Toro 91764SL User Manual
Testing
Before Performing Water System Tests
1. 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 ac
cumulator. 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.
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 ac
cumulator. 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.
j
High pressure water system components can
cause personal in ury if disassembled incor
rectly. Discharge water pressure at bleed
valve before attempting any water system
servicing. Open bleed valve slowly and avoid
contact with high velocity water stream.
cause personal in ury if disassembled incor
rectly. Discharge water pressure at bleed
valve before attempting any water system
servicing. Open bleed valve slowly and avoid
contact with high velocity water stream.
WARNING
2. With engine OFF, open high pressure bleed valve,
and inspect aeration nozzles. Check for plugged noz
zles. Verify size and quantity (see Nozzle Service and
Replacement). Nozzles that are too large will cause loss
in pressure and could cause damage to the accumulator
and other water system components.
and inspect aeration nozzles. Check for plugged noz
zles. Verify size and quantity (see Nozzle Service and
Replacement). Nozzles that are too large will cause loss
in pressure and could cause damage to the accumulator
and other water system components.
NOTE: You can check for plugged nozzles by aerating
over a piece of cardboard, then inspecting cardboard.
over a piece of cardboard, then inspecting cardboard.
1
Figure 13
1. High pressure bleed valve
Testing
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HydroJect
™
3000