Adjusting By-Pass Valve - Toro 30335 Operator's Manual

Figure 33
1. Hydraulic filter
4. Apply a thin coat hydro fluid to the rubber gasket on
the replacement filter (Fig. 34).
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. 34).
1
Figure 34
1. Hydraulic filter
2. Gasket
8. If there is no fluid, add fluid to reservoir
approximately a 1/4 in. (6 mm) below the top of
baffle.
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 32.
10. Recheck level while fluid is warm. Add fluid to raise
level to top of the baffle, if required. Do not overfill.
1
m–5208
3
2
m–1256
3. Adapter
32
Bleeding 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.
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.

Adjusting By-pass Valve

The by–pass valve is adjustable to ensure easy operation
with a variety of deck sizes. If the front of the deck lifts
off the ground when the upper control bar is quickly
pushed forward or the machine is unable to drive up hills,
an adjustment may be needed.