Bleeding The Hydraulic System - Toro 74280TE Operator's Manual

Figure 66
1. Hydraulic lter
4. Apply a thin coat to the rubber gasket on the
replacement filter (Figure 67).
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 and then turn
the oil filter clockwise until the rubber gasket
contacts the filter adapter, then tighten the
filter an additional 1/2 turn (Figure 67).
7. Clean up any spilled fluid.
8. Add fluid to the cold level of the baffle in the
hydraulic tank.
9. 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 to Bleeding
Hydraulic System.
10. Recheck the fluid level while the fluid is warm.
The fluid should be between cold and hot.
11. If required, add fluid to the hydraulic tank. Do
not overfill.
Figure 67
1. Hydraulic lter
2. Gasket
3. Adapter
Replacing the Cooling Fan Hydraulic
Filter
Replace the cooling fan hydraulic filter:
• After every 500 operating hours.
• After any part of the hydraulic cooling fan
system is repaired or replaced.
1. Place drain pan under filter, remove the
hydraulic hose from the filter (Figure 68).
2. Remove the cooling fan hydraulic filter from
the T-fitting on the bottom of the filter
(Figure 68).
Figure 68
1. Cooling fan hydraulic lter 3. Hydraulic hose
2. Back of machine
3. Install the filter to the T-fitting on the bottom
and the hydraulic hose to the top (Figure 68).

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.
52
4. T-tting