Hydraulic System Maintenance; Changing The Hydraulic Fluid; Replacing The Hydraulic Filters; Checking The Hydraulic Lines And Hoses - Toro 03780 Operator's Manual

Hydraulic System
Maintenance

Changing the Hydraulic Fluid

Service Interval: 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. Disconnect the case return line from the bottom of the
reservoir and let the hydraulic fluid flow into a large
drain pan. Connect the line when the hydraulic fluid
stops draining.
3. Fill the reservoir with approximately 28.4 liters
(7.5 gallons) of hydraulic fluid; refer to Checking the
Hydraulic Fluid.
Important: Use only the hydraulic fluids
specified. Other fluids could cause system
damage.
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 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 rear
(cutting unit) of the machine and 75-1310 for the front
(charge) 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
71 and Figure 72).
3. Lubricate the new filter gasket and fill the filter with
hydraulic fluid.
1. Hydraulic filter
1. Hydraulic filter
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. Start the engine and let it run for about two minutes to
purge air from the system. Stop the engine and check
for leaks.
Checking the Hydraulic Lines
and Hoses
Service Interval: Before each use or daily
Inspect the hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings, weather
52
Figure 71
Figure 72