Regulating Hydraulic Flow - Oasis Ace MAX Series Instruction Manual

REGULATING HYDRAULIC FLOW TO MOTOR
Warning: Failure to regulate oil flow may damage hydraulic motor.
There are three types of hydraulic systems: 1) Load Sensing (LS) also called Pressure-Flow
Compensating Closed Center, 2) Pressure Compensating Closed Center (PC), and 3) Open Center
(OPEN). Consult the Tractor Hydraulic System Pump Selection Guide(HSG), Internet Hydraulic
Selection Guide (IHSG) at www.AcePumps.com, or your tractor dealer to determine the type hydraulic
system on your tractor and the method of regulation.
LOAD SENSING CLOSED CENTER SYSTEM
Regulate oil flow with tractor's FLOW CONTROL. (Do not use restrictor orifice.)
Setup Instructions:
1. Shut off sprayer boom and agitation valves.
2. Adjust tractor flow control to minimum flow setting (turtle).
3. Move hydraulic lever to "Lower/Retract" position to start pump.
4. Adjust tractor flow control until sprayer shut-off pressure is 4 psi(0.3 bar) for 650
models or 20 psi(1.4 bar) for 750/855 models above desired spraying pressure.
Do not exceed maximum shown in SHUT-OFF PRESSURE section below.
5. Open the sprayer agitation valve to set desired spraying pressure.
SHUT-OFF PRESSURE
Shut-off pressure is the sprayer system pressure with all liquid flow turned off. This means closing
the boom, agitation, and any by-pass valves. It is the highest pressure a centrifugal pump will
achieve for a given RPM and relates directly to the flow of hydraulic oil. A pressure gauge must
be located between the pump discharge and the shut off valves.
Pump Model
FMC-650-HYD
FMC-650F-HYD
FMCWS-650F-HYD
PRESSURE COMPENSATING CLOSED CENTER SYSTEM
Regulate oil flow by using a RESTRICTOR ORIFICE.
Setup Instructions:
1. Install restrictor orifice for all 650 models. Insert the orifice with O-ring
inside the adapter/restrictor body in the motor inlet port.
Note: Do not use restrictor for 750 and 855 pump models.
2. Set "Rabbit/Turtle" flow control to "Turtle".
3. Move hydraulic lever to the "Lower/Retract" position to start pump.
4. Adjust "Rabbit /Turtle" flow control and sprayer agitation valve to set
desired spraying pressure.
OPEN CENTER SYSTEM
The M Series motors are not equipped with a needle valve to bypass excess oil flow. The tractor
hydraulic flow must fall within the motor's recommended flow range or an external bypass circuit
may be added. The tractor's hydraulic system may limit pump performance if the oil flow is less
than the motor's rated capacity.
Select motor size closest to tractor's hydraulic system capacity.
Consult factory for application of pumps on these systems.
Maximum Shutoff
160 psi (11 bar)
160 psi (11 bar)
160 psi (11 bar)
Pump Model
FMC-750F-HYD
FMC-855F-HYD
7
Flow Control
Maximum Shutoff
150 psi (10.3 bar)
150 psi (10.3 bar)
Insert Restrictor
Orifice