TomSeller
Super Member
I recently bought a used B21 for a very good price. When loading it I noticed the hydraulic fluid foaming and coming out the overflow tube in the rear. I thought I had it troubleshot to an intake tube on the hydraulic pump sucking air and tightened that. All was good and I filled it with about 1/2 gallon of SUDT after getting it home. Loader is strong, backhoe is strong, HST strong enough to stall the engine. Good power and starts well. 1600 hrs.
This afternoon when warming up the tractor for about 20 min, I found the foaming condition back. We just had a rain and wind storm but you can see the oil and foam on the ground. Much of the foam had dissipated by the time I took the pictures. Fluid appears to be clear when foam subsides. I have never had problems with foaming while simply warming up a machine, I had it in range with the brake on to warm up the fluid faster. I filled it up to the top mark on the dipstick.
Would a poor quality oil foam on warm up? ie engine or gear oil? I don't know what the owner put in the transmission tank. Any other reason the fluid would foam and spill on these B21s? I did not see anything in the owner's manual about doing anything special when filling the transmission so as to not overfill. It filled normally to the high mark. My knee-jerk reaction is to drain it, change filters and fill in with SUDT.
This afternoon when warming up the tractor for about 20 min, I found the foaming condition back. We just had a rain and wind storm but you can see the oil and foam on the ground. Much of the foam had dissipated by the time I took the pictures. Fluid appears to be clear when foam subsides. I have never had problems with foaming while simply warming up a machine, I had it in range with the brake on to warm up the fluid faster. I filled it up to the top mark on the dipstick.
Would a poor quality oil foam on warm up? ie engine or gear oil? I don't know what the owner put in the transmission tank. Any other reason the fluid would foam and spill on these B21s? I did not see anything in the owner's manual about doing anything special when filling the transmission so as to not overfill. It filled normally to the high mark. My knee-jerk reaction is to drain it, change filters and fill in with SUDT.
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