Bleeding The Hydraulic System - Toro 30440 Operator's Manual

Change the hydraulic filter:
• After the first 200 operating hours.
• Yearly, before storage.
1. Position machine on a level surface, stop the engine,
and remove key from ignition switch.
Important Do not substitute automotive oil filter or
severe hydraulic system damage may result.
2. Remove hydro cap and temporarily cover opening
with a plastic bag and rubber band to prevent all hydro
fluid from draining out.
3. Place 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 hydro fluid to the rubber gasket on
the replacement filter (Fig. 52).
5. Install replacement hydraulic filter onto the filter
adapter. Do not tighten.
6. Remove plastic bag from tank opening and allow filter
to fill with hydro fluid.
7. When fluid overflows filter turn the oil filter clockwise
until the rubber gasket contacts the filter adapter, then
tighten the filter an additional 1/2 turn (Fig. 52).
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m–6575
41
1
Figure 52
1. Hydraulic filter
2. Gasket
8. If there is no fluid or it is low, add fluid to reservoir
until it reaches the cold level baffle (Fig. 50).
9. 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
Bleeding Hydraulic System, page 41.
10. Recheck the fluid level while it is hot. Add fluid to
raise the level to top of the baffle, 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.
1. Raise rear of the machine so wheels are off the ground
and support with jack stands.
2. Start the engine and run at idle speed. Engage 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 minute).
4. Check hydraulic fluid level as it drops and add as
required to maintain proper level.
5. Repeat procedure on opposite wheel.
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2
m–1256
3. Adapter