L785 Wacky Hydraulic Line

[Rayhat]

Can anyone tell me why this “pump to final drive” line starts out in hard pipe goes away from the final drive motor under the hydraulic pump, does a 180 degree turn ,connects to a larger diameter Hose and then goes to the drive. The end to end connections are just a foot away from each other but they added another 8 inches and changed the direction and then increased hose diameter from pipe diameter. Can I just replace this with a larger like size diameter hose with some slack. I had to cut the pipe so as to not remove the pumps to get it out. The cuts are at the electric tape holding it in position for the picture. It’s line 18/19 in the diagram and if the video loads you can see the leak at the fitting.

 

[Shanmar]

Somewhat of a guess, but I think it may be challenging to get that size and pressure rating of a hose to make that bend.
Second thought is-is it needed to allow vibration/flexing between the pump and motor?
Besides that, I don't see a technical reason you can't replace it with a hose only IF you can make it fit and not come close to rubbing on anything.
Maybe you can do it with a 45 degree fitting. Pay attention to if you need swivels on one or both ends. Also, make sure you get the same hose pressure rating. Hydrostats usually run at higher pressures than the basic lift circuits. I see the parts book calls for 100R13 rated hose.

 

[Rayhat]

Somewhat of a guess, but I think it may be challenging to get that size and pressure rating of a hose to make that bend.
Second thought is-is it needed to allow vibration/flexing between the pump and motor?
Besides that, I don't see a technical reason you can't replace it with a hose only IF you can make it fit and not come close to rubbing on anything.
Maybe you can do it with a 45 degree fitting. Pay attention to if you need swivels on one or both ends. Also, make sure you get the same hose pressure rating. Hydrostats usually run at higher pressures than the basic lift circuits. I see the parts book calls for 100R13 rated hose.

Thanks all good advice. I’m leaning heavy towards just a hose. Why do you think that bend was even in the line at all. A heavy duty hose direct from pump to drive with some slack just seems so obvious. It’s a straight run