2120 Cavitating

[scottbennet]

I have a 2120 and it appears to be sucking air. When I raise the bucket, it staggers or hiccups (hard to describe in words). From what I understand, it has to be sucking air on the suction side. I don't see hydraulic fluid leaking anywhere, but I don't think that's unusual for a suction leak. Any ideas on where it likely would be or how to find it. Thanks in advance. Scott

 

[RickB]

Those symptoms are also indicative of a plugged filter.
Step one, change the filter.

 

[scottbennet]

Thanks. I changed the fluid (and the filter) last winter and put only 100 or so hours on it this year until it started doing it a couple of weeks or a month ago.

 

[Soundguy]

don't have alot of water ( frozen? ) in that sump do ya?

soundguy

 

[Gator6x4]

If memory serves another New Holland owner had a problem somewhat similiar. He tightened his filter a quarter turn and his problem went away. You may try this prior to changing the filter.

 

[Soundguy]

is the oil looking foamed.. does the foam settle out or is it emulsified?

soundguy

 

[scottbennet]

Thanks guys for your help.
To specifically answer your points:

1. 電on't have alot of water ( frozen? ) in that sump do ya? - doubt it. Problem started before freezing temps. How would I tell ? Drain it ?
2. 的f memory serves another New Holland owner had a problem somewhat similiar. He tightened his filter a quarter turn and his problem went away. You may try this prior to changing the filter. -- Will do. Problem started well after fluid/filter change. But checking tightness wouldn稚 hurt.
3. 妬s the oil looking foamed.. does the foam settle out or is it emulsified? -- I did check this after the problem started. No I don稚 see any foaming. But I was pulling the dipstick. Is there a better way to check?

I would like to note that one of the loader lift pistons is leaking and the end (whatever that痴 called) appears to be a bit loose. I did ask someone locally and he indicated that wouldn稚 introduce air into the system.

Any more thoughts would be appreciated

 

[Soundguy]

draining some oil from the sump into a jar after running it will tell you if it is emulsified.

soundguy

 

[shaley]

What kind of loader? Who made it.

 

[scottbennet]

It's a Ford one. The 758B.

 

[wdchyd]

Scott,

If you see foamy/milky oil the problem is like you said "air entrainment" and it gets sucked in from an N/G or loose suction line/tubing, or it could be a leaky shaft seal on the pump......clogged suction strainer/filter or oil too thick will compound this condition.....

Best to check all connections and glob grease on the shaft seal if it's out in the open.....

It's rare to have the cyls introduce air as it would need an overrunning load to create suction to have this happen.....

I'd double/triple check all suction connections/piping/hose before proceeding....:thumbsup:

 

[wdchyd]

And of course, (don't want to wear it out but) a flow/test meter will show quite quickly if it's air entrainment...the needle would jump and dance .....

Kubota Flow/Load Meter Test - Tractor Videos - Kubota, John Deere, New Holland and More

Bill

 

[shaley]

I'd unscrew the hydraulic filter and check the O-ring. The filter is vertical on that machine so it shouldn't spill much oil. Check the piece of flex hose and band clamps just before the filter as well.