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5. Install the strainer.
6. Install the hydraulic hose and 90 degree fitting to the
strainer in the same orientation.
7. Install and tighten the drain plug.
8. Fill the reservoir with approximately 7 l (7.5 qt) of
Dexron III ATF. Refer to Checking the High-flow
Hydraulic Fluid (If so equipped) (page 20).
9. Start the engine and operate the vehicle to fill the
hydraulic system. Check the hydraulic oil level and
replenish it, if required.
Important: Use only the hydraulic fluids specified.
Other fluids could cause system damage.
Replacing the Hydraulic Filter
Service Interval: After the first 10 hours
Every 800 hours
Important: Use of any other filter may void the warranty
on some components.
1. Position the vehicle on a level surface, stop the engine,
engage the parking brake, and remove the key from
ignition switch.
2. Clean the area around filter mounting area. Place a
drain pan under the filter and remove the filter (Figure
66).
1. Hydraulic filter
3. Lubricate the gasket on the new filter.
4. Ensure that the filter mounting area is clean. Screw the
filter on until the gasket contacts the mounting plate.
Then tighten the filter one-half turn.
5. Start the engine and let it run for about two minutes to
purge air from the system. Stop the engine and check
the hydraulic oil level and for leaks.
Figure 66
2. High flow hydraulics filter
Changing the High-flow
Hydraulic Oil and Filter (If so
equipped)
Service Interval: After the first 10 hours—Change the high
flow hydraulic oil filter (if so equipped).
Every 800 hours—Change the high flow hydraulic oil
and filter (if so equipped).
The reservoir is filled with approximately 15 l (4 US gallons)
of high quality hydraulic fluid. Appropriate hydraulic oils are
listed below.
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, another
conventional petroleum–based fluid may be used provided
it meets the following material properties and industry
specifications. 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 Antiwear
Hydraulic Fluid, ISO VG 46
Material Properties:
•
Viscosity—ASTM D445 cSt @ 40ºC: 44 to 48/cSt @
100ºC: 7.9 to 8.5
•
Viscosity Index, ASTM D2270—140 to 152
•
Pour Point, ASTM D97— -35ºF to -46ºF
•
FZG, Fail stage—11 or better
•
Water content (new fluid)—500 ppm (maximum)
Industry Specifications:
Vickers I-286-S, Vickers M-2950-S, Denison HF-0, Vickers
35 VQ 25 (Eaton ATS373-C)
Note: Many hydraulic fluids are almost colorless, making it
difficult to spot leaks. A red dye additive for the hydraulic
system oil is available in 2/3 oz. (20 ml) bottles. One bottle is
sufficient for 4–6 gal (15–22 1) of hydraulic oil. Order part
no. 44-2500 from your authorized Toro distributor.
Note: If the oil becomes contaminated, contact your
local Toro distributor because the system must be flushed.
Contaminated oil may look milky or black when compared
to clean oil. The service interval may need to be increased
if using multiple attachments as the oil may become
contaminated quicker with the mixing of different hydraulic
oils.
1. Clean the area around the high flow filter mounting
area (Figure 66). Place a drain pan under the filter and
remove the filter.
Note: If the oil is not going to be drained, disconnect
and plug the hydraulic line going to the filter.
47
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