micro-trak ProPlant, Reference Manual

Page: 22 / 48

Determine your hydraulic system type before proceeding.
Is it an
:
• Open Center System?
• Closed Center System?
• Pressure Compensating
• Closed Center Load Sensing?
From a hose connectivity standpoint, there are just TWO
VARIATIONS in plumbing and are referred to here as either
Open Center or Closed Center configurations.
NOTE: See the illustrations on the following pages for
hydraulic hose plumbing detail for opened and closed
center hydraulic systems as well as single, dual and
multi-drive configurations.
22
Calculate your Hydraulic Oil Needs
1. What is your Maximum Planting Speed in miles per
hour?
MPS = _______
2. What is the closest Desired Seed Spacing in inches?
DSS = _______
3. How many seeds are dispensed per revolution of your
Seed Meter Disc?
SMD = _______
4. What is the Ratio of hydraulic motor revolutions to seed
meter revolutions?
Ratio = _______ to 1
5. What is the Displacement in Cubic Inches of the hydraulic
motor on your planter drive assembly?
CID = _______
EXAMPLE:
MPS = 5
DSS = 6.5
SMD = 30
Ratio = 5.333
CID = 4.9
• (MPS x 5280) x 12 = Inches traveled per hour
(5 x 5280) x 12 = 316800 inches traveled per hour
• Inches traveled per hour ÷ DSS = Seeds per hour
316800 ÷ 6.5 = 48738.46 seeds per hour
• Seeds per hour ÷ SMD = Seed meter revolutions per hour
48738.46 ÷ 30 = 1624.6 seed meter revolutions per hour
• Seed meter revolutions per hour ÷ 60 = Seed meter
revolutions per minute
1624.6 ÷ 60 = 27 seed meter revolutions per minute
• Seed meter revolutions per minute x Ratio = Hydraulic
motor revolutions per minute
27 x 5.333 = 144.4 hydraulic motor revolutions per minute
NOTE: the minimum recommended motor RPM is 30.
• Hydraulic motor revolutions per minute x CID = Cubic
inches of hydraulic oil per minute
144.4 x 4.9 = 707.6 cubic inches of hydraulic oil per minute
• Cubic inches of hydraulic oil per minute ÷ 231 = Gallons
of hydraulic oil per minute
707.6 ÷ 231 = 3 gallons of hydraulic oil per minute
Connecting the Planter Drive Assembly to the Hydraulic System
The hose end fitting required to mate with the supplied
adapters is a #8 JIC 37 degree female.
The recommended hydraulic hose size is 1/2” for both the
pressure and return hoses.
Be sure to route hoses away from pinch points and leave
enough excess length to accommodate folding and
unfolding.
Whether you have an open or closed hydraulic system be
sure to turn the oil flow down to about 20% more than
calculated because the excess oil flow means excess heat.
See how to calculate your hydraulic oil needs at the top of
this page.
Installation
(cont)
Installing the Planter Drive
(cont)