Hydraulic System Maintenance; Hydraulic System Safety; Checking The Hydraulic Fluid - Toro 30609 Operator's Manual

Hydraulic System
Maintenance

Hydraulic System Safety

WARNING
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• 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.
• Seek immediate medical attention if fluid
is injected into skin.
Checking the Hydraulic
Fluid
Service Interval: Before each use or daily
The reservoir is filled at the factory with approximately
29 L (7.75 US gallons) of high-quality hydraulic fluid.
Check the level of the hydraulic fluid before the engine
is first started and daily thereafter. The recommended
replacement fluid is as follows:
Toro Premium All Season Hydraulic Fluid
(Available in 19 L (5 US gallons) pails or 208 L (55 US
gallons) drums. See the Parts Catalog or your Toro
Distributor for part numbers).
Alternative fluids: If the Toro fluid is not available,
other conventional, petroleum-based fluids may be
used, provided they meet all of the following material
properties and industry specifications. Check with
your oil supplier to see whether the oil 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 recommendation.
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 (2/3 fl oz) bottles. 1 bottle is
sufficient for 15 to 22 L (4 to 6 US gallons) of
hydraulic oil. 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 from the ignition.
2. Check the hydraulic-fluid level
67
St @ 40° C 44 to 50
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 95).