Hydraulic System
Maintenance
Hydraulic System Safety
•
Seek immediate medical attention if fluid is injected
into skin. Injected fluid must be surgically removed
within a few hours by a doctor.
•
Ensure that all hydraulic-fluid hoses and lines are
in good condition and all hydraulic connections
and fittings are tight before applying pressure to
the hydraulic system.
•
Keep your body and hands away from pinhole
leaks or nozzles that eject high-pressure hydraulic
fluid.
•
Use cardboard or paper to find hydraulic leaks.
•
Safely relieve all pressure in the hydraulic system
before performing any work on the hydraulic
system.
Relieving Hydraulic
Pressure
To relieve hydraulic pressure while the engine is on,
disengage the auxiliary hydraulics and fully lower and
retract the loader arms.
To relieve the pressure while the engine is off, cycle
the joystick between the forward positions to lower the
loader arms (
).
g303358
Figure 77
Hydraulic-Fluid
Specifications
Every 400 hours—Replace the hydraulic oil and
filters (if not using Toro fluid).
Every 1,000 hours—Replace the hydraulic oil
and filters (if using Toro fluid).
Hydraulic-Tank Capacity:
57.7 L (15.25 US gallons)
Use only 1 of the following fluids in the hydraulic
system:
•
Toro Premium Transmission/Hydraulic Tractor
Fluid
(refer to your Authorized Service Dealer for
more information)
•
Toro PX Extended Life Hydraulic Fluid
(refer
to your Authorized Service Dealer for more
information)
•
If either of the above Toro fluids are not available,
you may use another
Universal Tractor
Hydraulic Fluid (UTHF
), but they must be only
conventional, petroleum-based
products. The
specifications must fall within the listed range for
all the following material properties and the fluid
should meet the listed industry standards. Check
with your hydraulic fluid supplier to determine if the
fluid meets these specifications.
Note:
Toro will not assume responsibility for
damage caused by improper substitutions, so use
only products from reputable manufacturers who
will stand behind their recommendations.
Material Properties
cSt at 40°C: 55 to 62
Viscosity, ASTM D445
cSt at 100°C: 9.1 to 9.8
Viscosity index, ASTM D2270
140 to 152
Pour Point, ASTM D97
-37 to -43°C (-35 to -46°F)
Industry Standards
API GL-4, AGCO Powerfluid 821 XL, Ford New Holland
FNHA-2-C-201.00, Kubota UDT, John Deere J20C, Vickers
35VQ25 and Volvo WB-101/BM
Note:
Many hydraulic fluids are almost colorless,
making it difficult to spot leaks. A red dye additive
for the hydraulic system fluid is available in 20
ml (2/3 fl oz) bottles. One bottle is sufficient for
15 to 22 L (4 to 6 US gallons) of hydraulic fluid.
Order Part No. 44-2500 from your Authorized Toro
Dealer.
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