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Hydros jerk when slowing down
#1
Gone Fission
Gone Fission
I recently bought a 2006 Bush Hog zt25 with 750 hours. May have been made by Grasshopper? It has a 25 hp Kohler command, 60" cut and hydrogears are BDP 10L-117P.
I cut with it 3 hrs and find it jerks badly when trying to go around trees or changing directions but drives ok going forward. Seems like I can't slow down or turn without wheel(s) locking up. No difference left or right. Almost throws ya out of the seat. Hydros sound normal, no strange noises.
What I've tried:
Purged hydraulics.
Replace pump drive belt.
Try a stronger idler spring on drive belt.
Install new Hyd filter.
Purged hydraulics again.
20w-50 is full and looks good.
Check steering dampeners, still fairly tight.
Steering linkage good.
Noticed on hydro pump input shafts, the control arms have about 1/4" play back n forth. Replaced roll pins but it didn't tighten up any. Don't know how much it contributes to the problem.
What else can I do?
I cut with it 3 hrs and find it jerks badly when trying to go around trees or changing directions but drives ok going forward. Seems like I can't slow down or turn without wheel(s) locking up. No difference left or right. Almost throws ya out of the seat. Hydros sound normal, no strange noises.
What I've tried:
Purged hydraulics.
Replace pump drive belt.
Try a stronger idler spring on drive belt.
Install new Hyd filter.
Purged hydraulics again.
20w-50 is full and looks good.
Check steering dampeners, still fairly tight.
Steering linkage good.
Noticed on hydro pump input shafts, the control arms have about 1/4" play back n forth. Replaced roll pins but it didn't tighten up any. Don't know how much it contributes to the problem.
What else can I do?
#3
Gone Fission
Gone Fission
Yeah the dampeners are strong and still self center. And they are over $115 each now.
