Great Plains John Deere 750 20' Flat Fold Markers - Manual (Page 9)

3/20/2003 205-038M
7 Operating and Assembly Instructions
Refer to Figure 3
4. Route the hoses from each marker through
the mount and out the opening in the inside
end of the mount. Slide the cylinder and first
section assembly (1) into the mount and man-
ually swing the first section into the lowered
position. Bolt the flanges of the assembly and
mount together with four 5/8" x 2" long bolts
(2), lock washers(3), and nuts (4) in each
mount.
5. Route the hoses along the coulter frame tube
and tie them to the tube with the releasable
cable ties (6).
6. Connect the hoses to the sequence valve (7)
with four JIC elbows (5).
7. Connect the two 156" long hoses (8) to the
two top ports of the sequence valve with two
elbows (5) and route them to the tongue and
through the hose loop. Use releasable cable
ties sent with assembly to secure hose to
frame.
8. With the first section in the lowered position,
connect the hoses to the tractor. Be sure the
tractor reservoir is full.
9. With the markers in field position, crack the
hydraulic hose fittings located at the base end
of one of the cylinders. With the tractor at an
idle speed, activate the tractor hydraulics
valve until hydraulic oil seeps out around the
hose end. Tighten the hose end fittings. Re-
peat this process for the hose at the rod end
of the cylinder. Crack the fittings on the back
side of the sequence valve until hydraulic oil
seeps out. Tighten and repeat for the oppo-
site cylinder.
10. Cycle each cylinder 3 or 4 times slowly. Both
arms should move to the vertical position on
the first move and then they should lower and
raise alternately as the hydraulic lever is oper-
ated.
!
DANGER
Keep all persons clear of the marker when operating.
Air in the hydraulic system can cause the marker arm
to drop quickly. Make sure the system is properly
charged.
Figure 3
Marker Hydraulic Assembly
13351