Hydraulic System Maintenance; Checking The Hydraulic Fluid - Toro 31598 Operator's Manual

Figure 85
Left side deck
Hydraulic System
Maintenance

Checking the Hydraulic Fluid

Service Interval: Before each use or daily—Check the
hydraulic fluid level.
The machines reservoir is filled at the factory with
approximately 19 U.S. gallons (71.9 l) 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 5 gallon pails or 55 gallon drums. See parts catalog or
Toro distributor for part numbers.)
Alternate fluids: If the Toro fluid is not available, other
fluids may be used provided they meet all the following
material properties and industry specifications. We do
not recommend the use of 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
FZG, Fail stage
Water content (new fluid)
Industry Specifications:
58
St @ 40° C 44 to 48
St @ 100° C 7.9 to 8.5
140 to 160
-34° F to -49° F
11 or better
500 ppm (maximum)
Vickers I-286-S (Quality Level),
Vickers M-2950-S (Quality
Level), Denison HF-0