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Hydraulic System
Maintenance
Changing the Hydraulic Fluid
Service Interval: After the first 200 hours
Every 800 hours
Change the hydraulic fluid after every 800 operating
hours, in normal conditions. If the fluid becomes
contaminated, contact your local Toro distributor
because the system must be flushed. Contaminated fluid
looks milky or black when compared to clean oil.
1. Turn the engine off and raise the hood.
2. Loosen the drain valve on the bottom of the
reservoir and let the hydraulic fluid flow into large
drain pan. Close the valve when the hydraulic fluid
stops draining.
3. Fill the reservoir (Figure 74) with approximately
8 U.S. gallons (30 l) of hydraulic fluid; refer to
Checking the Hydraulic Fluid.
Important: Use only the hydraulic fluids
specified. Other fluids could cause system
damage.
Figure 74
1. Hydraulic reservoir
4. Install the reservoir cap. Start the engine and use all
of the hydraulic controls to distribute hydraulic fluid
throughout the system. Also check for leaks; then
stop the engine.
5. Check the fluid level and add enough to raise level
the level to the Full mark on the dipstick. Do not
overfill.
Replacing the Hydraulic Filters
Service Interval: After the first 200 hours
Every 800 hours
Change the 2 hydraulic filters initially after the first 200
operating hours. Thereafter, change the filters after
every 800 operating hours, in normal conditions.
Use Toro replacement filters (Part No. 94-2621 for the
left side of the machine and 75-1310 for the right side
of the machine).
Important: Use of any other filter may void the
warranty on some components.
1. Position the machine on a level surface, lower the
cutting units, stop the engine, engage the parking
brakes, and remove the ignition key.
2. Clean the area around the filter mounting area. Place
a drain pan under the filter and remove the filter
(Figure 75).
3. Lubricate the new filter gasket and fill the filter with
hydraulic fluid.
4. Ensure that the filter mounting area is clean. Screw
the filter on until the gasket contacts the mounting
plate; then tighten the filter an additional 1/2 turn.
5. Once the reservoir is filled, start the engine and let
it run at low idle for approximately two minutes.
Activate steering and raise/lower cutting units
several times to purge air from the system. Stop the
engine and check for leaks.
49
Figure 75
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