Toro 30635 Operator's Manual page 56

High Viscosity Index/Low Pour Point
Anti-wear Hydraulic Fluid, ISO VG 46
Material Properties:
Viscosity, ASTM D445
Viscosity Index ASTM D2270
Pour Point, ASTM D97
Industry Specifications:
The proper hydraulic fluids must be specified for mobile
machinery (as opposed to industrial plant usage), multi-weight
type, with ZnDTP or ZDDP anti-wear additive package (not
an ashless-type fluid).
Toro Synthetic Biodegradable Hydraulic Fluid (Available
in 19 L (5 US gallon) pails or 208 L (55 US gallon) drums. See
the Parts Catalog or your Toro Distributor for part numbers)
This high quality synthetic, biodegradable fluid has been
tested and found compatible for this Toro model. Other
brands of synthetic fluid may have seal compatibility problems
and Toro cannot assume responsibility for unauthorized
substitutions.
Important: This synthetic fluid is not compatible with
the Toro Biodegradable Fluid previously sold. See your
Toro Distributor for more information.
Alternative biodegradable fluids:
Mobil EAL Envirosyn H 46 (US)
Mobil EAL Hydraulic Oil 46 (International)
Important: Many hydraulic fluids are almost colorless,
making it difficult to spot leaks. A red dye additive for
the hydraulic system oil is available in 20 ml (0.67 fl oz)
bottles. 1 bottle is sufficient for 15 to 22 L (4 to 6 US
gallons) of hydraulic fluid. Order Part No. 44-2500 from
your Toro Distributor.
1. Position the machine on a level surface, lower the
mower decks, shut off the engine, and remove the key.
2. Check the hydraulic-fluid level
St @ 40° C 44 to 48
St @ 100° C 7.9 to 8.5
140 to 160
-34° F to -49° F
Vickers I-286-S (Quality
Level), Vickers M-2950-S
(Quality Level), Denison
HF-0
(Figure 74).
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Figure 74