Great Plains PTO Kits Single-Section - Manual (Page 25)

2014-06-16 Table of Contents Index 401-885M
Great Plains Manufacturing, Inc. Table of Contents Index 21
PTO Troubleshooting
Symptom Cause Remedy
Seed meter pressure
too low Flow control adjusted too low. Increase flow control (page 17).
Fan butterfly valve closed or set at too high
an angle. Reduce to 30
° (page 17).
PTO rpm too low. Bring up PTO rpm, but do not exceed
540 rpm.
Fan running in reverse (multiple possible
causes). See “Fan running in reverse” below.
Pump cavitating. Check oil level (page 14).
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
° (page 17).
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
tank and fan per Parts manual.
Fan doesn’t run at all
Low oil level in tank. Top off tank. Check system for leaks.
Flow control valve closed. Adjust valve (page 17).
Hoses misconnected. Review installation (page 54).