3510i hydraulic pump noise

[jcgbranson]

I changed hydraulic fluid and filters in my 3510i for the first time last fall. Nothing out of the ordinary. BUT...since then, the pump has been a bit louder than it was before. It has a bit of a whine to it. Noise goes away when I put a load on it by raising loader/tipping bucket. Any ideas???

 

[jcgbranson]

Maybe I can answer my own question....I remember reading several issues with filters....hmmm...I believe I used the wix equivalent. I wonder if I put an OEM Branson filter on if it would fix the little noise issue??? Can I change the filter without dumping all the fluid I wonder?

 

[oldnslo]

Depending on the filter location maybe. Can you have some one hold a shop vac to the fill port while changing the filter. The added vacuum in the tranny housing will significantly reduce the oil flow.

Noise going away under load seems strange if the pump was cavitating.

 

[jcgbranson]

Thanks oldnslo. I thought the noise leaving while under load was odd too...that's what didn't make sense to me. Loader seems to work okay even though a bit slow in the cold winter we have had....i see yer in Northern IL....me too. I'm ready for spring. Yes, I could do the shop vac thing and try it this thursday with a high of 10 degrees although I don't have a Branson filter on hand. -Don't really want to go through that if it won't change the noise I'm hearing though.

 

[oldnslo]

JCG,
In looking at the parts break down on the 3510I I noticed there is an inlet strainer in the tranny housing as well as the spin-on inlet filter for one of the pumps. Looks like the 3510I has two separate pumps but I couldn't determine which pump was was for what function. Yes the cooler weather is causing more problem this year. If the hydraulics are slow and speed up as the oil warms this would also be an indication of the pump cavitating or starving for oil. Since the filter is on the pump inlet any increase in pressure drop through this filter will cause the pump to cavitate or starve for oil. Usually cavitation is more growling / knocking noise under pressure not whining at low pressure.

Look at the upside of the cold weather the oil doesn't flow as fast so changing the filter should be easier

 

[Lunk]

Maybe I can answer my own question....I remember reading several issues with filters....hmmm...I believe I used the wix equivalent. I wonder if I put an OEM Branson filter on if it would fix the little noise issue??? Can I change the filter without dumping all the fluid I wonder?

You should only lose 1-2 gallons fliud changing the filter only. That's the amount I'd typically use to top off after changing filters.

I'd stick with factory filters too. Just not worth saving a few bucks on something that's the changed every hundred hours or so...

My. 02

Lunk

 

[jcgbranson]

Thanks guys. Do you guys get filters through local dealers or is there some sort of "factory warehouse OEM filter place"....or whatever...?

 

[oldnslo]

I use my local dealer since they are only 5 miles away. I am with Lunk that saving a few $$ on the filter and costing you $100's for a replacement pump just is not a very economical choice.

On my little 2400H the HST filter and main pump inlet filter are around $20 each and supposed to be changed every 250 hrs.

 

[jcgbranson]

I couldn't agree more on buying high quality filters....I thought I was. Guess it isn't quite right for the tractor though. Only problem is I bought the tractor used and don't have/know a dealer close by. Sometimes the dealers want to shun you a bit if you didn't buy through them....you know how it goes. If you don't mind me askin'....who is your dealer oldnslo? -can't be too awfully far away from me.

 

[oldnslo]

NITE Equipment located west of Rockford on hwy 20. Estimate: 25 miles from I90 - bypass 20 interchange. They are a family owned business and don't seem to care where you bought your equipment.

Northern Illinois Tractor & Equipment
2388 N. Conger Road
Pecatonica, IL 61063

Phone: 815-239-9096
Fax: 815-239-9032
info@niteequip.com