Toro 91764SL User Manual
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Troubleshooting
The cause of an improperly functioning water system is
best diagnosed with the use of proper testing equipment
and a thorough understanding of the complete system.
best diagnosed with the use of proper testing equipment
and a thorough understanding of the complete system.
The charts that follow contain detailed information to
assist in troubleshooting. There may possibly be more
than one cause for a machine malfunction.
assist in troubleshooting. There may possibly be more
than one cause for a machine malfunction.
ALL POSSIBLE CAUSES SHOULD BE CHECKED IN
THE ORDER IN WHICH THEY ARE LISTED ON THE
CHARTS.
THE ORDER IN WHICH THEY ARE LISTED ON THE
CHARTS.
Troubleshooting Water System Problems
Refer to the Testing section of this Chapter for precau
tions and specific test procedures.
tions and specific test procedures.
NOTE: The water aeration system operates under very
high pressures and severe duty cycles. Performance of
the water system will be gradually reduced over a period
of time due to normal wear in the pump, valve and
accumulator. If you perform water system tests to isolate
a possible problem, such as reduced hole depth, it is
recommended that ALL tests be performed in the order
listed even if the apparent problem has been isolated,
such as low accumulator pre-charge pressure. This will
verify that all components are operating properly.
high pressures and severe duty cycles. Performance of
the water system will be gradually reduced over a period
of time due to normal wear in the pump, valve and
accumulator. If you perform water system tests to isolate
a possible problem, such as reduced hole depth, it is
recommended that ALL tests be performed in the order
listed even if the apparent problem has been isolated,
such as low accumulator pre-charge pressure. This will
verify that all components are operating properly.
Condition
Possible Cause
Correction
Machine does not start aerating
Transport wheels not fully raised
Check to make sure transport
when engage button is pushed in
(unit lowered to aerate mode).
wheel arms are fully raised (unit
(pump belt does NOT rotate).
in aerate mode).
Low inlet water pressure.
Check that water pressure gauge
reads 20 to 30 PSI or more. If
pressure is low, obtain proper
water supply source.
reads 20 to 30 PSI or more. If
pressure is low, obtain proper
water supply source.
Sheared pump clutch key.
Repair.
Electrical problem.
See Troubleshooting in
Chapter 5 - Electrical System
Chapter 5 - Electrical System
Machine does not start aerating
Electric brake clutch (valve clutch)
Check air gap at electric brake
when engage button is pushed in
out of adjustment.
clutch and adjust if necessary.
(pump belt IS rotating but gear
case drive shaft is NOT rotating.).
case drive shaft is NOT rotating.).
Sheared valve clutch key.
Repair.
Electrical problem.
See Troubleshooting in
Chapter 5 - Electrical System
Chapter 5 - Electrical System
Machine makes unusual noise
Air in system. NOTE: Relief valve
With engine OFF and water supp
when first starting aeration.
may “squeal” for a short period of
ly connected, open high pressure
time during initial startup due to air
bleed valve and bleed air out of
in the system.
system. Repeat procedure if
noise continues.
noise continues.
Damaged component.
Check for damaged components
and repair or replace as neces
sary.
and repair or replace as neces
sary.
HydroJect
™
3000
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Troubleshooting