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4.2.1 REGULATING HYDRAULIC FLOW TO THE ACE SPRAYER PUMP
WARNING: FAILURE TO REGULATE OIL FLOW WILL CAUSE MOTOR FAILURE
There are three general types of hydraulic systems: 1) Load Sensing, also known as Pressure- Flow Compensating
Closed Center (LS), 2) Pressure Compensating Closed Center (PC), and 3) Open Center (OC). The flow of
hydraulic oil is regulated in a different manner for each type of hydraulic system. Consult the Tractor Hydraulic
System Pump Selection Guide or your tractor dealer to determine the type hydraulic system on your tractor. For
each type hydraulic system, a different method of regulating hydraulic flow to the motor is used.
SHUTOFF PRESSURE
Shutoff pressure is the sprayer system pressure with all flow turned off. This means closing the boom, agitation, and
any bypass valves. It is the highest pressure a centrifugal pump will achieve for a given RPM and relates directly to
the flow of hydraulic oil. Use the pressure gauge located on the pump.
Maximum Shutoff Pressures:
FMC-150-HYD-206 =Nominal 100 PSI (Max 120 PSI)
FMC-200-HYD-310 = 80 PSI
LOAD SENSING CLOSED CENTER SYSTEM (LS)
Regulate oil flow with tractor’s FLOW CONTROL and/or FLOW LIMITER.
(Do not use restrictor orifice.)
Setup Instructions:
1. Install the flow limiter in the motor inlet port, if not already installed.
2. Close the motor needle valve: loosen jam nut, screw needle valve clockwise until
seated, and lock jam nut.
3. Shut off the sprayer boom and agitation valves.
4. Adjust the tractor flow control to the minimum flow setting (turtle).
5. Move the hydraulic lever to “Lower/Retract” position to start the pump.
6. Adjust the tractor flow control until the sprayer shutoff pressure is just below the
maximum shown in the SHUTOFF PRESSURE section above. Note: If the flow
limiter stops oil flow to the motor: 6a) Move hydraulic lever to “Float” or “Neutral”
to remove oil pressure from the flow limiter. 6b) Adjust the tractor flow control to a
lower flow position. 6c) Repeat steps 5 and 6.
7. Open the sprayer agitation valve to get the desired agitation flow.
8. Fully close the electric regulating valve.
9. Turn the electric ball valves on and adjust the throttle valve to have 30 psi more
pressure at the spray tips than will be used when spraying in the field.
FLOW LIMITER
The flow limiter is a hydraulic device designed to shut off the flow of hydraulic oil when a specified flow is exceeded.
On tractors with LOAD SENSING (LS) Closed Center hydraulic systems, this device limits the flow of oil to the Ace
motor and prevents failures due to misapplication.
The new tractors present a great potential to turn the motors beyond their rated speeds. The flows out of the hydraulic
valves can exceed 29 GPM while the motors are rated at 4-11 GPM. The flow limiter protects the Ace motor by
shutting off when hydraulic flows exceed the motor’s capacity.
The flow limiter should not be used on OPEN Center or PRESSURE COMPENSATING Closed Center Hydraulic
systems. The flow limiter should not be used with a restictor orifice.
Flow Limiter
Flow Control
Summary of Contents for SB4000
Page 1: ...SB4000 SUSPENDED BOOM SPRAYER Part No B012920 Rev 14 Effective Mar 2009 OPERATORS MANUAL...
Page 5: ......
Page 107: ...96...
Page 136: ...125 8 SPECIFICATIONS FIG 8 1 MACHINE DIMENSIONS FOR SB4000 SPRAYER TRANSPORT POSITION...
Page 137: ...126 FIG 8 2 MACHINE DIMENSIONS FOR SB4000 SPRAYER FIELD POSITION...
Page 144: ...133 Notes...
