Test No. 1: Accumulator Pre-Charge Pressure - Toro Hydroject 3010 Service Manual

TEST NO. 1: Accumulator Pre-Charge Pressure (Fig. 14, 15, 16, 17)
Pre-charge pressure is measured and corrected when
the piston is resting on bottom cap of accumulator (high
pressure bleed valve open). By temporarily installing
Charging Tool (TOR4001) to top of accumulator,
Nitrogen pressure can be measured and if required,
more Nitrogen can be added.
Obtain a 3000 - 3500 PSI or 6000 PSI Nitrogen tank
from a local compressed gas or welding supply shop.
The charging tool is equipped with a Compressed Gas
Association No. 677 tank connection. These tanks con-
tain enough Nitrogen for 20-30 fills.
NOTE: During operation, working pressure of Nitrogen
in accumulator will be equal to the operating pressure
of the water system.
1. Park machine on a level surface, stop the engine,
engage the parking brake, open the hood and discon-
nect the engine spark plug wires.
DANGER
Charged accumulators contain high pressure
nitrogen. Nitrogen is the only gas to use for
accumulator charging. Installing IMPROPER
gases in an accumulator can cause an EX-
PLOSION AND DEATH. Charging requires
special tools and precautions. Charge ac -
cumulators in a well ventilated area. It is
recommended that the accumulator
checked and charged by an Authorized TORO
Distributor.
Wear eye protection. Keep hands and face
away from gas valve.
Slowly open high pressure water bleed valve
before servicing any component connected
to high pressure water system. Opening the
high pressure bleed valve allows any trapped
water to escape from the system and also
allows accumulator piston to move to bottom
of accumulator cylinder. Failure to open bleed
valve before servicing high pressure water
components can cause personal in ury, DIS-
MEMBERMENT OR DEATH.
Charged accumulators cannot be shipped via
air freight.
2. Slowly open the high pressure bleed valve allowing
any pressurized water to escape.
3. Remove protective cover and yellow valve cap from
top side of accumulator.
HydroJect 3010
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Figure 14
1. High pressure bleed valve
Figure 15
1. Protective cover 2. Valve cap
Testing