Ford 770B FEL on 1310

   / Ford 770B FEL on 1310 #1  

70x100

New member
Joined
Aug 13, 2015
Messages
10
Location
Latham, MO
Tractor
Ford 1310
I am reworking the back yard with a friend's tractor. He's not internet savvy so I'm just doing the research and will talk to him before doing anything to his tractor.

When he brought it to me, the FEL bucket would curl and dump whether it was empty or full, no problem. However, while the arms would raise and lower full travel when empty, they would only go up a foot or so with a load in the bucket. He said it worked until he removed the FEL from the tractor for whatever reason. No problem, I'm not loading a truck, just moving some dirt around to correct a bad grade, rough mowing, wet basement, blah blah. Mostly I'm using the box blade on 3PH.

Yesterday I was going along and suddenly the steering wheel slipped hard left and fought me. Try as I did, I could not bring it back to center. When I checked the 3PH it was too far in the lift direction. Put the lever back in the notch and steering control returned. Big sigh of relief that it was that simple. I mention it only bc it's related to the hydraulics.

An hour later when using the bucket as a dozer it popped an old hose; it was about to go anyway. We replaced the hose no problem, cycled the bucket and arms full travel a few times, now the entire loader functions empty but ZERO lift or curl with a load. There's still enough oomph to lift the front wheels though. That said, I didn't try to see if it would do that to travel limit.

Friend is fretting major expense like a pump. But it only seems to be affecting the FEL where we've been turning wrenches, so I'm sure it's something simple like a spool adjustment or most likely air in the cylinders which will have to be purged, but neither of us know how to do this.

Any ideas? Pictures would help but aren't necessary.
 
   / Ford 770B FEL on 1310 #2  
How about the 3pt lift? Does it have full power? That lift (3 point) should lift 1000lbs. If it has full power then the pump is probably OK.
 
   / Ford 770B FEL on 1310
  • Thread Starter
#3  
I don't have anything that I know is 1000lbs, but I'm sure 3PH has full power. Like I said, the FEL bucket was curling just fine prior to the hose change. It MUST be something simple, like purging a giant air bubble from the cylinder. Just not sure which way to do it.

e.g. on the bucket cylinders. Do I extend the cylinders all the way and fill the top end, or do I put it in full curl to fill the top end? In either case, is vertical even the correct orientation, since the inlets are turned downward and there's no way to pour uphill. I'm even considering tapping a fill hole and threading a plug, but that's not how factory did it so there has to be a way, SOMEHOW.

*grumble and kvetch* wet year, late haying season, ground is finally ready to work NOW, more rain on the way this wknd
 
   / Ford 770B FEL on 1310 #4  
You just have to cycle them over and over if you think it is air in the line. Don't drill anything for sure. Make sure the Hyd level is full in the tranny. If 3pt lift has full power, the loader valve may have busted a seal when the hose broke.
 
   / Ford 770B FEL on 1310
  • Thread Starter
#5  
cycle over and over... is a dozen times enough? and while that will purge the lines, will it purge air from the dead-end cylinder?

loader valve busted seal... possible, but it still doesn't explain the arms. they were working, he removed the loader, he reattached the loader, they didn't lift a load.

edit:
if there's a busted seal, wouldn't there be fluid running all over?
 
   / Ford 770B FEL on 1310 #6  
....

edit:
if there's a busted seal, wouldn't there be fluid running all over?

Not necessarily. The loader valve has o'rings that can leak internally. Likewise the cylinders usually just leak from the high side to the low side thus not visibly. If the 3 point lift is getting full power AND it doesn't have some external pump for just the loader then you can tell your neighbor to chill out. Could also be a busted spring in the loader valve relief circuit.
 
   / Ford 770B FEL on 1310
  • Thread Starter
#7  
So, I went up to the local diner to the liar's table and asked my question there. I was sorta on the right track.

They say to extend the cylinder, loosen the hose on the opposite end and cover that fitting (unless you want to take a shower in hydro fluid), then move the control lever to bring the piston back in. When it sprays all fluid and no air, that side is purged and you tighten the fitting on that side. Then loosen the fitting on the hose on the other end of the cylinder and use the control to push the piston out and tighten back up. Top off fluid in the case and go.

Fluid is plentiful and there's no parts to buy to attempt a purge, so that is what I will try and report back. Start with the cheap and simple before getting into seals and springs and such, especially when there's no reason to suspect broken parts (as I said earlier, a busted seal MIGHT be the case with the bucket system since that's the system that popped a hose, but it doesn't explain the arm system, which crapped out after a disconnect/reconnect). But I thank you for the freebie.
 
   / Ford 770B FEL on 1310 #8  
Recheck your quick couplers, if ok a relief valve is stuck open. Drop the 3pt about half way down then check to see if it well lift. If loader works then the 3pt feedback rod needs adjusting.
 
   / Ford 770B FEL on 1310
  • Thread Starter
#9  
Okay, what and where is a relief valve? 3PH is ok, never any probs there.

Recheck your quick couplers, if ok a relief valve is stuck open. Drop the 3pt about half way down then check to see if it well lift. If loader works then the 3pt feedback rod needs adjusting.
 
   / Ford 770B FEL on 1310
  • Thread Starter
#10  
I got the drop/dump sides of each system purged, but haven't gotten to the lift/curl yet. Purging made such a mess I had to run it to the car wash, then run myself through the people wash. Skeeters are out hot and heavy, so I'll have to wait until tomorrow to do the other sides. Drop and dump actions seem a bit quicker though, so I THINK I'm on the right track.

...Fluid is plentiful and there's no parts to buy to attempt a purge, so that is what I will try and report back...
 

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