Loader B2320 “Whistle”

   / B2320 “Whistle” #1  

Stubee

Silver Member
Joined
Sep 8, 2008
Messages
155
Location
Mid-Michigan
Tractor
LX-176 (not really a tractor)
I’ve got a B2320 HST, FEL. Had it about 7 years and it’s maintained and sees little use, mostly bush hogging and FEL pushing and lifting when I trailer it 800 miles to my hunt property in NW ONT. It’s only got about 130 hours and has been pretty much flawless.

Today I was simply running down my gravel road at camp in High, about 2000 rpms, going to hand cut stuff the tractor can’t get to. Had cruise control on and about 1/4 mile on I suddenly heard what sounded like a low pitched “whistle”. I’m wearing ear plugs and headphones but this was sudden and got my attention. It didn’t sound like grinding but whistling. I hit the accelerator to kick off cruise and it kept up, and I noted it changed with the throttle. I immediately stopped, the ‘whistle’ had stopped before I hit idle and I kept it running as temp was not hot at all (not even to low middle of the gauge) and looked things over. I had a hand brush cutter strapped to the back blade but that wasn’t hitting anything, only thing I’d noticed was that I still had it in 4WD and I usually don’t when just traveling on gravel. Took it outta 4WD, continued on to woods, back into 4WD in woods at low speed, no ‘whistle’. Oil level, HST fluid fine. Did my work and headed back in High but 2WD, 2000 rpm and hit throttle up and down on way, no whistle. No sign of a coolant leak etc, nothing amiss and the machine looks and acts nearly new til now even though it’s work is in the woods.

I wondered if running in High at a pretty good speed in 4WD would give a gear whine that would get my attention like this did? I’m trailering it back home in a couple days but do want to run a mile + down the gravel road tomorrow to finish some more hand cutting. Thanks for any info.
 
   / B2320 “Whistle” #2  
Whistle on radiator overflow tube...?
 
   / B2320 “Whistle”
  • Thread Starter
#3  
I couldn’t find anything in the cooling system or anywhere else for that matter, nor a slipping belt. I ended up driving it over a mile each way down the same road in 2WD in H, 1500-2200 rpm, accelerator pedal from low to maxed, in and out of cruise and used 4WD off the road in the woods. No “whistle”. The whistle might more accurately be a “whine”, BTW. Hard to tell with with muffs on.

All I can guess is that I was hearing some front gear noise running in 4WD at a pretty good clip, e.g. traveling down the road at speed. It did first appear right as I bumped the rpms up from 2000+ with the pedal down. I’ve not run that fast in 4WD before and though it’s in 4WD most of its life that’s at low working speeds. I’ll maybe test for the same noise when I get some time but was pretty busy getting things done when it happened. IMG_0280.JPG
 
   / B2320 “Whistle” #4  
I was rototilling food plots last week with my b2650 and at one point I needed 4wd. I finished a plot and got back on the gravel road in high mode to quickly get to the next plot. I noticed a whine (whistle?) running down the road and noted to myself that I had a new noise that I needed to investigate. At the next plot I figured out I was still in 4wd and moved to 2wd. After that plot, I ran to the next plot in 2wd in high and noted the noise was gone. Perhaps you were hearing the noise of additional gears turning?
 
   / B2320 “Whistle”
  • Thread Starter
#5  
I was rototilling food plots last week with my b2650 and at one point I needed 4wd. I finished a plot and got back on the gravel road in high mode to quickly get to the next plot. I noticed a whine (whistle?) running down the road and noted to myself that I had a new noise that I needed to investigate. At the next plot I figured out I was still in 4wd and moved to 2wd. After that plot, I ran to the next plot in 2wd in high and noted the noise was gone. Perhaps you were hearing the noise of additional gears turning?

That’s what I’m thinking. I was surprised that it seemed to come on so suddenly & noticeably. Stopped by the dealer on the way home and they concurred with “just gear noise”.
 
   / B2320 “Whistle” #6  
That’s what I’m thinking. I was surprised that it seemed to come on so suddenly & noticeably. Stopped by the dealer on the way home and they concurred with “just gear noise”.

My B7800 makes a "whistle" type noise in 4WD under certain condition. Actually more of an odd whine. Sounds similar.
 
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