We're experiencing a strange problem with my 800C.
After working it for a bit and it warms up, it starts to slow down on all hydraulic functions, including swing and travel, until after an hour or so it's so slow it only makes sense to stop digging. It's as if something is wrong with the pilot control system? As described by the operator, it's like every function is "governed down", and the longer you work it, the slower it gets.
So far, we've changed all the hydraulic filters, I've swapped the regulators from one pump to the next, and replaced the vehicle controller just yesterday. Also, there are no trouble codes being shown by the LED indicator.
This machine runs fine, engine wise, and no obvious problems with the pump - pressures are normal and there's no noise or metal shavings in the filter or anything of that sort.
It's not an engine problem, because the motor runs perfectly, no surging or anything of the sort.
I can't see it being that the pumps get weak simultaneously, as these machines have two pumps, each of which supply a travel motor, so when one goes or a regulator sticks, etc., it usually creeps to one side badly, and it's not doing that.
I'm starting to think it's the pilot pump going bad, but I'm not sure I want to just keep throwing new parts on it to see what fixes it.
We've been chasing this ghost for weeks now, so any help would be appreciated. Thanks!
After working it for a bit and it warms up, it starts to slow down on all hydraulic functions, including swing and travel, until after an hour or so it's so slow it only makes sense to stop digging. It's as if something is wrong with the pilot control system? As described by the operator, it's like every function is "governed down", and the longer you work it, the slower it gets.
So far, we've changed all the hydraulic filters, I've swapped the regulators from one pump to the next, and replaced the vehicle controller just yesterday. Also, there are no trouble codes being shown by the LED indicator.
This machine runs fine, engine wise, and no obvious problems with the pump - pressures are normal and there's no noise or metal shavings in the filter or anything of that sort.
It's not an engine problem, because the motor runs perfectly, no surging or anything of the sort.
I can't see it being that the pumps get weak simultaneously, as these machines have two pumps, each of which supply a travel motor, so when one goes or a regulator sticks, etc., it usually creeps to one side badly, and it's not doing that.
I'm starting to think it's the pilot pump going bad, but I'm not sure I want to just keep throwing new parts on it to see what fixes it.
We've been chasing this ghost for weeks now, so any help would be appreciated. Thanks!
Deere 800C - loss of hydraulic power
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