Thanks, Tom! I have a new filter for the Hydro, so will change the fluid in it when temps warm some. Need to find that fill plug for the rear end. The 'Drive/No Drive' selector is real stiff, may have to remove it and see what's happening there. Could be a low oil situation?


Where's the drain plug for the hydro?
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#11 KennyP ONLINE  

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Posted January 27, 2015 - 06:10 AM

fill hydro under seat pan.fill rear end on right side through plug hole till full.i got my jake from the scrap yard and this worked fine for me.

I haven't found a plug on the right side as yet. I have to pull the tires, will look then!

 

Mine doesn't move at all the knob just slips on the rod coming from the hydro

I put some Acetone/ATF mix on there and mine loosened right up. Made a knob to fit. Have to get a pic of that.

 

Where's the drain plug for the hydro?

I'll be checking fluids today. I'll have some pics. But I haven't seen a drain for the hydro as yet.


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#12 Tomwendt OFFLINE  

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Posted January 27, 2015 - 09:26 AM

Download the jacobson hydro gear manuel.page 18 number 35 is the drain plug.
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#13 KennyP ONLINE  

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Posted January 27, 2015 - 09:29 AM

How much oil does it take to fill after draining?

 

Found it!

Hydro Gear drain plug.JPG


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#14 Tomwendt OFFLINE  

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Posted January 27, 2015 - 09:59 AM

About 2 quarts.fill to 1 inch below the fill hole.
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#15 KennyP ONLINE  

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Posted January 27, 2015 - 10:04 AM

About 2 quarts.fill to 1 inch below the fill hole.

Thanks, Tom! I'll be installing a new filter also!


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