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Hydraulic System
Maintenance
The reservoir is filled at the factory with approximately
18 quarts (17 l) of high quality tractor transmission/hydraulic
fluid. The recommended replacement fluid is as follows:
Toro Premium Transmission/Hydraulic Tractor 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, Mobil® 424
hydraulic fluid may be used.
Note: Toro will not assume responsibility for damage caused
by improper substitutions.
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
number 44-2500 from your authorized Toro distributor.
Checking the Hydraulic
System
Service Interval: Before each use or daily
Check the level of the hydraulic fluid before the engine is first
started and daily thereafter.
1. Position the machine on a level surface. Release the
traction pedal to the neutral position and start the
engine. Run engine at lowest possible RPM to purge
the system of air. Do not engage the PTO. Raise
the deck to extend lift cylinders, stop the engine, and
remove the key.
2. Remove the hydraulic fill cap (Figure 42) from filler
neck.
3. Remove the dipstick and wipe it with a clean rag
(Figure 42).
4. Screw the dipstick all the way into the filler neck; then
remove it and check level of fluid (Figure 42).
If level is not within notched area of the dipstick, add
enough high quality hydraulic fluid to raise level to
within the notched area. Do not overfill.
5. Replace the dipstick and thread the fill cap finger-tight
onto filler neck.
6. Check all hoses and fittings for leaks.
1. Dipstick
Changing the Hydraulic Oil
And Filter
Service Interval: After the first 200 hours
Every 800 hours
1. Disengage the PTO, release the traction pedal to the
neutral position and set the parking brake.
2. Move the throttle lever to the Slow position, stop the
engine, remove the key, and wait for all moving parts to
stop before leaving the operating position.
3. Place a large pan under the hydraulic reservoir and
transmission case and remove the plugs, draining all of
the hydraulic fluid (Figure 43).
41
Figure 42
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