Belt Maintenance; Servicing The Alternator Belt; Hydraulic System Maintenance; Changing The Hydraulic Fluid - Toro 30873 Operator's Manual

Belt Maintenance

Servicing the Alternator Belt

Service Interval: Every 100 hours
Check the condition and tension of the belts (Figure 47) after
every 100 operating hours.
1. Proper tension will allow 10 mm (3/8 inch) deflection
when a force of 44 N (10 lb.) is applied on the belt
midway between the pulleys.
2. If the deflection is not 10 mm (3/8 inch), loosen the
alternator mounting bolts (Figure 47). Increase or
decrease the alternator belt tension and tighten the
bolts. Check the deflection of the belt again to ensure
that the tension is correct.
g020537
Figure 47
1. Mounting bolt
1
2
2. Alternator
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
U.S. 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 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 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
48 and Figure 49).
3. Lubricate the new filter gasket and fill the filter with
hydraulic fluid.
43