DPF /DEF

[kenmac]

Was at the Case dealer the other day looking for a cab tractor. Looked at a 75 HP Case cab tractor. Dealer told me they are meeting emissions without DPF,or DEF.
So, appears there is another brand that meets EPA specs other than Mahindra that doesn't require DPF/DEF

 

[Motorboatin]

The Massey 1700M series doesn’t have a DPF

 

[Ccdteacher]

That痴 why I took delivery of a Massey 1740m on Monday. I was concerned about the regen.

 

[deserteagle71]

The Case 75 HP is just a different color but same tractor as the New Holland T4.75 that I was considering buying. They, and others, use a "Particulate Matter Catalyst" (PMC) to clean the exhaust instead of a DPF. Be aware that they still require the engine to run at high rpms to keep the exhaust system hot enough to burn off the soot! Regardless of whether a tractor uses DPF or PMC to meet Tier 4 requirements, BOTH need to be run at high rpms, with minimal idling. Quoting from the New Holland literature the dealer gave me: "The (PMC) simplest system around, it requires minimal operator intervention with fewer occurrences of regeneration than competitors with a DPF".

What they're really saying is that the PMC system is actually "regenerating" continually, burning off soot as it runs through the catalyst. That's why it too has to run at high rpm, to keep that catalyst hot. Whereas a DPF system such as in my Kubota only regenerates after a certain amount of soot buildup in the DPF is detected.

I know of no Tier 4 tractor under 80 hp that uses DEF. They use either a DPF or PMC but none require DEF usage.

 

[kenmac]

The Case 75 HP is just a different color but same tractor as the New Holland T4.75 that I was considering buying. They, and others, use a "Particulate Matter Catalyst" (PMC) to clean the exhaust instead of a DPF. Be aware that they still require the engine to run at high rpms to keep the exhaust system hot enough to burn off the soot! Regardless of whether a tractor uses DPF or PMC to meet Tier 4 requirements, BOTH need to be run at high rpms, with minimal idling. Quoting from the New Holland literature the dealer gave me: "The (PMC) simplest system around, it requires minimal operator intervention with fewer occurrences of regeneration than competitors with a DPF".

What they're really saying is that the PMC system is actually "regenerating" continually, burning off soot as it runs through the catalyst. That's why it too has to run at high rpm, to keep that catalyst hot. Whereas a DPF system such as in my Kubota only regenerates after a certain amount of soot buildup in the DPF is detected.

I know of no Tier 4 tractor under 80 hp that uses DEF. They use either a DPF or PMC but none require DEF usage.

why did you go with kubota instead ? Can't remember. But I believe they are a lighter tractor than the case

 

[5030]

No matter DPF or PFF r whatever, the burned soot collects inside the cannister and at some point the cannister has to be cleaned or renewed. Fact of Tier 4 emissions.

 

[deserteagle71]

why did you go with kubota instead ? Can't remember. But I believe they are a lighter tractor than the case

Purely a matter of cost. I would have preferred the New Holland - because the dealer is only 12 miles from me, next nearest is a Kubota dealer at 130 miles. Plus, I liked the New Holland cab a bit better. But the dealer didn't stock one; I would have had to place an order and then wait for a few weeks. While I was contemplating doing that, the Kubota M7060HDC12 with only 179 hours on it came up on Craigslist and the price was right - thousands less than the new New Holland, plus I got a couple attachments with it I really wanted. I've got 352 hours on the Kubota now and so far am really happy with it. No problems whatsoever.

I too would have preferred an older tractor without all the Tier 4 crap on it, but the only ones for sale anywhere near me seemed to have 8000 hours on them and were beat to death. So far the DPF has turned out to be a non-issue. Sometimes I notice that the regen light is on on the dash - but there's nothing I need to do if the tractor is regenerating, just keep working. If it weren't for the light coming on I wouldn't know the regen was happening. Only once since I got the tractor was it different - I was done with whatever it was I was doing and was going to park the tractor back in the barn but I saw the regen light was on. So I parked the tractor with the engine running at ~ 1800 rpm; when I went back 15 minutes later the regen light was off so I parked the tractor.

 

[kenmac]

I'm looking for a little larger HP tractor than 75 hp. As has been said, once you get over that, it's both DEF & DPF. So I'm looking at an older 100 hp unit with about 3k hours

I wish you the best with yours. I was at another Kubota dealer yesterday. He stated they had several issues with the ones with DPF only
Said they wouldn't regen which de-rates the power to the tractor. Said They have to connect the computer to force the regen.

 

[Thumper & Buttercup]

I would not call 1900 RPMs having to run high RPM's. That is where I run our T4.75 mowing and snowblowing.
Our old DX60 was bad, that one you were within 100 rpms of max to run 540 on the pto.

I really like our New Holland better than any other tractor we have ever had.