Hydraulic System
Maintenance
Servicing the Hydraulic
System
The machine comes from the factory with a full hydraulic
fluid reservoir that contains approximately 75.7 L (20.0 US
gal) of high-quality hydraulic fluid.
Check the level of the
hydraulic fluid before you start the engine for the first
time, and daily thereafter.
Use
Toro Premium All-season Hydraulic Fluid
(available
in 5-gallon pails or 55-gallon drums. See the parts catalog or
an Authorized Toro Service Dealer for part numbers).
If Toro hydraulic fluid is not available, you may use an
equivalent hydraulic fluid, provided that it meets all the
following material properties and industry specifications.
Do
not use a synthetic hydraulic fluid.
Consult with your
lubricant distributor to identify a satisfactory product.
Note:
Toro does not assume responsibility for damage
caused by improper substitutions, so use only products from
reputable manufacturers.
High Viscosity Index/Low Pour Point Anti-wear
Hydraulic Fluid, ISO VG 46
Material Properties:
St @ 40°C (104°F): 44 to 48
Viscosity, ASTM D445
St @ 100°C (212°F): 7.9 to 8.5
Viscosity Index ASTM
D2270
140 to 160
Pour Point, ASTM D97
-37°C (-34°F) to -45°C (-49°F)
FZG, Fail stage
11 or better
Water content (new fluid)
500 ppm (maximum)
Industry Specifications:
Vickers I-286-S (Quality Level),
Vickers M-2950-S (Quality
Level), Denison HF-0
Note:
Many brands of 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 (0.68 oz) bottles.
One bottle is sufficient for 15.1 to 22.7 L (4.0 to 6.0 US gal)
of hydraulic oil. Order part no. 44-2500 from an Authorized
Toro Service Dealer.
Note:
If ambient operating temperatures exceed 110°F,
contact Toro for fluid recommendations.
Changing the Hydraulic Fluid
Service Interval:
Every 1,000 hours
Draining the Hydraulic Reservoir
1.
Park the machine on a level surface, and put all the
attachments in the transport position.
2.
Stop the engine, set the parking brake, and remove the
ignition key.
Note:
Drain the hydraulic fluid reservoir when the
fluid is warm, if possible.
3.
Remove the fill cap/breather from the fill tube (Figure
91).
Figure 91
1.
Hydraulic reservoir
3.
Fill tube
2.
Sight gauge
4.
Fill cap/breather
4.
Place a container that can hold a minimum of 75.7 L
(20.0 US gal) under the hydraulic reservoir drain plug
(Figure 92).
Figure 92
1.
Hydraulic reservoir
4.
Drain pan
2.
Drain port
5.
Forward
3.
Plug
62
Summary of Contents for RT600
Page 71: ...Notes 71...
