B7510 HST Surges/Jerks

InTheWoods

Active member

Equipment
B7510/FEL, B7100D, ZD18, ASK-R130
Nov 17, 2023
190
128
43
Indiana
I've had this tractor for a bit over a year. It has 1000 hours. It seems to surge when I take off slowly. From a standstill, I can push the forward pedal a little and it moves evenly and slowly, then once I get to something like 20% pedal, it surges, i.e. jerks a bit. Same in high and low range. Not a massive jolt, but definitely noticeable.

It's behaved this way since I've had it and doesn't seem to be getting any worse. New Super UDT2 and filters made zero difference. The fluid looked clean when I drained the old stuff out.

Common? Red flag? Any thoughts?
 
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