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Hydraulic System
Maintenance
Hydraulic System Safety
WARNING
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• Ensure that all hydraulic-fluid hoses and
lines are in good condition and all hydraulic
connections and fittings are tight before
applying pressure to the hydraulic system.
• Keep your body and hands away from pinhole
leaks or nozzles that eject high-pressure
hydraulic fluid.
• Use cardboard or paper to find hydraulic leaks.
• Safely relieve all pressure in the hydraulic system
before performing any work on the hydraulic
system.
• Seek immediate medical attention if fluid is
injected into skin.
Checking the Hydraulic
System
Service Interval: Before each use or daily
The reservoir is filled at the factory with approximately 17 L
(18 US qt) of high-quality tractor transmission/hydraulic
fluid. The recommended replacement fluid is as follows:
Toro Premium All Season Hydraulic Fluid (Available in
19 L (5 gallon) pails or 208 L (55 gallon) drums. See the Parts
Catalog or your 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 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 number 44-2500 from your authorized Toro
distributor.
1. Position the machine on a level surface. Release the
traction pedal to the N
engine. Run the engine at the lowest possible speed to
purge the system of air. Do not engage the PTO.
Raise the deck to extend the lift cylinders, shut off the
engine, and remove the key.
position and start the
EUTRAL
2. Remove the hydraulic-fill cap
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 the level of the fluid
If the level is not within the notched area of the
dipstick, add enough high-quality hydraulic fluid to
raise the level to within the notched area. Do not
overfill the hydraulic system.
5. Replace the dipstick and thread the fill cap finger-tight
onto the filler neck.
6. Check all hoses and fittings for leaks.
1. Dipstick
Changing the Hydraulic Fluid
And Filter
Service Interval: After the first 200 hours
Every 800 hours
1. Disengage the PTO, release the traction pedal to the
N
position and set the parking brake.
EUTRAL
2. Move the throttle lever to the
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
42
(Figure
42) from the filler
(Figure
Figure 42
position, shut off
SLOW
(Figure
43).
42).
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