Bob Bancroft
Well-known Member
- Location
- Aurora NY
A recent question on a D17 IV hydraulic valve operation got several responses, each quite different.
I based my response on the recollection of operating a semi-mounted plow on a 185. The rear end of the plow would always take priority over the front.
I just bought a 175, and making the assumption that it operates the same as a D17 IV, I just experimented with it. If either remote is held against the relief valve, the three point is dead. Either remote running an orbit motor kills the three point.
There is no priority valve, nor any kind of apportionment so far as I can see. The farthest left valve operated in the stack gets all the flow, until it is cancelled. Then, apparently all return flow is directed to the sump, rather than being available to power any valve "beyond".
I based my response on the recollection of operating a semi-mounted plow on a 185. The rear end of the plow would always take priority over the front.
I just bought a 175, and making the assumption that it operates the same as a D17 IV, I just experimented with it. If either remote is held against the relief valve, the three point is dead. Either remote running an orbit motor kills the three point.
There is no priority valve, nor any kind of apportionment so far as I can see. The farthest left valve operated in the stack gets all the flow, until it is cancelled. Then, apparently all return flow is directed to the sump, rather than being available to power any valve "beyond".