Toro Groundsmaster 4000 Operator's Manual page 72

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 (2/3 fl oz) bottles. 1 bottle is
sufficient for 15 to 22 L (4 to 6 US gallons) of
hydraulic oil. 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 from the ignition.
2. Check the hydraulic-fluid level
St @ 40° C 44 to 50
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 103).
Changing the Hydraulic Fluid
Service Interval: Every 800 hours
If the fluid becomes contaminated, contact your
local Toro distributor because the system must be
flushed. Contaminated fluid looks milky or black when
compared to clean oil.
1. Position the machine on a level surface, lower
the mower decks, shut off the engine, and
remove the key from the ignition.
2. Remove the drain plug from the bottom, front of
the reservoir and let the hydraulic fluid flow into
a large drain pan.
3. Install and tighten the plug when the hydraulic
fluid stops draining.
4. Fill the reservoir
refer to Checking the Hydraulic Fluid (page
72
Figure 103
(Figure 104) with hydraulic fluid;
g031863
71).