I have a 2015 3520H. Also had the HST return spring fail at about 90 hours. Found a set of 2 comparable springs at Tractor Supply and replaced it. It was a little stiffer, but I got used to it. Now I have a spare, but I don't expect I'll ever have to replace it again.
Also had a DPF clogging issue at about 70 hours. I don't plow with it or otherwise drive it hard, so the DPF clogging is just something you must deal with, thanks to idiots in suits in Washington D.C. who don't even know what a tractor sounds like.
When my DPF clogged, I took it to the dealer from which I bought it, and they "made it breathe better, wink wink". I presume they drilled a few holes through the DPF media because it smokes a little bit now but not as much as a non-DPF tractor, but has run about 125 more hours with no issues. I also had a regular muffler made with the input and output pipes bent to replace the DPF, but it is quite a bit louder and makes it smoke a lot more so I don't use it. I kept it in the event the DPF ever got clogged again, but I'm beginning to think I'll never need it.
The biggest failure I had was the dashboard panel went out at about 85 hours. The dealer said it wasn't part of the warranty, and so he wanted $850 to replace it. I grimaced, but had no choice. I took it in and he replaced it and did the 50 hour service as well. The bill came to a little under $600 because he said he felt bad about the instrument panel going out and it not being a warranty thing. It may have been a warranty thing and he screwed me? Oh well, he's gone under since then so I have no idea.
I came here looking for the proper oil filter set for it. I have been keeping notes on it as I service it and at the bottom of the message, are the notes I have kept on it when I did maintenance.
I am changing out the hydraulic fluid again and want to know which transmission / hydraulic filter set to buy. I have had zero luck cross referencing those. I do have a Wix 51202 for the large one, but am not exactly sure that's the right filter. The Korean filter numbers on the Branson ones don't cross reference to any other filters, and I'm not going to pay $25 each for them again.
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Engine Oil:
10W-30 Synthetic for Diesel Engines
Engine Oil filter:
* Baldwin B1432
WIX Preferred : 51522
WIX Recommended: WL7237 (Too small in my opinion)
WIX Recommended : 51626 (Too small in my opinion)
Purolator One PL25288
Transmission & hydraulic oil :
Texaco TDH 1893
Hydraulic filters MUST have the gasket around the far outer edge!!
Large Hydraulic Oil Filter:
Branson/Kukje : NTB8030000B3
* Wix Recomended : 51202
Luber-finer LFH4922
Small Hydraulic Oil Filter:
Branson/Kukje : TA00000859A
* Baldwin B7125 Preferred
Donaldson P551352
Air Filters:
Original Air FIlter Set Donaldson
Large Outer : P822768
Small Inner : P822769
Wix Recommended:
Large Outer : 46489
Small Inner : 46490
Options:
DONALDSON P822769 - 138 air filter cross reference
My filter order for a full fluid maintenance is about $65. It is here...
