Hydraulic System Maintenance; Hydraulic System Safety; Checking The Hydraulic-Fluid Level - Toro Groundsmaster 4500-D Operator's Manual

Hydraulic System
Maintenance

Hydraulic System Safety

•
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. Injected fluid must be surgically removed
within a few hours by a doctor.
Checking the
Hydraulic-Fluid Level
Service Interval: Before each use or daily
The reservoir is filled at the factory with approximately
28.4 L (7.50 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 gallon) pails or 208 L (55
US gallon) drums. See the Parts Catalog or your
authorized 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:
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, 65°F
(18°C) to 120°F (49°C), 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 US gallon) containers or 208 L (55 US 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 (0.67 oz) bottles. A bottle
is sufficient for 15 to 22 L (4 to 6 US gallons) of
hydraulic fluid. Order Part No. 44-2500 from your
authorized Toro distributor.
1. Park the machine on a level surface, engage the
parking brake, lower the cutting units, shut off
the engine, and remove the key.
2. Check the hydraulic-fluid level
60
cSt @ 40°C (104°F)
44 to 50
cSt @ 100°C (212°F)
7.9 to 9.1
140 to 160
-37°C to -45°C (-34°F to
-49°F)
Vickers I-286-S (Quality
Level), Vickers M-2950-S
(Quality Level), Denison
HF-0
(Figure 76).