Specifications - Toro 09801 Operator's Manual

Specifications

Engine: Onan, 4-cycle, opposed-twin, air-cooled, 17.9
kW (24 hp) @ 3600 rpm, 983 cc displacement.
Electric start. Heavy-duty valve package. Extended
service air cleaner. 2.8 l oil capacity. Solid-state
ignition.
Clutches: Electromagnetic, dual-groove belt drive for
the water pump and driveshaft flange brake/clutch
for the main valve gearbox.
Electrical: 12-volt system with 20-amp circuit breaker
protection. Relays for all high-current switching.
Electronic controller and sensors for automatic
start-up and shut-down sequence of the water injec-
tion system. Group 28 battery with 525 cold-crank
amps.
Traction Drive: Closed-loop hydrostatic drive consist-
ing of Sundstrand variable volume pump and
Parker low-speed, high-torque wheel motor mount-
ed to steering fork. Hydraulic system contains 4.73
l with 25-micron suction line filter and gearbox
reservoir.
Tires/Wheels: Three, smooth-tread 2-ply, 18 x 9.50-8,
pneumatic tubeless, tires. Demountable drop-center
steel wheels with (4) lug nuts mounted to tapered
roller bearing hubs on the transport arms and brake
hub on the wheel motor. All are interchangeable.
Brake: Drum- and shoe-type parking brake mounted to
the wheel motor. Holds unit on a 30% grade.
Transport Lift: 12-volt Warner Electric linear screw
actuator with 15.24 cm stroke. Raises and lowers
lift arm/transport tires and activates hole spacing
control.
Fuel Capacity: 39.75 l gasoline.
Water Injection System:
Pre Filter—Spin-down type with washable cartridge
in clear plastic housing and plastic ball valve for
flushing.
Supply Filter—Replaceable cartridge in plastic
8
housing with an air bleed button.
Water Pressure Switch—Senses for water pressure
after the filter and turns on when pressure is over
138–193 kPa and turns off when pressure drops
below 48–90 kPa.
Pump—Pump is a Toro exclusive design (patent pend-
ing) 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 rpm @ 34,473 kPa
with 1400 rpm input.
Accumulator—Toro exclusive design with low charge
pressure sensor, nitrogen gas charged to a maximum
of 17,237 kPa.
Cam and Gearbox—Reduction gear drive for cam that
actuates the main water valve. Roller cam follower
rides on a cam specifically designed (patent pend-
ing) to control water injection at 5.3 cycles per sec-
ond (320 rpm) and store energy in the accumulator
between injections. Cast iron case also serves as 3.8
l hydraulic reservoir.
Valve—Cast stainless steel valve body functions as a
mounting base for the accumulator, gearbox and
manifold outlet. All high-pressure water flows in
and out through the valve body. Pressure-balanced
valve spool with floating (patent pending), 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.
Rollers—Pivoting aluminum rollers uniformly smooth
the turf and provide protection from the nozzle dis-
charge. Adjustable flow (0–3 gpm) spray wash sys-
tem with 6 flood tip nozzles maintain clean rollers.
Pressure Relief Valve—Circle Seal Controls poppet-
type valve preset to 34,473 kPa with corrosion resis-
tant stainless and brass materials.