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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.
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 4 US gallons
(15 l) 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:
Figure 69
2. High flow hydraulics filter
• 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 69). 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.
2. Lubricate the new filter sealing gasket and hand turn
the filter onto the filter head until the gasket contacts
the filter head. Then tighten it 3/4 turn further. The
filter should now be sealed.
3. Fill the hydraulic reservoir with approximately 4 US
gallons (15 l) of hydraulic oil.
4. Start the machine and run it at idle for about two
minutes to circulate the fluid and remove any air
trapped in the system. Stop the machine and recheck
the fluid level.
5. Verify the oil level.
6. Dispose of the oil properly.
49
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