1520 hydraulic leak

[OregonAaron]

Howdy, so a couple weeks ago I just got my 1520 running good again... Today I was using it to do some light road repairs and it developed a nice hydraulic fluid leak directly on the opposite side of the tractor from the 3 pt lift lever. When I lift/lower the 3 pt it gushes out pretty good. What am I look at to repair this? Just a quick seal or o-ring? I'm hoping for the best, any advice or comments are appreciated.

 

[OregonAaron]

Looking at my shop manual it looks like the part is some sort of pressure relief/check ball type of thing. I'm wondering if I can just pull it out for inspection or replacement.

 

[Jim.ME]

(quoted from post at 17:39:31 03/13/22) Looking at my shop manual it looks like the part is some sort of pressure relief/check ball type of thing. I'm wondering if I can just pull it out for inspection or replacement.

Here is a page from the 1520 parts catalog that may help you. Looks like you may have item key # 6 which is an adapter fitting.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/81716/referrer/navigation/pgId/249295

 

[Tx Jim]

Fitting(item 6) was utilized to attach a hose for operating an external one way hyd cylinder. To raise external cylinder with 3pt control lever one needed to secure 3 pt hitch in the lowered position

 

[OregonAaron]

Hmmm, wonder why mine is all of a sudden leaking like crazy. I will pull it out tomorrow or the next day.

 

[Tx Jim]

Sometimes O-rings get brittle from heat/age & leak. It's possible 3 pt linkage for rockshaft control requires adjustment as outlined in 1520 tech manual.

 

[OregonAaron]

Okay, I see several adjustments for the rockshaft linkage. Rate of drop, negative drop, neutral range, control lever position, and load control. I will check these out once I get the leak fixed. Would any of these being out of adjustment cause any problems aside from making operation more difficult?

 

[Tx Jim]

When rockshaft raises & reaches top of travel if linkage is adjusted correctly control valve will neutralize stopping pump pressure from being applied to rockshaft piston seal. Correct settings of L/D mechanism will cause it to operate as designed.

 

[OregonAaron]

I'm going to say the o-ring is toast.