Great Plains 3P-FF900 Predelivery Manual - Manual (Page 15)

Preparation and Setup 13
11/09/2006 500-643Q
Ace Pump Flow Limiter
Refer to Figure 7
The flow limiter is a hydraulic device designed to shut
off the flow of hydraulic oil when a specified flow rate 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.
Newer Case-IH, John Deere, New Holland, and CAT
tractors have a great potential to run motors beyond
their rated speeds. Flows out of the hydraulic valves
can exceed 20 GPM while the motors are rated at 4-11
GPM. The flow limiter protects the Ace motor by shut-
ting off on excess hydraulic flow.
The flow limiter should not be used on OPEN center or
PRESSURE COMPENSATING Closed Center hydrau-
lic systems. The flow limiter should not be used with a
restrictor orifice.
To Install Pump Flow Limiter
1.
Install the flow limiter in the inlet port of the Ace
motor.
2. Connect the hydraulic hoses so that the pump
runs with the hydraulic lever in the “Lower/Retract”
position. Connect return hose to Low Pressure
Return Port, when available.
3. Shut off boom and agitation valves on the sprayer
to deadhead the sprayer pump flow.
4. Adjust the flow control on the tractor to minimum
flow setting (turtle).
5. Move hydraulic lever to the “Lower/Retract” posi-
tion.
Note: Always shut the pump off in the “Float” position.
This eliminates high pressure being trapped in
the return line and protects hydraulic seals. Avoid
returning the oil to the remote valve; use the Low
Pressure Return Port, when available.
6. Adjust the flow control on the tractor until the
sprayer system deadhead pressure is within the
pump’s operating parameters:
Note: If the flow limiter stops the flow of oil to the motor
a. Move the hydraulic lever to the “Neutral” posi-
tion. This removes the oil pressure from the flow
limiter and allows it to reset.
b. Adjust the flow control to a lower flow position.
c. Repeat steps 5 and 6.
7. Set sprayer pressure by opening the agitation valve.
Figure 7
Ace Pump Flow Limiter
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