I drove a Ingersoll Rand BL-275 and the transmission seemed to make a whining sound when moving forward?
It did not make this noise in reverse. This was a backhoe that I went to look at on Craigslist, and I do not own it. I was just wondering what might be causing the noise? I know that the transmission is hydrostatic. Thank you for looking.
Hydrostats are a little noisier than others, but since you noticed a difference between forward and reverse, says something’s not right. It could be a pump either cavitating from wrong hydraulic oil or filter plug up, or just wear. There should be a test port, on the control valve for hydraulic pressure, which you could monitor with a test gauge, looking for needle bounce when it’s under load and hot, with a noticeable jump. Unless the price is really great, think a bit before you purchase it, because these babies are a little pricey to overhaul. My question would be, why is it up for sale?
John Deere Compact Tractor Hard Sided Deluxe Cab. Fits John Deere 3120, 3320, 3520, 3720, 4210, 4310, 4410. 1JD3520AS
Available in both hard side and soft side models. Hard roof with acoustical headliner. 12 volt heavy duty electric wiper. Molded automotive style safety glass front windshield with pop open vent feature. Hard doors feature deluxe sliding windows. Pin-hinged doors for easy removal in seconds. Hard rear glass panel is available optionally for soft sided. Hard cabs feature a hard glass rear panel sta…