79-5670 part number for Hydro Filter for 520-H.

[DanM0919 1]

Good Evening, just purchased a 520-H and am doing all the fluids, filters, belts, and stuff like that. It is a model# 4120OE03 SN# 2000425 but I have no idea on the year. After downloading the parts manual from the Toro website, I see the Hydro filter part number is 79-5670 (excerpt attached). Unfortunately I find nothing about this filter part number on the internet; this is odd. There is a NAPA filter # 1410 that I removed but it has sustained significant internal damage. Not sure I want to put a new filter with that same number back on there if it is incorrect. Any advice from more experienced and knowledgeable folks would be appreciated. Thank You.   

3836 Parts Excerpt.pdf

[JCM 9,323]

Toro # 137-5012 engine oil filter and #82-0680 air seal gasket around filter. Hydro filter # 79-5270.

[oliver2-44 9,847]

The  Onan engine oil filter crosses over to Wix 51726

The transmission oil filter crosses over to Wix 51410 or NAPA Gold 1410

Many on here use the Wix or Napa filter. We would be very interested in seeing pictures of the internal damage. These and the Toro are hydraulic filters, so they do not have a bypass. If it was allowed to get very dirty it would seem reasonable that it could substandard internal damage.  Thoughts @squonk He’s our resident Napa guy

Edited August 1 by oliver2-44

[Racinbob 11,194]

I picked up some 79-5270 Toros mainly because they spec 10 micron. Not all the crossovers are that fine but I'm not sure it really matters. Many have been using the other brands for years with no issues.

[squonk 41,291]

What do you mean the filter had internal damage. 1410 filters are way more stout than the older Toro/ Wheel horse filters in both the media and the steel casing. The more recently made Toro filters are made much better.

 

To damage a 1410 a gorilla must have installed it or the high pressure relief in the transmission failed and the lift lever was held at its limit. 

[squonk 41,291]

1410 cut open:

    

 

Older Wheel Horse filter.

 

 

 

The modern WH filter is made more like the Wix filter

 

 

[WHX?? 49,130]

Every hydro I have has a 1410 on it except for the ones that don't...

No issues. 

[DanM0919 1]

Thank You all. I will attribute the erroneous part number to being a "typo" from Toro. All I could find on the subject was the part number you all referenced, being 79-5270. So it appears I should be safe to reinstall a NAPA 1410 (next time I am near a NAPA parts store). There appears to be no nearby Toro dealerships for me to get the OEM part(s). 

Out of curiosity (my own and several of you), I did inspect the NAPA filter (see photos attached). There appeared to be no external indications of damage and what i saw internally suggested that overpressure was the issue ( per squonk). Hopefully it is not a latent problem that will re-occur. Everything else with the transmission and hydraulic lift (snowblower) seemed functionally fine. Though the unit is not pretty to look at right now it does run and drive fine. 

... hopefully this new task of reviving this old tractor doesn't turn into obsession.    

 

[squonk 41,291]

27 minutes ago, DanM0919 said:

 

    

 

 

 

 

I can tell by the label alone that filter was VERY OLD! This picture is from around 2013.

 

Your filter's " NAPA " label is much older than that. 

 

[Handy Don 12,436]

1 hour ago, DanM0919 said:

i saw internally suggested that overpressure was the issue

Yikes, that did suffer!

The fluid circulation from the Eaton 1100  charge pump is constant through the lift control valve and the filter and then into the motion pump inlet. Operating the lift diverts fluid into the lift cylinder but even it the cylinder stalls while holding the valve and thereby raising the pressure, the pressure relief opens at about 700 psi to let the fluid continue circulating (fluid flowing through that open valve emits a distinct “squeal”). Generally there will very low pressure as the fluid reaches the filter. 

 

The only impediments to fluid flow after the relief valve would e damaged hose or tube or else clogged filter media. The latter is what I’m seeing here--it allowed the pressure to build up and eventually crush the filter inward regardless of the lift valve operations.

 

Given this impediment to fluid flow probably developed over time, I suspect that the motion pump/motor “pulling” fluid may have created a further pressure differential across the filter media. If the flow was insufficient to the motion pump, it may have damage as well.

 

Lastly, since the lift cylinder operates on the difference between the high charge pump pressure and the low filter inlet pressure, your lifting capacity was likely also reduced somewhat--did you notice?

Edited August 1 by Handy Don

[WHX?? 49,130]

3 hours ago, DanM0919 said:

hopefully this new task of reviving this old tractor turns into obsession

There... fixed that Dan.

Otherwise yer preachin to the choir here...

[DanM0919 1]

4 hours ago, Handy Don said:

Yikes, that did suffer!

The fluid circulation from the Eaton 1100  charge pump is constant through the lift control valve and the filter and then into the motion pump inlet. Operating the lift diverts fluid into the lift cylinder but even it the cylinder stalls while holding the valve and thereby raising the pressure, the pressure relief opens at about 700 psi to let the fluid continue circulating (fluid flowing through that open valve emits a distinct “squeal”). Generally there will very low pressure as the fluid reaches the filter. 

 

The only impediments to fluid flow after the relief valve would e damaged hose or tube or else clogged filter media. The latter is what I’m seeing here--it allowed the pressure to build up and eventually crush the filter inward regardless of the lift valve operations.

 

Given this impediment to fluid flow probably developed over time, I suspect that the motion pump/motor “pulling” fluid may have created a further pressure differential across the filter media. If the flow was insufficient to the motion pump, it may have damage as well.

 

Lastly, since the lift cylinder operates on the difference between the high charge pump pressure and the low filter inlet pressure, your lifting capacity was likely also reduced somewhat--did you notice?

Thank You. Because I just purchased this tractor I really cant answer. It did seem to raise and maintain the two-stage blower (quite heavy) just fine. And Yes the filter was pretty grody looking so hopefully the new filter will be just fine. 

[oliver2-44 9,847]

6 minutes ago, DanM0919 said:

 And Yes the filter was pretty grody looking so hopefully the new filter will be just fine. 

 Thank you for taking this Horse into your Herd and giving it the TLC it deserves.  It may be your first one, but you will have a Herd soon, as they do multiply.