Help needed - leaking hydraulics issue

[ejtaylor822]

Hey Chip.
Here is the view from the back. It's not a direct shot of the back but you can see the housing. The housing/clip, where the top link attaches, spans both the sump case and the axle housing.

It was mentioned that this was the mechanism for the draft control. I didn't think I had draft control, if I do, I don't know how to use /forums/images/graemlins/confused.gif Some one please correct me if this is in fact for the draft control. I am a novice.....

My thought was this is where a leak could be occurring - draining into the axle housing if this piece has a cavity.

 

[ejtaylor822]

Another view from the back looking forward - back of the lever and valve assy. Not looking forward to removing these hoses.

 

[ejtaylor822]

View from the front looking down the side towards the valve assy.

Chip,
Was thinking I could remove the front cover here and look at the piston. Was not sure though if I saw the O-ring trashed how I would get the piston out. Will start with taking the front cover off and go from there.

 

[ejtaylor822]

View 1 of the sump case parts diagram.

Notice the plate, part # 29. Appears in the diagram it is only 3/4's the length of the case. If the plate is totally internal and there is a chamber in the back, I can see where this could leak into the tranny.

Will be sure to take plenty of pics and document if I end up pulling the housing off. I am just curious how all of this works inside.

 

[ejtaylor822]

View 2 of the assembly.

 

[ejtaylor822]

Diagram of the lever and valve assembly.

 

[bluechip]

OK, not like anything I have worked on. There is some type of draft control as evidenced by the linkages attached to the yoke the top link attaches to but not sure how it works with only one lever, maybe like on Fords, Soundguy where are you? Anyway, I don't think that you will see much if you take off the front cap. but won't hurt to try. I think your bottom plate is cracked, or maybe just loose allowing oil to seep into trans. I know this is not necessarily good news, but let me know what you see when you take the head off the piston.

 

[GuglioLS]

</font><font color="blue" class="small">( ( ............. There is some type of draft control as evidenced by the linkages attached to the yoke the top link attaches to but not sure how it works with only one lever, maybe like on Fords.......................... ))</font>

EJtaylor & Chip,
FWIW - I will comment on the draft control.
I still have my old Ford (NAA) as well as my new Jinma354.
The NAA Ford has one lever Lift & Draft control - the draft works by moving a draft on/off lever. When draft is off the single lift/draft lever controls lift. When the draft is on the lift/draft lever controls the draft pressure instead of lift.

After looking at the photos posted carefully - I seems to have a draft option. As always I could be wrong. Maybe include the parts description that goes with the pictures? I wonder if there is some valve or lever somewhere that activates the draft ?

When you gather the courage to remove the TPH box - Don't be worried about removing those hose connectons - you will do fine.

 

[Soundguy]

Bluechip.. I looked at the diagram that shows the lift top cover.. very much looks like a late 60's / 70's draft setup

And Gug.. I'm not sure what diagram you looked at.. but... this one diagram Clearly shows the toplink rocker as aprt number 44.. it pivots on pin 78, in the housing 77 parts between 48 and 54 are part of the draft cushioning.. notice the large spring.. etc.

His picture of the rear does not show all of pivot plate #77.. but I suspect the hole plate 77/44 assembly can pivot, as there is a nut behind the plate that I believe is visible in
the pic.. so it may not be solidily affixed to the lift housing.. etc.

Without better pics of the rear showing all of 77 and 44.. hard to make the 100% determination.. but at least for now.. I would say the aprts are in place for a draft system.. whether it is fully implemented or somehow 'locked out'... etc..

Soundguy

 

[GuglioLS]

Attached above is a doctored up one of your photos.
It MIGHT explain how draft works or not.

Item 44 must be able to pivot in order for the draft feedback to work. Looks like the top two bolts may have someting to do with it. The bottom ones look like they must be tight at all times because it holds item 77 to the TPH box. Perhaps check your Chinenglish operators manual?

Soundguy - check it out. If those top two bolts are tite, then item 44 cannot pivot. I am thinking they need to be loosened inorder for draft to work. What do you think ?

If they are ever so slightly loose, draft might be working - causing slow drift down of his BB.