Exhaust Mod on my 3725

[technomill]

I made the mod exactly as Slowpoke slim did with the Stanley IH4 muffler on my 2018 3520 Branson. I am very happy with the mod. I have had it like this for about three months now. Data logger completely removed and no issues at all runs great, rpm gauge works too. THANKS SLIM!
I do landscaping mostly so never really had to get the tractor that high in rpms. I was constantly having issues with DPF and having to run it full bore on the street for at least an hour to get the light to go out. One time it gave no indication of an issue just shut down and would not stay on, I had to have the DPF cleaned which cost 250.00. It was more than the mod. The muffler shop charged me 150.00 for the mod and I spent 38.00 on the muffler.
I feel like it does have more power, I definitely go up hills a lot easier and it lifts more than before. I attached a a couple of pics it came out really well muffler man did an excellent job and I still have the old unit in case I need to put it all back on.

 

[Slowpoke Slim]

Very nice Techno.

I'm glad it helped. It is a nice feeling to know you can run your engine how you want, based on the job at hand and not have to worry about the stupid exhaust filter.

I think the guys with the new model (2021?) with the manual regen and butterfly valve solenoid may need to do some extra steps to make this mod work. It sounds like they changed the wiring harness in the new design. We'd need some guys willing to dig into the wiring on theirs to figure out the pinout. I'm hoping that it's all in the data logger plug, and a guy could just figure out the right pins to jump across and make a jumper wire to complete the circuit in the plug.

Hopefully if someone with the newer design starts a mod, they will start another thread about it so we can all learn what the new mod will entail.

But for us (2020 and older) older tractors, the mod is really easy and straight forward.

2+ years into my mod and my tractor still runs flawlessly. I used it yesterday to dig out an area to put in a garden bed.

 

[Boswell]

I have a 2021 now nearing my 50 hour service. Have yet to see a regen light. My plan has been to leave system alone as long as it is working properly and not requiring constant regens.
Or hoping someone else does the modifications and posts procedure and results.

 

[Slowpoke Slim]

I have a 2021 now nearing my 50 hour service. Have yet to see a regen light. My plan has been to leave system alone as long as it is working properly and not requiring constant regens.
Or hoping someone else does the modifications and posts procedure and results.

I can't blame you for that. I wouldn't have modified mine either if it hadn't started giving me problems.

I'm still blaming it on the cold weather start up temps here. You may never have any problems on the upper west coast since you'll never see our temperatures there. But you will have to keep your rpms up in the upper range. And I'm assuming yours has the butterfly valve and the manual regen? Combining that change and upper rpm usage, you may well be fine in your climate.

 

[Boswell]

I can't blame you for that. I wouldn't have modified mine either if it hadn't started giving me problems.

I'm still blaming it on the cold weather start up temps here. You may never have any problems on the upper west coast since you'll never see our temperatures there. But you will have to keep your rpms up in the upper range. And I'm assuming yours has the butterfly valve and the manual regen? Combining that change and upper rpm usage, you may well be fine in your climate.

Yes Slim, you are correct. Climate on Oregon coast is very mild with wet winters. Snow is a rarity. I will have limited use for my tractor come November through February. Pastures will be too soft depending on rainfall. I am currently doing a lot of field mowing and will move to herbicide spraying. All of which I can control rpms easily with a gear driven tractor.
Yes, the exhaust system has the butterfly valve. I am assuming the regen button is what controls this valve. This system may have a little more to tinker with to disable properly but the fact there is no ECM should make it very doable. ( I hope) Time will tell whether I need to bother with a modification. Not having an ECM and the fuel delivery system was a deciding factor on my decision to purchase the Branson tractor.
Fully understandable why you had to go the muffler route. You did a fantastic job allowing yourself to reinstall in the future should you need to.
Kind regards, Norm

 

[ericm979]

Being able to run an actual regen should elimintate the DPF clogging problem that Slim and a few others have had on the older machines where there's no way to regen. Unless Branson somehow screwed it up, which is always possible with any manufacturer.

 

[bcs001]

I wanted to also chime in with my experience on a 2021 3620h model in north Ga. I have 82 hours and so far no regen required. I do try to keep RPMs up around 1200-1500 when working but I also do a fair amount of idling while in-between tasks, connecting, disconnecting and rigging chains. Unless it started requiring frequent regens, I probably will leave it stock for the foreseeable future.

Bruce.

 

[HawkinsHollow]

I am getting a new (refurbished I think) DPF can from my dealer today. I am very tempted to just do the delete anyways and save the new can for if I ever sell it.

 

[Jjohnson9989]

Isn’t there a model number for the European version of tractor that we could just order the muffler. I have a 5520ch. And am trying to find part numbers and no luck

 

[Larryb08]

Isn’t there a model number for the European version of tractor that we could just order the muffler. I have a 5520ch. And am trying to find part numbers and no luck

I'm in New Zealand and have 2021 6225H that is equipped with a regular muffler, no DPF.

 

[Jjohnson9989]

I'm in New Zealand and have 2021 6225H that is equipped with a regular muffler, no DPF. View attachment 715172View attachment 715173

Is there any way you can send me a parts list for my tractor. I think the European version of the 5520ch is called 5825ch. I would greatly appreciate. I have spent hours trying to find a European version service manual to no avail. You would be my hero. Haha. This forum is awesome btw. Huge help!

 

[ptsg]

Is there any way you can send me a parts list for my tractor. I think the European version of the 5520ch is called 5825ch. I would greatly appreciate. I have spent hours trying to find a European version service manual to no avail. You would be my hero. Haha. This forum is awesome btw. Huge help!

At the moment, there isn't a 5520 equivalent in Europe, or any of the newer models with the 4 range transmission for that matter. Not sure when those will get here. Currently we have the 5025 and the 6225. The 5025 uses the A2300 engine naturally aspired, while the 6225 uses the same A2300 but the turbocharged one.

In 2022, the new Stage V emissions will be applied in Europe and all new tractor have to compliant to Stage V, which most already are as most manufacturers have been making the change in 2021. This actually resulted on a lot of discontinued models, specially on Branson with only 3 models above 25 HP. I'm sure they will release more models once they get the older models up to the new Stage V spec.

This new Stage V requirement, is basically the same as the US now. Emissions stuff required on offroad equipment above 25HP, while before it was only required above 50HP. The later part of this paragraph is important be this means that the 5025 had a simple muffler, but being naturally aspired, it won't fit on your tractor. The other models 5825 (disconntinued) and the 6225, both have turbo, however, being that those are above 50HP, they have the DPF and not a muffler.

Maybe things are different in Australia on the emissions requirements, and there is a model there with A2300 turbo'd engine and a muffler instead of the DPF and a dealer is willing to ship the muffler to you. Otherwise, as Slowpoke Slim explained, it's very easy to retrofit one.

Another thing to consider, is that on the 2021 US models, the data logger has some of the engine wiring hardness integrated into it. So if you unplug the datalogger, I believe you lose the temperature indicator at the dash, accordingly to someone who tried it on this thread. We're waiting on the service manual to be available so we can investigate this further.

 

[Jjohnson9989]

At the moment, there isn't a 5520 equivalent in Europe, or any of the newer models with the 4 range transmission for that matter. Not sure when those will get here. Currently we have the 5025 and the 6225. The 5025 uses the A2300 engine naturally aspired, while the 6225 uses the same A2300 but the turbocharged one.

In 2022, the new Stage V emissions will be applied in Europe and all new tractor have to compliant to Stage V, which most already are as most manufacturers have been making the change in 2021. This actually resulted on a lot of discontinued models, specially on Branson with only 3 models above 25 HP. I'm sure they will release more models once they get the older models up to the new Stage V spec.

This new Stage V requirement, is basically the same as the US now. Emissions stuff required on offroad equipment above 25HP, while before it was only required above 50HP. The later part of this paragraph is important be this means that the 5025 had a simple muffler, but being naturally aspired, it won't fit on your tractor. The other models 5825 (disconntinued) and the 6225, both have turbo, however, being that those are above 50HP, they have the DPF and not a muffler.

Maybe things are different in Australia on the emissions requirements, and there is a model there with A2300 turbo'd engine and a muffler instead of the DPF and a dealer is willing to ship the muffler to you. Otherwise, as Slowpoke Slim explained, it's very easy to retrofit one.

Another thing to consider, is that on the 2021 US models, the data logger has some of the engine wiring hardness integrated into it. So if you unplug the datalogger, I believe you lose the temperature indicator at the dash, accordingly to someone who tried it on this thread. We're waiting on the service manual to be available so we can investigate this further.

Awesome. Thanks for your knowledge. Very helpful! I’m curious about the data logger. I followed a similar post and I thought it was resolved, the user forgot to plug something in..? If that’s the same thread you speak of. I’m going to keep digging, see if I can find something In Australia as you said. I’ll keep my findings posted. I’m sure I’m not the only one wanting a factory bolt on mod. Worst case I’ll fabricate but again thanks for quick response!!

 

[K5lwq]

Awesome. Thanks for your knowledge. Very helpful! I’m curious about the data logger. I followed a similar post and I thought it was resolved, the user forgot to plug something in..? If that’s the same thread you speak of. I’m going to keep digging, see if I can find something In Australia as you said. I’ll keep my findings posted. I’m sure I’m not the only one wanting a factory bolt on mod. Worst case I’ll fabricate but again thanks for quick response!!

You could test the theory by getting your tractor up to temp then shut it down and unplug the data logger. Then fire it up again and observe that everything works as it should. If it does you can proceed if not then you will have to figure out the work around or decide if it is worth the trouble.

 

[ptsg]

Awesome. Thanks for your knowledge. Very helpful! I’m curious about the data logger. I followed a similar post and I thought it was resolved, the user forgot to plug something in..? If that’s the same thread you speak of. I’m going to keep digging, see if I can find something In Australia as you said. I’ll keep my findings posted. I’m sure I’m not the only one wanting a factory bolt on mod. Worst case I’ll fabricate but again thanks for quick response!!

Yes, I think that's the thread. I'm sure it's easily fixed with some simple rewiring, but then again, we would need the service manual.

A factory bolt on would indeed be great. Other people are also just gutting the DPF and not mess with anything else, which I think causes the light at the dash to flash but they just ignore it.

On the 15 series, the models that use the A1700 engine, could simply buy the muffler from the 2515 and be done with it.

 

[Slowpoke Slim]

I also think that in the new version of the data logger wiring, that disconnecting the data logger will disable the tachometer. I wouldn't want to run around without a temperature gauge, but running without a tach would also be a no-go.

I think you could still "gut" the filter and put it all back together. I think the guys that have done that report back that the dpf fault light never comes on.

Ideally though, a more elegant fix would be to bolt on a muffler. We just need the wiring schematic and for someone to go through the mod and figure out what needs to be done. Proof of concept says it will still work (no functional emissions system and the engine still runs), we'd just have to figure out the specific work around for the wiring harness.

 

[Hombre]

My Branson is a bit older, 2016 4020R, I gutted the DPF at around 60hrs as it was giving me issues even at that point (winter time). The DPF fault light comes on and flashes for a few seconds on start up and then goes away, doesn't come back on except at startup. I do get smoke on start up when engine is cold and maybe a small "puff" when giving it a shot of power when working, not unlike my Dodge Cummins will. Tractor smokes much less however and doesn't continue to "roll coal" like the modded truck will.

 

[K5lwq]

We need a wiring diagram to figure it out. I don’t know if the service manual has been written yet or not for the new models.

In the meantime it will not hurt for the lights to be on.

 

[Dalex3460]

I'm not sure exactly what the check engine light monitors or what sets it off rather, I just want to make sure that if something else happens, non dpf related, then it can light up and give me a clue that I need to look at something else that may be wrong.

 

[K5lwq]

I'm not sure exactly what the check engine light monitors or what sets it off rather, I just want to make sure that if something else happens, non dpf related, then it can light up and give me a clue that I need to look at something else that may be wrong.

The gauges will tell you if there is a problem. Once you unplug the data logger the check engine light will no longer work. There is no ECM to monitor other engine functions. That is why the engine still runs good with the light on now. If you had a ECM it would put the engine in derate mode and you would have reduced power.

Once the wiring diagram is available you will be able to find where a jumper wire needs to go so that the gauges work with data logger unplugged.