New Branson 4220 engine rattle: Other Tractor Brands  -- Other Tractor Brands Discussion Forum and Review New Branson 4220 engine rattle: Other Tractor Brands -- Other Tractor Brands Discussion Forum

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 03-25-2008, 09:53 Post: 152388
RanchGal



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 New Branson 4220 engine rattle

Just Got a new 4220i (42 hp) 4 cyl.) 17 hours now.
Starts fine runs good, however between 1300 and 2100 rpm the engine sounds like it has a loose bolt rattling around in the engine. Some might call it clatter. I called the dealer and he said that if you already have run it for 17 hours, if it had a serious engine problem it would have already blown up. I wonder if this noise is normal?
Thanks,
RanchGal






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 03-25-2008, 10:10 Post: 152390
greg_g



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 New Branson 4220 engine rattle

That was a p-poor response from the dealer. Is he the only game in town, or does he just live with a poor referral rate?

Anyway, I'm going to assume your Branson doesn't have electronic fuel injection. As such, you'll have mechanical injectors, which can get noisy. It's an easy possibility to confirm or eliminate. You simply cut off the fuel to each injector - one at a time. The engine will clearly tell you when you've disabled a good injector. But if you disable one - and the engine doesn't sound any different - you've found a bad one. Good news is that - on such a new tractor - it just might be dirty.

//greg//






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 03-25-2008, 10:45 Post: 152391
RanchGal



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 New Branson 4220 engine rattle

The strange thing is that at idle and up to 1200 rpm it purrs like a kitten and if I boost the rpm to 2200 or higher it sounds fine. There is no loss of power at any rpm even when it making the rattling noise. I read other discussion boards and gathered that this could be explained as "breakin misfire". I hate to make any changes to the engine or play with the injectors as the warranty should cover any/all problems at this point and I don't consider myself much of a diesel mechanic.
thanks for your response.
RanchGal






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 03-25-2008, 13:36 Post: 152399
greg_g



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 New Branson 4220 engine rattle

Three out of the last four tractors I've owned were bought new - I broke them in myself. This is the first time I've
EVER heard of "break-in misfire". Somebody's yankin' your chain.

Mechanical injectors work on fuel pressure that is developed by the injection pump. There are compression springs inside the injectors that are tripped with a specific fuel PSI. That's what causes the aerosol that eventually detonates in the cylinders. The sequence in which they trip constitutes firing order in a diesel.

Yours is a four cylinder. At low rpms you may not detect the difference between 3 cylinders and 4 cylinders firing. 1200 on a diesel isn't much more than a fast idle, barely even touching the working range of the engine. By 2200 perhaps the pump is working hard enough to actually trip the recalcitrant injector - the engine smooths out.

I'm not saying this is the problem. My only point is that this is ONE of the things that can cause excess "clatter" on a diesel engine. The test to eliminate an injector issue is so simple, there's no reason NOT to take the 15 minutes required to perform it. If it reveals all 4 injectors working fine, you move on to the next possibility.

But - this REALLY may be a warranty issue. Judging by your opening post, any troubleshooting attempts on your part could be used against you by that lazy dealer - who may argue that your meddling with the engine is what caused the problem in the first place. I'm sorta inclined to take the guy to task. Make THEM satisfy YOU.

//greg//






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 03-25-2008, 17:03 Post: 152408
kthompson



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 New Branson 4220 engine rattle

I am not a mechanic but: did it made this noise from the very first? did you hear it run before you bought it and did it make it then? does the dealer have another you could listen to and see if it makes the same noise? has anyone else listened to it and noticed it? are you sure it is coming from the engine and not say the hyd pump but if it is that does not mean that is normal. have you looked the tractor over to see if there is any obviously loose bolts or part?

You have checked the oil levels?

I agree with Greg, I would not just let the dealer slip by on my concern. Only thing is if it is totally normal they may have a charge for checking it. Depending on the dealership you may be able to talk directly to a mechanice and they probably would give you a direct answer. Wish you well. kt






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 03-25-2008, 17:11 Post: 152410
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 New Branson 4220 engine rattle

Another thought hit me, is it possible the noise is only when the engine is cold and you are not noticing it at the higher rpm as it warms up quicker there? or it may not be getting very warm at all at the rpm level you are hearing it at depending on the temp and what you are doing.

My small Kubota can rattle when it is cold and the temp is probably below 40. But it smooths out as it warms. kt






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 03-25-2008, 17:18 Post: 152411
kwschumm



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 New Branson 4220 engine rattle

Have you tried any fuel additives to see if it changes? You might try adding a little Power Service additive.






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 03-25-2008, 21:36 Post: 152422
RanchGal



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 New Branson 4220 engine rattle

This started from the get go with 2 hours on it. So what I have been doing is just running it at 1200 rpm with no noise or if I get anxious I run it at 2300 to 2600 rpm with no noise. The dealer said he was going to see if another new 4220 tractor did the same thing, but I think this was the only 4220 on his lot. I did drive it before I bought it, but not at higher than 1200 rpm.
Warm/Cold same thing here in Texas it's been around 70 and it warms up pretty quick.
All the fluid levels are full.
Tomorrow, I will look at it closer and try to turn off the fuel to each cylinder like greg suggested and if that doesn't expose a bad injector then I think I might try using some farm diesel or an additive and see what happens.

If all fails then I will have the dealer do the 50 hour fluid changes and fix it or replace it. Only problem with that is that I bought from this dealer because he gave me the best price and he is 120 miles away. The closer dealers (30 miles and 44 miles) couldn't beat his price and deliver it.

Will let you know
Thanks,
RanchGal






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 04-04-2008, 21:24 Post: 152750
CoyD1968



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 New Branson 4220 engine rattle

I have a new 3820i it sounds the same at mid range, before 2,100 have you found anything out yet. I only have 21hrs on my machine. Thanks






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 04-04-2008, 23:18 Post: 152751
greg_g



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 New Branson 4220 engine rattle

Diesels by nature have a rattling/clattering sound to them, so maybe we're chasing a non-problem here. Let me ask if this is the first diesel either of you have owned?

//greg//






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Discussion Boards > Active Subjects > Messages as Posted > Other Tractor Brands Forum

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