Great Plains TA520S Operator Manual - Manual (Page 61)

3/18/2005 500-061M
59 Troubleshooting
Troubleshooting
Area of Concern
Problem
Area
Specific Checks Corrections
Pressure
Decreasing
Between
gauge &
liquid
supply 1. Pump wearing
2. Plugged suction or pump to pres-
sure head hose
3. Plugged Whirlfilter
4. Plugged gauge
1. Rebuild or replace pump
2. Clean hose and reduce cause
of clogging
3. Clean out Whirlfilter, refer to
page 24
4. Open gauge clean-out valve
and flush gauge protector.
Pressure
Fluctuating
Between
pump out-
let & liquid 1. Check suction hose & fittings for air
leaks. Air in system is indicated by
buffs of air at nozzles
2. Vortex in tank suction
3. Cracked pump housing
1. Remove obstruction from clogged
area.
2. Align agitators properly
3. Replace pump housing
Pressure
Increasing
Between
gauge &
nozzle 1. Nozzle screens clogged
2. Nozzle orifices plugged
3. Boom hoses becoming clogged
4. Boom hoses pinched
1. Clean screens
2. Remove material with soft
brush or air
3. Remove obstruction from
clogged area.
4. Use cable ties to position hose
so it will not kink
Pressure
Cannot
Increase
Pump or
electric ball
valve 1. From nozzle charts check liquid de-
mand against pump capacity {Nozzle
requirement + agitation requirement}
2. Electric ball valve or gauge not
functional
3. Pressure adjust switch faulty
4. Fuse is out in the control box
5. Manual pressure adjustment
valve not all the way open
1. Reduce swath width by nozzle re-
duction; install smaller nozzles &
drive at a lower rate of speed
2. Replace or repair
3. Test switch & replace if faulty
4. Replace fuse
5. Open the manual pressure
valve all the way & allow the
electric ball valve to govern the
pressure
No
Pressure
Plumbing 1. Tank shut-off valves off
2. Loose fittings
3. Collapsed suction hose to pump
4. Obstruction in suction hose or
tank
1. Make sure all tank shut-off valves
are open
2. Tighten fittings so pump can
prime
3. Replace hose
4. Remove obstruction
No
Pressure
Pump 1. Hydraulic pump running in the wrong
direction
2. PTO pump coupler loose
1. Switch hydraulic hoses in the trac-
tor outlet
2. Tighten PTO coupler