Hydraulic System Maintenance; Hydraulic System Safety; Checking The Hydraulic Fluid - Toro 30605 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 gallon) pails or 208 L (55 gallon) 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 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
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
52
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 72).