Toro 31900A - Hydraulic System Maintenance; Hydraulic System Safety; Hydraulic Fluid Specifications; Checking the Hydraulic-Fluid Level

Hydraulic System
Maintenance
Hydraulic System Safety
• Seek immediate medical attention if uid is injected
into skin. Injected uid must be surgically removed
within a few hours by a doctor .
• Ensure that all hydraulic-uid hoses and lines are
in good condition and all hydraulic connections
and ttings 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
uid.
• Use cardboard or paper to nd hydraulic leaks.
• Safely relieve all pressure in the hydraulic system
before performing any work on the hydraulic
system.
Hydraulic Fluid
Specications
The reservoir is lled at the factory with approximately
22.7 L (6 US gallon) of high-quality hydraulic uid.
Check the level of the hydraulic uid before the engine
is rst started and daily thereafter; refer to Checking
the Hydraulic-Fluid Level ( page 69 ) .
Recommended replacement uid: T oro PX
Extended Life Hydraulic Fluid; available in 19 L (5 US
gallon) pails or 208 L (55 US gallon) drums.
Note: A machine using the recommended
replacement uid requires less frequent uid and lter
changes.
Alternative hydraulic uids: If T oro PX Extended
Life Hydraulic Fluid is not available, you may use
another conventional, petroleum-based hydraulic uid
having specications that fall within the listed range
for all the following material properties and that it
meets industry standards. Do not use synthetic uid.
Consult with your lubricant distributor to identify a
satisfactory product.
Note: T oro does not assume responsibility for
damage caused by improper substitutions, so use
products only from reputable manufacturers who will
stand behind their recommendation.
High V iscosity Index/Low Pour Point
Anti-wear Hydraulic Fluid, ISO VG 46
Material Properties:
V iscosity , ASTM D445 cSt @ 40°C (104°F)
44 to 48
High V iscosity Index/Low Pour Point
Anti-wear Hydraulic Fluid, ISO VG 46 (cont'd.)
V iscosity Index ASTM D2270
140 or higher
Pour Point, ASTM D97 -37°C to -45° C (-34°
F to -49° F)
Industry Specications: Eaton V ickers 694 (I-286-S,
M-2950-S/35VQ25 or
M-2952-S)
Note: Many hydraulic uids are almost colorless,
making it dif cult to spot leaks. A red dye additive
for the hydraulic uid is available in 20 ml (2/3  oz)
bottles. A bottle is suf cient for 15 to 22 L (4 to 6 US
gallons) of hydraulic uid. Order Part No. 44-2500
from your authorized T oro distributor .
Important: T oro Premium Synthetic
Biodegradable Hydraulic Fluid is the only
synthetic biodegradable uid approved by T oro.
This uid is compatible with the elastomers used
in T oro hydraulic systems and is suitable for a
wide-range of temperature conditions. This uid is
compatible with conventional mineral oils, but for
maximum biodegradability and performance, the
hydraulic system should be thoroughly ushed
of conventional uid. The oil is available in 19 L
(5 US gallon) pails or 208 L (55 US gallon) drums
from your authorized T oro distributor .
Checking the
Hydraulic-Fluid Level
Service Interval : Before each use or daily
1. Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut of f
the engine, and remove the key .
2. Remove the plug from the hydraulic tank ( Figure
83 ).
69