Adjusting By-Pass Valve - Toro 30187 Operator's Manual

Maintenance
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 the rear of machine until wheels are off the
floor 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 level.
5. Repeat procedure on opposite wheel.
Check 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.
POTENTIAL HAZARD
Hydraulic fluid escaping under pressure
can penetrate skin and cause injury.
WHAT CAN HAPPEN
Fluid accidentally injected into the skin
must be surgically removed within a few
hours by a doctor familiar with this form of
injury or gangrene may result.
HOW TO AVOID THE HAZARD
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.
34

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.
Test Procedure
1. Start engine and run for 5 minutes at 3/4 throttle,
to warm hydraulic fluid.
2. Drive the machine to a clear and level open area
such as a driveway.
IMPORTANT: There should be at least 10
feet of clear area in front of the machine.
3. Loosen the quick release levers and push the
reference bar forward to the "FAST" position.
Lock the quick release levers to secure the
reference bar.
4. Move throttle control to 3/4 throttle.
5. Quickly push the upper control bar against the
reference bar. The front caster wheels should
almost lift off the ground. If front caster wheels
lift the off the ground , the machine is too
aggressive and adjustment is required.
6. Move the engine throttle to the "FAST" position.
7. Quickly push the upper control bar against the
reference bar. The front caster wheels should lift
approximately 1 inch off the ground. If front
caster wheels lift the off the ground more than 2
inches, the machine is too aggressive.
Adjustment is required.
8. If the machine accelerates slowly, and the front
caster wheels do not lift off the ground, the
machine is too un–responsive. Adjustment is
required.