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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 the
loader arms.
To relieve the pressure while the engine is off, move
the auxiliary-hydraulics lever between the forward and
reverse flow positions to relieve auxiliary hydraulic
pressure, and cycle the loader-arm/attachment-tilt
lever between the forward positions to lower the
loader arms
(Figure
62).
Figure 62
Hydraulic-Fluid
Specifications
Hydraulic Tank Capacity: 45.4 L (12 US gallons)
Use only 1 of the following fluids in the hydraulic
system:
•
Toro Premium Transmission/Hydraulic Tractor
Fluid (refer to your Authorized Toro Dealer for
more information)
•
Toro PX Extended Life Hydraulic Fluid (refer to
your Authorized Toro 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 does 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
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 Service
Dealer.
g280733
45
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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