Hi, new, not new to forum, it's been awhile, i guess all my log in stuff got deleted. i have a Branson 4520r, i bought new in 2016, to date i havn't had a single problem with it. and i guess i still don't. but ever since it was new, when i start it up cold, it starts right up but it stumbles and sounds terrible for a few seconds. then smooths out. but the engine rattles somthing awful, and it never stops. nobody i knows tractor sounds like that, and it's pissing me off. i'm thinking it's a lean issue, or a timing thing. anybody have the same issues ? would sure like to get this resolved once and for all. just got done changing the fluids, and filters, and decided to remove that god awfull fowl smelling can, and install a muffler. i just test drove it. didn't seem to change anything except now it smells like a diesel engine. now i need to get it to sound like one. imput would be greatly appreciated. thanks, TIC.
rattleing engine
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seville009
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This may sound simplistic, but are you sure that the rattling sound is not from something that is just lose somewhere?
does the rattle change with the rpm's or tractor movement?
can you pinpoint more precisely where the rattling is coming from if you walk around it, etc while it's idling?
does the rattle change with the rpm's or tractor movement?
can you pinpoint more precisely where the rattling is coming from if you walk around it, etc while it's idling?
5030
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Diesels all rattle, some more, some less. it's the sound of compression ignition. The higher the base compression ratio is, the more pronounced the 'rattle' is.
i have a distant neighbor with a 3520R 3 cylinder, nice tight sounding engine. not mine, start up is rough, all that internal mechanical noise, been waiting for warranty to expire, i'm gonna keep digging till i can come across a good diesel mechanic that knows his stuff, there are a lot of adjustments that can be made to smooth things out. been working on gas engines since i was 10, but not so much on diesel, i know my limitations, so i'm not messing around till i can get some reliable solid info.
it's the internals of the engine, ive heard it on other diesel engines in the past, you know when you put the wrong octane in your car, and you pull a hill and it starts rattleing, and they call it diesel ing. thats the noise, i'm sure it can be solved by making adjutments. i don't have enough knowledge on the subject yet, to go messing around with adjustments yet, but i'll keep digging.
abranz
New member
I have a 3620r and it has a rattle sounding like a box of loose bolts/nuts when rpm is greater than 2000. Sounds fine at idle and doesn't change while depressing the clutch. Has done it since new. Different oil grades make no difference. Doesn't burn oil, valve clearance is within spec, and otherwise functions normal so I'm going to run it.
ptsg
Super Member
That's seems to be pretty common for the A1700 engine. Some people notice, others swear theirs won't do it but I believe all A1700 engines does it. The noise does go away under load, which makes me wonder if it's just something on the governor inside the injection pump.
Mine does the same and also the clutch makes some noise sometimes but so far, so good.
In this case, the OP has a 4520 which should have the 4 cylinder A2000 or A2300 engine. I don't think those engines make the same rattle noise of the A1700.
the more i look into it, the more i'm convinced it's a timing issue. it's not just the rattle, but when i start it cold it coughs, sputers into life, and puts out white smoke, for a few seconds, then smooths out. has done that since the the day it was brand new. when it's warmed up, it starts right smooth. but the rattle is always there. at every rpm.
LS Tractor Owner
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Without hearing it, it just going to be guesses.....
Diesels rattle. Starting cold, a small puff of smoke is normal. Sputtering is normal until all cylinders fire, especially when cold.
Diesels rattle. Starting cold, a small puff of smoke is normal. Sputtering is normal until all cylinders fire, especially when cold.
i understand what your saying. i've heard other engines making same clattering. but i friend has a 3120. his don't do any of that. also i'm around a mahindra, and kubota. and there's don't have any of these issues. so i'm not gonna let it go, when i get the time. i'm gonna try moving the timing a little and see what happens.
YanmarFever
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Perly, any follow up on the rattle ?
Did you find a cure?
Did you find a cure?
HawkinsHollow
Veteran Member
I have a 2018 3015R and the engine noise is quite significant as well. It is a little unnerving at times, but with 255 hours it has been rock solid. So I am rolling with it.
bcs001
Silver Member
My 3620H has had this same engine rattle since day 1 when I purchased new and currently have 200hrs with no change to sound. Ive also spent time searching for answers/explanations as to if it is "normal" and so far the answers have been very similar to the responses in this thread. The one time I had it back to the dealer for a warranty water pump replacement, the mechanic said it was just like all the others they have sold. I have read some ambitious owners have dug into timing and valve clearances with limited results so for now I'm just monitoring info and using it as hard as needed.
LindenBruce
Gold Member
My 4520R sounds like it's going to fly apart at any moment. Has since the day I got it. Now nearly 200 hours in and still runs great. Just noisy as hell. B.
ericm979
Super Member
IDI combustion chambers like our engines use are known to make noise.
YanmarFever
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My 4520R sounds like a bucket of chestnuts with a microphone inside.
It sure runs good and does everything I need it to do. Heck, I even wax it once a year..
It sure runs good and does everything I need it to do. Heck, I even wax it once a year..
LuckiestManInIdaho
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I have a 2515R with a knocking noise that was there from day one. However, I did not discover it until I had the tractor home and put it to work with a brush hog mower. Then I needed to up the rpm to PTO range and at around 1700 RPM the noise was very noticeable. I plan to address it at some point, but my dealer was a satellite of company in Oregon and folded up shop a year ago - so no help there. I did find this uTube with the identical noise on a 3520H that the owner was able to resolve. He got permission from his dealer (still under warranty) to pull the valve cover and check/adjust valve clearance. He found one valve cap loose in the head! He fixed that and adjusted the valves - noise is gone. Nice video:
I plan on pulling the valve cover when the weather is warmer and the tractor is idle. Yes, I still have a year+ of warranty left, but no dealer nearby, so I'll fix it myself. If that fails to fix it then I'll check timing. Hope this helps.
I plan on pulling the valve cover when the weather is warmer and the tractor is idle. Yes, I still have a year+ of warranty left, but no dealer nearby, so I'll fix it myself. If that fails to fix it then I'll check timing. Hope this helps.
