Hydraulic System Maintenance; Hydraulic Fluid Specifications; Checking The Hydraulic-Fluid Level - Toro 320-D Operator's Manual

Hydraulic System
Maintenance
Hydraulic Fluid
Specifications
Use only 1 of the following fluids in the hydraulic
system:
•
Toro Premium Transmission/Hydraulic Tractor
Fluid (refer to your Authorized Toro Dealer for
more information)
•
Toro Premium All Season Hydraulic Fluid
(refer to your Authorized Toro Dealer for more
information)
•
If either of the above Toro fluids are not available,
you may use another Universal Tractor
Hydraulic Fluid (UTHF), but they must be only
conventional, petrolium-based products. The
specifications must fall within the listed range for
all the following material properties and the fluid
should meet the listed industry standards. Check
with your hydraulic fluid supplier to determine if the
fluid meets these specifications.
Note:
Toro will not assume responsibility for
damage caused by improper substitutions, so use
only products from reputable manufacturers who
will stand behind their recommendations.
Material Properties
Viscosity, ASTM D445
Viscosity index, ASTM D2270
Pour Point, ASTM D97
Industry Standards
API GL-4, AGCO Powerfluid 821 XL, Ford New Holland
FNHA-2-C-201.00, Kubota UDT, John Deere J20C, Vickers
35VQ25 and Volvo WB-101/BM
Note:
Many hydraulic fluids are almost colorless,
making it difficult to spot leaks. A red dye additive
for the hydraulic system fluid is available in 20
ml (2/3 fl oz) bottles. One bottle is sufficient for
15 to 22 L (4 to 6 US gallons) of hydraulic fluid.
Order Part No. 44-2500 from your Authorized Toro
Dealer.
cSt at 40°C: 55 to 62
cSt at 100°C: 9.1 to 9.8
140 to 152
-37 to -43°C (-35 to -46°F)
Checking the
Hydraulic-Fluid Level
Service Interval: Every 25 hours
Check the hydraulic-fluid level before the engine is
first started and after every 25 operating hours.
Hydraulic Tank Capacity: 56 L (14.8 US gallons)
Refer to Hydraulic Fluid Specifications (page 38)
hydraulic-fluid specifications.
Important:
Always use the correct hydraulic
fluid. Unspecified fluids will damage the hydraulic
system.
1. Remove the attachment, if one is installed.
2. Park the machine on a level surface, raise the
loader arms, and install the cylinder locks.
3. Shut off the engine, remove the key, and allow
the engine to cool.
4. Remove the front-access cover.
5. Clean the area around the filler neck of the
hydraulic tank
6. Remove the filler-neck cap and check the fluid
level on the dipstick
Note:
The fluid level should be between the
marks on the dipstick.
1. Filler-neck cap
7. If the fluid level is low, add enough fluid to raise
it to the proper level.
8. Install the filler-neck cap.
9. Install the front-access cover.
10. Remove and store the cylinder locks and lower
the loader arms.
38
(Figure 39).
(Figure 39).
Figure 39
2. Dipstick
for
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