Filter
Top Products
Specifications
Engine: Onan, 4 cycle, opposed twin, air cooled, 24 hp
@ 3600 rpm, 60 cu. in (983 cc) displacement. Electric
start. Heavy duty valve package. Extended service air
cleaner. 3 quart oil capacity. Solid state ignition. Meets
California Exhaust Emission Standard for 1995 Lawn
and Garden Equipment.
Clutches: Electromagnetic, three groove belt drive for
water pump and driveshaft flange brake/clutch for main
valve gearbox.
Electrical: 12 volt system with fused protection. Relays
for all high current switching. Electronic controller and
sensors for automatic start–up and shut–down se
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quence of water injection system. Group 28 battery with
525 cold crank amps.
Fuel Capacity: 9 gallons gasoline.
Water Injection System:
Pre Filter – A 20 mesh strainer is required in the
supply line to the inlet port.
Supply Filter – Replaceable cartridge in plastic
housing with air bleed button.
Water Pressure Switch – Senses for water pres
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sure after filter and turns on when pressure is over
20–28 psi and turns off when pressure drops below
7–13 psi.
Pump – Pump is a Toro exclusive design with cast
stainless steel head and 3 piston plungers. Vee
packing seals and Kevlar guides. Forged crankshaft
with plasma sprayed ceramic on stainless steel
plungers and cast iron connecting rods. Nominal
performance is 4 gpm @ 5000 psi with 1400 rpm in
-
put.
Accumulator – Toro exclusive design with low
charge pressure sensor, nitrogen gas charged to a
maximum of 2500psi.
Cam and Gearbox – Reduction gear drive for cam
that actuates main water valve. Roller cam follower
rides on cam specifically designed to control water
injection at 5.3 cycles per second (320 rpm) and
store energy in accumulator between injections.
Cast iron case also serves as 4 quart hydraulic res
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ervoir.
Valve – Cast stainless steel valve body functions as
mounting base for accumulator, gearbox and man
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ifold outlet. All high pressure water flows in and out
through the valve body. Pressure balanced valve
spool with floating, hardened stainless seat aligns
during assembly. Bleed valve in base allows for
bleed–off of high pressure and drain down for cold
weather storage. Bolted flanges and polyurethane
O–rings mate all components to valve body.
Pressure Relief Valve – Circle Seal Controls pop-
pet–type valve preset to 5000 psi with corrosion re
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sistant stainless and brass materials.
Manifold and Nozzles – Extruded stainless steel
manifold with11 flanged nozzle extensions contain-
ing check valves and hardened stainless discharge
orifice. Check valves may be reversed in housing to
block unused nozzles.
Controls:
Engine Panel – Hour meter, water pressure gauge
and fuse block.
Control Box Panel – Throttle, choke, water system
engage and disengage buttons.
Electronic Control Module – Solid state potted de
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vice for sequencing start and stop of water system.
Interlocks for water pressure.
Ground Speed (Dependant on tow vehicle):
Aerating: 1.2 mph 4” Hole Spacing
1.8 mph 6” Hole Spacing
Transport: Up to 24 mph
Dimensions:
Length – 44 inches (w/o hitch).
Wheelbase – 37.5 inches
Width – 53 inches.
Height – 39 inches.
Weight –900 pounds.
Aeration Width: 38.7 inches with 11 nozzles on 3.87
inch centers.
Aeration Depth: 4 to 6 inches depending on turf condi-
tions and nozzle configuration.
Hole Pattern: Dependant on tow vehicle in the direction
of travel, and 3.87 or 7.74” increments in width.
Hydroject 4000
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Rev. B
Addendum