Delavan M125 - Manual (Page 5)

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Document HD Magnum Install 3.15.06
Hydraulically Driven Centrifugal Pumps
5
Typical Flow Control
for Closed Center
(LS) Systems
Closed and Load Sensing Operation
1. With the pump installed on the sprayer (as shown in the
Plumbing Recommendations illustration on the facing
page), fill the pump with liquid by opening the inlet ball
valve.
2. Connect the hydraulic hoses to the remote outlet on the
tractor. Use the motor remote outlet if your tractor has
one.
3. Adjust the flow control on the tractor remote outlet to the
lowest flow position. Failure to start in the lowest flow
position could damage the pump and void the warranty.
4. Open the agitation line all the way open and and open
the boom control valves. Start the tractor and increase
the engine speed to the desired speed used when
spraying. Engage the hydraulic remote to start the
pump. At this time, make sure the pump is primed.
5. Adjust the sprayer pressure. Turn off the agitation line
and with the boom control valves open, adjust the flow
control to get the desired spraying pressure. Do not
exceed the sprayer pump pressure rating.
6. Open the agitation line until the desired agitation is
achieved.
7. Readjust the spray pressure by adjusting the hydraulic
flow control on the tractor.
Open Center Operation
1. With the pump installed on the sprayer (as shown in the
Plumbing Recommendations illustration on the facing
page), fill the pump with liquid by opening the inlet ball
valve.
2. Connect the hydraulic hoses to the remote outlet on the
tractor.
3. If the pump is model M200-39070-2 being used with a
large open center system with a flow rate over 15 GPM,
then open the bypass screw on the on the side of the
motor two turns.
4. Open the agitation line all the way, and open the boom
control valves. This will assist the pump in priming.
5. Start the tractor and let the engine run at idle.
6. Increase the engine speed to the desired speed for
spraying.
7. Close the agitation line until the desired agitation is
achieved.
8. Adjust the spray pressure with the boom control valve.
9. If using the bypass screw on the motor, close the bypass
as much as possible without exceeding the desired
maximum spraying pressure or the rating of the pump.
On some open center systems, operation of the sprayer
pump will lower the system pressure to a point where the
attempted operation of additional hydraulic implements
at the same time results in poor operation of both. In this
case, one of the functions will have to be turned off to make
the other one work correctly.