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396
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5477Y1 Sentinel Row Control Manual
©2022 SurePoint Ag Systems 55
4/29/2022
Pre
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season Service
(A little time spent here may prevent some downtime when you want to be rolling.)
1.
Visually check entire system (hoses, fittings, harnesses, etc.) for any signs of wear or
trouble.
2.
On the display, recheck all setup screens (see Section F) to verify correct setup.
3.
Fill system with water and run in Manual mode (Section Test or Calibrate PWM Limits) to verify compo-
nents and system are in working order. (May need to open air bleed valve to prime pump the first time. Be
sure air bleed tube is not plugged.)
4.
Clean out the dirt that may be packed in to the manual override knob on the hydraulic valve block.
5.
If necessary run pump in manual override mode to check hydraulic setup (see page 39).
6.
Tighten all clamps. Loose clamps may be evident by leaks on the output side of the system. Loose
clamps from the tank to the pump are not always apparent, but can be sources of air getting into the sys-
tem which can create issues.
7.
Push in tubes at all Quick
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Connect fittings so they are seated tightly. Tubes that are not fully seated are
not always obvious, but may allow air in, which can cause check valves to leak.
8.
Remove the black cap from the top of each check valve. Check the diaphragm to be sure it is intact and
not gummed up with residue. Look under the diaphragm for debris. Compress the spring in the cap to be
sure it moves freely. Carefully replace diaphragm and tighten cap.
9.
Remove and clean the strainer. Be sure strainer is tightened securely so it will not suck air.
10.
Be sure all rows are flowing and that all metering tubes/orifices are open. (Note: It will take a higher flow
rate with water to create enough pressure to open all the check valves.)
11.
Run an Auto Check or Nozzle Test to verify that system will lock on to a Target Rate.
H
Maintenance
Hydraulic oil under extremely high pressure. Do not use
hand or any other skin to check for or to stop hydraulic
leaks. Be sure pressure is relieved before loosening hy-
draulic fittings. Replace worn hoses immediately. Seek
medical care immediately if hydraulic oil is shot into the
eye or the skin.
These pumps can deliver liquid at high pressure (290
PSI). Be sure the 100 PSI Pressure Relief Valve (PRV) is
installed and functioning so system pressure will be kept
under 100 PSI. Check hoses, hose clamps, and liquid fit-
tings regularly and repair or replace loose connections.
SurePoint
Ag
Systems