B1700 Hydraulic leak

[Snekypete]

I have a B1700 HST and I have a hydraulic leak that seems to be coming from under the seat somewhere on the right side. Does anyone know what might be going on?

 

[1970cs]

Pictures of area?

 

[D2Cat]

Snekypete, you're going to have to provide additional information, pictures, etc.

It's morning, and I can only come up with a wise ass answer. Something that is suppose to hold hydraulic fluid in place is not doing it's job!

Could be a failed O ring in the inner bowels of anywhere using hyd. fluid. Or, a loose fitting. Or, a breather tube plugged.

 

[Snekypete]

View attachment 22788 View attachment 22788

This area

 

[Snekypete]

Looks like it is coming from around here.

 

[D2Cat]

Might put a wrench on that "banjo bolt" and be sure it is snug. If that is where it is leaking and the bolt is tight there is usually a flat copper seal on both sides of the banjo. You'd need to replace those.

Before taking anything apart analyze the problem to be sure what you're trying to do.

Clean the area real good with pressure hose. Run the tractor and watch for actual leaks. Sometimes you can put a paper towel there, as you run the tractor, and see it it absorbs oil.

 

[Snekypete]

Might put a wrench on that "banjo bolt" and be sure it is snug. If that is where it is leaking and the bolt is tight there is usually a flat copper seal on both sides of the banjo. You'd need to replace those.

Before taking anything apart analyze the problem to be sure what you're trying to do.

Clean the area real good with pressure hose. Run the tractor and watch for actual leaks. Sometimes you can put a paper towel there, as you run the tractor, and see it it absorbs oil.

OK, thanks for the info. I tried to tighten already and it was snug. I think the leak is coming from the other side of that thing that is bolted. I will clean it up and check again. Thanks.

 

[1970cs]

If memory serves that line was kinda of a problem child with that tube cracking at the braised area where the banjo meets the tube. You may get lucky and replace the sealing washers at the banjo fitting?

Pat

 

[Snekypete]

If memory serves that line was kinda of a problem child with that tube cracking at the braised area where the banjo meets the tube. You may get lucky and replace the sealing washers at the banjo fitting?

Pat

Ok thanks.

 

[Snekypete]

If memory serves that line was kinda of a problem child with that tube cracking at the braised area where the banjo meets the tube. You may get lucky and replace the sealing washers at the banjo fitting?

Pat

Well you were right the tube had a crack in it. Had to take it to Kubota dealer to get it fixed.

Thanks.

 

[Stooge]

Just came across this thread in a search and my B1700HST has the same leak point at the brazed connection to the Banjo fitting. I found it happens only when I raise the rear arms to the fully up position. It's like the pressure builds at that point and then the leak starts. Is this a return line (i.e. no pressure) or a feed line to the FEL that is always under pressure?
Thanks

 

[torch]

Just came across this thread in a search and my B1700HST has the same leak point at the brazed connection to the Banjo fitting. I found it happens only when I raise the rear arms to the fully up position. It's like the pressure builds at that point and then the leak starts. Is this a return line (i.e. no pressure) or a feed line to the FEL that is always under pressure?
Thanks

When the arms hit the fully up position, the relief valve opens and the pressure is at maximum.

 

[whitetiger]

When the arms hit the fully up position, the relief valve opens and the pressure is at maximum.

When the three-point arms are fully raised the relief valve should not open, the control valve is shuttled to the neutral position. If the three-point feedback link is adjusted too short when fully raised the piston -to- rockshaft arm will contact the rear axle center housing and continuously blow the relief valve, which it should not do.

 

[torch]

When the three-point arms are fully raised the relief valve should not open, the control vale is shuttled to the neutral position.

True.

My comment would only be accurate if the feedback link was improperly adjusted.

Let me rephrase:

There's no pressure on the supply line when the control is in neutral. Pressure rises as the arms go up and lift the load. Then returns to near-zero when the feedback mechanism kicks the lever back to neutral.

The highest pressure reached in the system depends on the weight of the load, up to the maximum of the relief valve setting. Which also protects the tractor if the rockshaft reaches the end of it's travel in the case of a misadjusted feedback mechanism.

A tiny crack or other leak may only be apparent when the pressure rises.

Tip for finding tiny leaks: clean the area well (possible means include detergent, degreaser, pressure washer, brake cleaner). Dry thorougly. Dust the area with flour. Start the tractor and operate under load a few times, then shut down and inspect for wet flour surrounding the leak.

 

[Stooge]

When the arms hit the fully up position, the relief valve opens and the pressure is at maximum.

Thanks for the reply. I figured something like that was happening. Was hoping I could get away with a quick fix using JB Weld but looks like I need to bite the bullet and replace the line. Looks like it will be a pain to get it out.

 

[BoundforGlory1]

Thanks for the reply. I figured something like that was happening. Was hoping I could get away with a quick fix using JB Weld but looks like I need to bite the bullet and replace the line. Looks like it will be a pain to get it out.

Snekypete,

Was wondering how replacing that line went for you? I have the same issue. Just waiting for the part.
If you could get back to me that would be great.
Thanks.