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Hydraulic System
Maintenance
Replacing the Hydraulic Filter
Service Interval: Every 200 hours
1. Position machine on a level surface.
2. Lower the grinder.
3. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
4. Remove the top cover.
5. Remove and discard the old filter (Figure 55).
Figure 55
1. Filler cap
2. Hydraulic filter
6. Install the replacement hydraulic filter and filler cap
(Figure 55) and torque bolt on top to 13 to 15.5 N-m
(110 to 140 in-lb).
7. Clean up any spilled fluid.
8. Install the top cover.
Changing the Hydraulic Fluid
Service Interval: Every 400 hours/Yearly (whichever comes
first)
Hydraulic Fluid Specification:
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 of the following material
properties and the fluid should meet the listed industry
standards. Check with your oil supplier to determine if
the oil 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 oil is available in 20 ml (2/3 oz)
bottles. One bottle is sufficient for 15-22 L (4-6 gallons)
of hydraulic oil. Order part no. 44-2500 from your
Authorized Toro Dealer.
1. Position the machine on a level surface.
2. Lower the grinder.
3. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
4. Allow the machine to cool completely.
5. Remove the top cover.
6. Remove the hydraulic tank filler cap and filter (Figure
55).
7. Place a drain pan capable of hold 37.8 L (10 US gallons)
under the hydraulic tank.
8. Pinch the hose clamp and slide the clamp and hose
off of the fitting on the hydraulic tank, allowing the
hydraulic fluid to drain from the hose and tank into
the pan.
35
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)
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