Belt Maintenance; Servicing The Alternator Belt; Hydraulic System Maintenance; Changing The Hydraulic Fluid - Toro 30868 Groundsmaster 4700-D Operator's Manual
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- Service manual (298 pages) ,
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- Operator's manual (92 pages)
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B. Tighten the rear nut to move the cable
backward until the brake pedals have 1/2 to
1 in. (13 to 25 mm) of free travel.
C. Tighten the front nuts after the brakes are
adjusted correctly.
Belt Maintenance
Servicing the Alternator Belt
Check the condition and tension of the belts
(Figure 52 ) after every 100 operating hours.
1. Proper tension will allow 3/8 in. (10 mm)
deflection when a force of 10 lb. is applied on the
belt midway between the pulleys.
2. If the deflection is not 3/8 in. (10 mm), loosen the
alternator mounting bolts (Figure 52 ). 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.
Figure 52
1. Alternator
Hydraulic System
Maintenance
Changing the Hydraulic
Fluid
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
2. Mounting bolt
into a large drain pan. Connect the line when the
hydraulic fluid stops draining.
3. Fill the reservoir with approximately 7.5 gallons
of hydraulic fluid; refer to Checking the Hydraulic
Fluid in Operation, page 19.
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
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 53 and Figure 54 ).
3. Lubricate the new filter gasket and fill the filter
with hydraulic fluid.
43
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