Bleeding The Hydraulic System - Toro 74279TE Operator's Manual

Important: Do not substitute automotive oil filter
or severe hydraulic system damage may result.
3. Place drain pan under filter, remove the old filter and
wipe the filter adapter gasket surface clean
Figure 73
1. Hydraulic filter
4. Remove the right-hand hydraulic line that comes into
the adapter (Figure
5. Allow the oil to drain out of the system into the drain
pan.
6. Install the right-hand hydraulic line to the adapter
(Figure 74).
Figure 74
1. Right-hand hydraulic line
2. Hydraulic filter
7. Apply a thin coat to the rubber gasket on the
replacement filter (Figure
8. Install the replacement hydraulic filter onto the filter
adapter. Do not tighten.
9. Fill the hydraulic tank with hydraulic fluid until the fluid
overflows the filter and then turn the oil filter clockwise
until the rubber gasket contacts the filter adapter, then
tighten the filter an additional 1/2 turn
10. Clean up any spilled fluid.
11. Add fluid to the cold level of the baffle in the hydraulic
tank.
12. Start the engine and let it run for about 2 minutes to
purge air from the system. Stop the engine and check
(Figure
74).
3. Hydraulic tank
75).
(Figure
for leaks. If one or both wheels will not drive, refer to
Bleeding the Hydraulic System (page
13. Recheck the fluid level while the fluid is warm. The
73). fluid should be between cold and hot.
14. If required, add fluid to the hydraulic tank. Do not
overfill.
1. Hydraulic filter
2. Gasket

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.
75).
51
51).
Figure 75
3. Adapter