Great Plains V-300F Operator Manual - Manual (Page 21)

6/29/2006 148-057M
19 Preparation and Setup
Refer to Figure 8
3. Remove the retaining clips from the pins at
both ends of the cylinders for both transport
lifts.
4. Turn cylinders to a position where rod ends
are higher than base ends. Support cylinders
in a safe location.
5. Start tractor and run engine at idle speed.
With rod ends higher than base ends, hydrau-
lically extend cylinders. After cylinder rods are
fully extended, continue to hold control lever
for one minute before hydraulically retracting
cylinders.
6. Repeat step 5 three times to completely bleed
system. If air is still trapped in either cylinder,
it will operate in jerky, erratic motions. Repeat
steps until cylinder movement is smooth and
even.
7. Repin cylinders to the transport lift.
8. Refill tractor hydraulic-fluid reservoir to proper
level.
Bleeding Marker Hydraulics
!
CAUTION
You may be injured if hit by a folding or unfolding
marker. Markers may fall quickly and unexpectedly if
the hydraulics fail. Never allow anyone near the drill
when folding or unfolding the markers.
1. Check that tractor hydraulic reservoir is full.
2. With both markers lowered into field position,
loosen hydraulic-hose fittings at rod and base
ends of marker cylinders. Loosen fittings on
back side of sequence valve.
IMPORTANT: Never bleed an O-ring fitting. In-
stead, bleed a nearby pipe or JIC fitting.
3. With tractor idling, activate tractor hydraulic
valve until oil seeps out around a loosened fit-
ting. Tighten that fitting.
IMPORTANT: JIC fittings do not require high
torque. JIC and O-ring fittings do not require
sealant. Always use liquid pipe sealant when
adding or replacing pipe-thread fittings. To
avoid cracking hydraulic fittings from over
tightening, do not use plastic sealant tape.
4. Reactivate tractor hydraulic valve until oil seeps
out around another loosened fitting. Tighten that
fitting. Repeat process until all loosened fittings
have been bled and tightened.
Figure 8
Unpin
22618
Pin