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.
Servicing the Hydraulic
Fluid
Important:
Regardless of the hydraulic fluid
type used, any traction unit used for off-green
applications, verticutting or used during ambient
temperatures above 29° C (85°F) should have the
Oil Cooler Kit installed; refer to
.
Hydraulic Fluid Specifications
The recommended replacement fluid is as follows:
Toro Premium All Season Hydraulic Fluid
(Available in
5-gallon pails or 55-gallon drums. See parts catalog or
Toro distributor for part numbers.)
Alternate fluids: If the Toro fluid is not available, other
fluids may be used provided they meet all the following
material properties and industry specifications. We
do not recommend the use of synthetic fluid. Consult
with your lubricant distributor to identify a satisfactory
product
Note:
Toro will not assume responsibility for damage
caused by improper substitutions, so use only
products from reputable manufacturers who will stand
behind their recommendation.
High Viscosity Index/Low Pour Point Anti-wear Hydraulic
Fluid, ISO VG 46
Material Properties:
Viscosity, ASTM D445
cSt @ 40° C 44 to 50
cSt @ 100° C 7.9 to 8.5
Viscosity Index ASTM D2270
140 to 160
Pour Point, ASTM D97
-34° F to -49° F
Industry Specifications:
Vickers I-286-S (Quality Level), Vickers M-2950-S
(Quality Level), Denison HF-0
Important:
The ISO VG 46 Multigrade fluid has
been found to offer optimal performance in a wide
range of temperature conditions. For operation
in consistently high ambient temperatures, 18°C
(65°F) to 49°C (120°F), ISO VG 68 hydraulic fluid
may offer improved performance.
Premium Biodegradable Hydraulic Fluid-Mobil
EAL EnviroSyn 46H
Important:
Mobil EAL EnviroSyn 46H is the only
synthetic biodegradable fluid approved by Toro.
This fluid is compatible with the elastomers used
in Toro hydraulic systems and is suitable for a
wide-range of temperature conditions. This fluid is
compatible with conventional mineral oils, but for
maximum biodegradability and performance the
hydraulic system should be thoroughly flushed of
conventional fluid. The fluid is available in 19 L (5
gallon) containers or 55 gallon drums from your
Mobil Distributor.
Important:
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 oz) bottles. One bottle
is sufficient for 15 to 22 L (4 to 6 gallons) of
hydraulic fluid. Order Part No. 44-2500 from your
authorized Toro distributor.
This red dye is not
recommended for use with biodegradable fluids.
Use food coloring.
Checking the Hydraulic-Fluid
Level
The hydraulic-fluid reservoir is filled at the factory
with high quality hydraulic fluid. Before operating the
machine each day, check the level of the hydraulic
fluid. Your machine has a dipstick or a white plastic
window on the front of the hydraulic-fluid reservoir
(behind the seat on the left side) that is used to check
the hydraulic-fluid level. The fluid should be between
the window lines or the dipstick marks; if not, add the
appropriate fluid.
Important:
To prevent system contamination,
clean the top of the hydraulic fluid containers
before puncturing them. Ensure that the pour
spout and funnel are clean.
1.
Position the machine on a level surface.
Note:
Ensure that the machine has cooled
down so the fluid is cold.
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