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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 loader arm/attachment-tilt lever between the
forward positions to lower the loader arms.
Figure 69
Hydraulic Fluid
Specifications
Hydraulic-System Capacity: 37.8 L (10 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
Viscosity, ASTM D445
Viscosity index, ASTM D2270
Pour Point, ASTM D97
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
g366905
for the hydraulic system fluid is available in 20 ml
(0.67 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 Dealer.
47
cSt at 40°C: 55 to 62
cSt at 100°C: 9.1 to 9.8
140 to 152
-37 to -43°C (-35 to -46°F)
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