M0258-01Model 3500
2-6
Rev. 10/14
TM
Machine Operation
RAISED FIELD POSITION
Row units raise approximately 14 inches (35.5 cm) and toolbar approximately 40 inches (101.6 cm) off ground. This
position is used in making turns or passing over waterways during field operation.
Install safety/stroke limiter pin above frame assembly to make contact with stroke limiter valve. Secure with hairpin
clip.
RAISED TRANSPORT POSITION
Planter raises high enough to permit row units to clear transport wheels as planter is rotated.
1. Remove hairpin clip and safety lockup pin.
2. Raise planter until lift cylinder is fully extended.
3. Reinstall safety lockup pin and hairpin clip in same hole which is now below frame assembly.
4. Lower planter onto safety lockup pin.
HYDRAULIC OPERATION (CONTINUED)
VACUUM FAN MOTOR AND VALVE BLOCK ASSEMBLY (If equipped)
Hydraulically operated motor requires maximum flow rate of 13 GPM @ 2000 PSI (49 LPM @13790 kPa) to operate
properly. It must be connected to a zero pressure case drain and connected to the correct pressure and return SCV’s
or PTO fittings.
A pressure relief valve in the valve block assembly prevents build up of oil pressure over 35 PSI in case drain line
when vacuum fan motor is in operation. This valve vents oil outside of valve block through a drain hole in the aluminum
valve block. This can occur whenever the case drain is improperly connected or motor circuit pressure is too high.
See “Hydraulic Diagram - Vacuum Fan Motor System” in Lubrication and Maintenance section.
The valve block also contains a check valve that prevents vacuum fan from operating in wrong direction if pressure is
applied to of motor return side and allows fan to coast to a stop when tractor hydraulic control is returned to neutral.
NOTE: Fan turns at a reduced speed if reverse pressure is applied.
PLANTER LIFT SYSTEM
Planter lift system consists of one lift cylinder located at center of machine. Cylinder mounts are located front and
rear side of center post. Install cylinder in rear position for planters with rear mounted row units only. Cylinder must be
installed in front position for planters with front mounted options (push row units, fertilizer, etc.). A stroke limiter valve
shuts off hydraulic flow when the planter lifts to raised field position and contacts safety/stroke limiter pin. A counter
balance valve holds planter in position until reverse pressure is applied.
NOTE: Planter lift cylinder is equipped with a counter balance valve. Hydraulic pressure is required to lower
planter
SELECTOR VALVE, ROTATE and MARKER CYLINDERS
A hitch mounted, hand operated selector valve selects row marker or fold functions. Rotate cylinder is mounted on the
frame and rotates planter to/from transport position. Row marker cylinders raise and lower row markers.
NOTE: Hydraulic pressure will prevent valve from moving. Release hydraulic pressure from system before
attempting to move selector valve handle.
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