Great Plains 3P300 Operator Manual - Manual (Page 20)

16 3P300 S/N HH1113+ Great Plains Manufacturing, Inc.
500-103M-A 09/14/2009
Great Plains PTO Pump Hookup
DANGER
!
Entanglement hazard - Keep hands, hair, loose clothing, lan-
yards and feet well away from a rotating PTO drive line. Shut
off tractor completely before hitching, unhitching, or making
any adjustments to or near the PTO.
1. Position the PTO pump on the tractor’s PTO shaft
with the coupler bolt removed on the splined end.
2. Push the coupler of the pump on to align with notch
in the tractor PTO shaft and install bolt.
3. For a 540 RPM pump or a 1000 RPM 1 3 ⁄
8
in spline
pump, torque the 1 ⁄
2
in Grade 8 coupler bolts to 105
ft-lbs.
4. Rotate the PTO shaft by hand to make sure the bolts
clear the PTO shielding.
5. Securely attach the torque bar chain to the tractor
drawbar. Allow just enough slack to permit a full
range of three point hitch operations, such as raising/
lowering, and leveling.
6. Rotate the pump housing in the direction of PTO
rotation, to the full extension of the chain.
7. Hook the tarp strap so that the pump holds the chain
at full extension through the full range of three point
hitch operations. This prevents the torque arm from
snapping the chain to full extension at PTO startup.
8. Tie up any loose hoses with cable ties to prevent
hose damage.
9. With water in the sprayer tank, and water in the
pump, engage the PTO shaft slowly with the tractor
engine idling.
Once the system builds pressure, close the agitation
valve, shut off the boom section switches and close
throttling valves (if applicable). Sprayers with auto-
matic controllers do not have throttling valves. The
pump is now at dead head pressure.
Adjust the engine RPM so that the spray pressure
reaches 80 PSI maximum on the nozzle pressure
gage, or the PTO speed reaches the rated RPM (540
or 1000), whichever is first.
Never exceed the rated tractor PTO RPM. This is the
RPM needed to spray, but without excess pressure
in the sprayer’s plumbing.