GREAT PLAINS PL5700, Operator'S Manual

Page: 38 / 150

Great Plains | 411-681M | 04/08/2021 31
PL5700 Planter Table of Contents Index Operation
Several rows have a pressure sensor port (18) for
the meter pressure system. A line from each of these
rows is connected to a pressure sensor chamber
(19) to average the pressures.
The averaged pressure is reported by a pressure
gauge (20). See “ Fan Adjustment ” on page 34 for
using the gauge to make fan adjustments.
Do not operate in the ground with the fan
shut off, or with insufficient air pressure. The
meters will completely fill with seed. Meter
clean - out may be required to resume
normal operation.

Fan Hydraulics - Bulk Seed Hoppers
Motor Seal Damage Risk
Do not apply pressure to the case drain line.
Do not change the special quick connector. A
restricted or sealed case drain line will
promptly result in motor seal damage.
Tractor Connections
Fan hydraulic hose connectors to the tractor:

3/4 FORB quick disconnect flatface (1) - case
drain connector

1-1/16 FORB male quick disconnect (2) - motor
return

3/4 FORB male quick disconnect poppet type (3)
- pressure supply
Always connect the case drain hose first.
The case drain (1) hose protects the outer seal of the
hydraulic motor. It is a small line to the hitch, supplied
with a specialized low-seep, flat-face case drain
quick disconnect.
Fan Hydraulic Hoses
Hydraulic hoses must be properly connected for the
fan to operate in the correct direction, at
recommended speed, and without damage.
Hydraulic hose connections to the fans are:

9/16 SAE case drain port (A)

1-1/16 SAE return port (B)

1-1/16 SAE pressure port (C)
Correct air flow (D) is toward the outlet.
Case drain hose (1) - from the seed delivery fan to
the tee behind the motor return and pressure hoses
i
TP-71139
9
14
13
15
16
17
12
18
6
10
11
!
TP-71508
2
1
3
TP-75294
A
C
B
D