Great Plains 3PD20 Assembly Instructions - Manual (Page 3)

3 4/9/04 Three-Point Drill Flat-Fold Markers 113-380M
Great Plains Mfg., Inc.
Assembly
Hydraulic Setup
!
CAUTION!
Folding the markers with air in the system
will cause erratic, jerky movement. With
air in the system, the markers may crash,
causing injury to bystanders. Always bleed
the marker cylinders before folding.
1. Attach adaptor (1) and elbow fit-
ting (2) to needle valve (3). Attach
elbow fittings (2 and 4) to cylinder
ports. Attach hoses (5 and 6) to
needle valve and elbow fitting.
Route hoses down to and along
drill frame to center of drill. Use ca-
ble ties (7) to keep hoses in place.
2. Bleed air out of the hydraulic sys-
tem.
a.
Unpin rod end of cylinder.
Support cylinder with a block
under cylinder body on the
first marker section.
b. Extend and retract the cylin-
der rod several times to work
air out of the system.
c. Repin cylinder with clevis pin,
cotter pin and flat washers.
3. Using needle valve, adjust marker
folding speed to a slow setting.
4. Fold marker up and down a few
times and check for pinching and
kinking of hoses. Reposition hos-
es if necessary.
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