Hydraulic System Maintenance; Hydraulic System Safety; Checking The Hydraulic System - Toro Groundsmaster 3500-G Operator's Manual

Hydraulic System
Maintenance
The reservoir is filled at the factory with approximately 13.2
L (3.5 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 Toro Premium All-Season Hydraulic
Fluid (Available in 19 L (5 US gallons) pails or 55-gallon
drums. See the parts catalog or Toro distributor for part
numbers.)
Alternate fluids: If the Toro fluid is not available, you may
use other fluids provided they meet all the following material
properties and industry specifications. Do not use 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
Viscosity Index ASTM
D2270
Pour Point, ASTM D97
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, 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 oil is available in 19 L (5 US gallons) 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 oil is available in 20 mL (2/3 oz)
bottles. One bottle is sufficient for 15 to 22 L (4 to 6 US
gallons) of hydraulic oil. Order Part No. 44-2500 from
your authorized Toro distributor.
cSt @ 40° C 44 to 48
cSt @ 100° C 7.9 to 8.5
140 to 160
-34° F to -49° F

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
System
Service Interval: Before each use or daily—Check the
hydraulic-fluid level.
1. Perform the pre-maintenance procedure; refer to
Preparing the Machine for Maintenance (page
2. Clean the area around the filler neck and hydraulic-tank
cap (Figure 59).
1. Hydraulic-tank cap
3. Remove the hydraulic-tank cap
4. Remove the dipstick from the filler neck and wipe it
with a clean rag.
5. Insert the dipstick into the filler neck, then remove it
and check the fluid level.
Note: The fluid level should be within 6 mm (1/4
inch) of the mark on the dipstick.
6. If the level is low, add the appropriate fluid to raise the
level to the F
ULL
7. Install the dipstick and cap onto the filler neck.
47
Figure 59
(Figure 59).
mark.
34).
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