Toro 74239 Operator's Manual page 39

3. Place a drain pan under filter, remove the old filter and
wipe the filter adapter gasket surface clean (Fig. 51).
Figure 51
1. Hydraulic filter
4. Apply a thin coat of hydro fluid to the rubber gasket
on the replacement filter (Fig. 52).
5. Install the replacement hydraulic filter onto the filter
adapter. Do not tighten.
6. Fill the hydraulic tank with hydraulic fluid until the
fluid overflows the filter.
7. When fluid overflows the filter turn the hydraulic oil
filter clockwise until the rubber gasket contacts the
filter adapter, then tighten the filter an additional 1/2
turn (Fig. 52).
8. Clean up any spilled fluid.
9. Add fluid to the cold level of the baffle in the
hydraulic tank, refer to Checking the Hydraulic Fluid
on page 38.
10. Start the engine and let it 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
Bleeding Hydraulic System, page 39.
11. Recheck level while fluid is warm. Add fluid to raise
level to top of the baffle, if required. Do not overfill.
1
Figure 52
1. Hydraulic filter
2. Gasket
1
M–4763
3
2
m–1256
3. Adapter
39
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.
1. Raise rear of the machine so wheels are off the ground
and support with jack stands.
2. Start the engine and run at low idle speed. Engage the
lever and traction on one side and spin the wheel by
hand.
3. When the wheel begins to spin on its own, keep it
engaged until wheel drives smoothly. (minimum
2 minutes)
4. Check hydraulic fluid level and add as required to
maintain proper level.
5. Repeat this procedure on the opposite wheel.
Checking the Hydraulic Lines
After every 100 operating hours, check hydraulic lines and
hoses for leaks, loose fittings, kinked lines, loose
mounting supports, wear, weather and chemical
deterioration. Make necessary repairs before operating.
Note: Keep areas around hydraulic system clean from
grass and debris build up.
Warning
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.