TB One on a 1390

Dark

New User
Hi, I'm new to the forums but I've got a friend who recommended it.

I've got a Case 1390 that I would like to get one of the TB One(Trail Blazer) FEL cutters, however to install it I have to plug one hydraulic line into the rear remote, the return line must be directly plumbed back into the reservoir.

Is there a place on the 1390 transmission to plumb this in? I was thinking of using the fill port near the rear remotes and just adding an extension to that with a T so I could plug in the line and cap off the top so I could continue to fill it, would this work?

The TB One requires a GPM of 9-15, and my case 1390 has a 15.3GPM pump I believe, I've heard that running the cutter can cause the fluid to be to hot for the machine but I've also heard of several people running the cutter directly plumbed into smaller GPM machines w/o any problems. Can my Case handle this cutter? There is a accessory pump available for $1900 with a 17 gal capacity that runs off PTO and sits on the rear 3 point hitch, however the salesman said I really didn't need it and I'd rather not incur this expense and I had one friend point out that if the PTO is hydraulic then the fluid is still getting heated.

Any input you guys could offer is appreciated. Thank yall
 
FWIW, the only thing "Case" on your tractor is the decals, It is a David Brown( not that that is a bad thing).

I don't know anything about the implement you are talking about... My humble opinion, 9-15 GPM at 2000 PSI isn't going deliver enough power to mow much(theoretical 10-17 HP). The oil may in fact get hot with continuous use as the tractor doesn't have an oil cooler.

there is a return port like you would need, standing behind the tractor, it is in in line with the left 3 point arm, generally over the axle. Should be 3/4-16"(1/2" O-ring) thread if memory serves, probably will take a 1 1/8" wrench.

If you have one of the pipe plug type fills that would be fine also. I would not use the fill port if you have one the plastic fill cap.

If you have the tandem pump, and it is in perfect condition, and your suction screen is spotlessly clean you might make 15GPM at max revs. 12 is more realistic.

A single pump will male 7-8 GPM if healthy.
 

RG,

You are correct, I just get used to calling it a case because thats how I have to look up parts for it.

thanks for the reply, the TB One is a Lane Shark clone and it's worth looking into. From talking to people who have it they tell me it cuts great and the only power loss is if you try to raise the cutter and cut at the same time.

The fill port I am talking about is a pipe threat that located above the Left rear 3 point arm, built in to the side of the PTO housing. Is this the same port you are talking about or is there another?

I'm going off of the 1390 spec's I have found online that says it has a 15.3 GPM pump, but I know that's ideal circumstances on a new tractor. My plan is to clean the screen and change the hydraulic filter as well. Does anyone know where the screen is located, I'm trying to read up on it because I've never known about it before starting this project.
 
(quoted from post at 15:28:21 02/19/20)


I'm going off of the 1390 spec's I have found online that says it has a 15.3 GPM pump,

only if it has the tandem pump, which was an uncommon option. the standard pump is 7.8 gpm, don't believe everything you read on the net. if you have 2 small steel lines that run under the tractor beside your engine oil pan, you have the big pump. One small line you have the single(both will have one large line for the return).

The fitting in the PTO box will work, but not what I was referring to.
 
I'm going to try to post a picture of the underbelly, the two lines running to the right, are those the lines your talking about?
mvphoto49549.jpg
 
Next question RG: is this the full plug
your talking about? I removed the cover
next to the seat and it's the only plug I
see directly over the left three point
hitch arm. It is 1 1/8"
 
Thank you, I just wanted to be sure, it'll be later this week before I can tackle this project again. Am I right in my thinking that there is no filter screen for my
hydraulic filter? I actually have two filters, one on the underbelly that usually has a screen(but mine does not) and then one by the Right Rear arm on the three point
hitch
 
Take a picture of your under belly filter when you have it off. I think it should be a washable steel screen. They may call it a filter though.
 

cvphoto6236.jpg


cvphoto6237.jpg


the yellow circle is the filter screen as I understand it, however, mine does not have that piece, it has a solid(magnetic?) cover in it's place. I'm at work so I can't
take a pic right now. The schematic picture is from the service manual and I think it replaces the filter screen with a secondary filter
 
The yellow circled piece is the bypass screen for a single pump tractor like a 990, 995, 1190, 1290 or similar. No tandem pump tractor I have ever been into has had that set up.


Your bottom "filter" should be a fine washable screen with a solid not removable bottom. I have seen magnets stuck on the bottom.
 
I was wrong, what I thought was a removable
solid piece was actually where the filter
is so old the solid metal bottom separated
from it. I don't have a screen at all. The
filter they sold me is made for the mod
with a screen because it has a hole in the
bottom, whereas mine is solid (as
pictured)
cvphoto6462.jpg
 
So just an update. I realized from reading the manual that the filter was renewable so I soaked it in gas and cleaned it really well and everything works fine.

I got all my lines plumbed in and got the cutter put on. The FEL works great but when I try to used the cutter it doesn't have the power to work. I hit the lever that shunts hydraulic fluid away from the three point hitch and puts it all to the remotes and the cutter will run but it bogs down easily. My guess is that I need to rebuild my hydraulic pump because I'm not getting as much pressure as I should? is this correct?
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top