Toro 39988 Operator's Manual page 43

6. If there is no fluid, add fluid to the reservoir until it
reaches the cold level of the baffle.
7. Run the machine at low idle for 15 minutes to allow
any air to purge out of the system and warm fluid.
Refer to Starting and Stopping the Engine.
8. Recheck the fluid level while the fluid is warm. If
required, add fluid to the reservoir until it reaches
the hot level of the baffle.
Note: The fluid level should be to the top of the hot
level of the baffle, when the fluid is warm (Figure 54).
9. Install cap on filler neck.
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• If hydraulic fluid is injected into the skin
it must be surgically removed within a few
hours by a doctor familiar with this type of
injury. Gangrene may result if this is not
done.
• Keep body and hands away from pin hole
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.
• Make sure all hydraulic fluid hoses and
lines are in good condition and all hydraulic
connections and fittings are tight before
applying pressure to hydraulic system.
Replacing the Hydraulic Filter
Change the hydraulic filter as follows:
• After the first 8 operating hours.
• After every 200 operating hours.
1. Disengage the PTO and set the parking brake.
2. Stop the engine and wait for all moving parts to stop
before leaving the operating position.
Important: Do not substitute automotive oil
filter or severe hydraulic system damage may
result.
3. Remove hydraulic reservoir cap and temporarily
cover opening with a plastic bag and rubber band to
prevent all hydro fluid from draining out.
4. Locate filter under engine base and place drain pan
under filter (Figure 55).
5. Remove the old filter and wipe the filter adapter
gasket surface clean (Figure 55).
1. Hydraulic filter
2. Gasket
6. Apply a thin coat hydro fluid to the rubber gasket
on the replacement filter.
7. Install replacement hydraulic filter onto the filter
adapter. Do not tighten.
8. Remove plastic bag from reservoir opening and
allow filter to fill with hydraulic fluid.
9. When the hydraulic filter is full, turn the oil filter
clockwise until the rubber gasket contacts the filter
adapter, then tighten the filter an additional 1/2 turn
(Figure 55).
10. Clean up any spilled fluid.
11. If there is no fluid, add Mobil 1 15W-50 synthetic
motor oil or equivalent synthetic oil to approximately
1/4 inch (6 mm) below the top of reservoir baffle.
Important: Use oil specified or equivalent.
Other fluids could cause system damage.
12. Start engine and let run for about two minutes to
purge air from the system. Stop the engine and
check for leaks. If one or both wheels will not drive,
refer to Bleeding Hydraulic System.
13. Recheck level and add fluid, if required. Do not
overfill.
Bleeding the Hydraulic System
The traction system is self bleeding, however, it may be
necessary to bleed the system if fluid is changed or after
work is performed on the system.
Air must be purged from the hydraulic system when any
hydraulic components, including oil filter, are removed
43
Figure 55
3. Adapter