Pto troubleshooting – Great Plains PTO Kits 2-3-Section User Manual
Page 25
2014-09-10
411-015M
Great Plains Manufacturing, Inc.
21
PTO Troubleshooting
Symptom
Cause
Remedy
Air-Pro
®
seed meter
pressure too low
Flow control adjusted too low
Increase flow control (page 13).
Fan butterfly valve closed or set at too high
an angle
Adjust angle (see Operator manual).
PTO rpm too low
Bring up PTO rpm, but do not exceed
1000 rpm.
Fan running in reverse (multiple possible
causes)
See “Fan running in reverse” below.
Pump cavitating
Check oil level (page 11).
No blank disks in unused seed meters
Install blank disks to balance pressure.
Seed inlet shutters open too wide
Verify setting vs., rate charts. Adjust as
need for actual seed pool.
Oil filter clogged
Replace oil filter and oil (page 22).
Magnehelic
®
gauge disconnected or
sample line(s) leaking
Check air gauging system.
Magnehelic
®
gauge uncalibrated
Re-zero (see Operator manual).
Flow control valve failure or malfunction
Repair or replace valve.
Fan seals damaged
Repair or replace fan motor.
PTO rotation and fan or valve hoses
reversed (highly unlikely)
Set tractor controls for clockwise PTO.
Reconnect hoses.
Fan cooler plugged
Clean or replace fan cooler.
Pressure correct on
Magnehelic
®
, but
skips or doubles
Pressure gauge disconnected or sample
line(s) leaking.
Check air gauging system.
Magnehelic
®
gauge uncalibrated.
Re-zero (see Operator manual).
Seed variety may require adjustment.
Check all other possible pressure errors,
then fine tune pressure for one seed per
disk cell.
Oil overheating
Oil filter clogged
Replace oil filter and oil (page 22).
PTO rpm too high
Adjust system for ideal pressure at lower
PTO rpm.
Fan butterfly valve angle too high
Reduce to 30
° (see planter Operator
manual).
Fan running in
reverse
PTO shaft turning counter-clockwise
Set tractor controls for clockwise PTO.
Hoses reversed
Check hose routing from pump to valve, to
reservoir and fan per Parts manual.
Fan doesn’t run at all
Low oil level in reservoir
Top off reservoir. Check system for leaks.
Flow control valve closed
Adjust valve (page 13).
Hoses misconnected