micro-trak 17632 Instructions Manual page 12

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
Connecting the Planter Drive Assembly to the Hydraulic System
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.
Instructions for Micro-Trak
Seed Rate Control Systems
Used with Raven 440/450 Controllers
Installing the Planter Drive
• (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
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.
P/N 50289 Rev A • © 2009 • Page 12
(cont)