Changing Hydraulic Oil And Filter; Checking Hydraulic Lines And Hoses; Adjusting Cutting Unit Lift/Drop - Toro 04380 Operator's Manual

Maintenance
them with hose clamps. Be sure the arrow on the
side of the filter points toward the carburetor.
Since gasoline is highly flammable, drain it
outdoors and make sure the engine is cool to
prevent a potential fire hazard. Wipe up any
gasoline that may have spilled. Do not drain
gasoline near any open flame or where gasoline
fumes may be ignited by a spark. Do not smoke a
cigar, cigarette, or a pipe when hangling gasoline.
Replacing Spark Plugs
Use a Briggs & Stratton Daihatsu #491053, champion
RC14YC spark plug or equivalent. The correct air gap is
0.030 inches. Remove plugs after every 100 operating
hours and check their condition.
CHANGING THE HYDRAULIC OIL
AND FILTER
(Fig. 22)
Initially change the hydraulic oil filter after the first 50
operating hours. After that, change the hydraulic oil and
filter after every 800 operating hours. If the oil becomes
contaminated, contact your local TORO distributor
because the system must be flushed. Contaminated oil
looks milky or black when compared to clean oil.
1. Clean the area around the filter mounting area.
Place the drain pan under the filter and remove the
filter.
Note: If the oil is not going to be drained,
disconnect and plug hydraulic line going to the
filter.
1. Hydraulic filter
2. Fill the replacement filter with Mobil 424 hydraulic
26
WARNING
Figure 22
fluid, lubricate the sealing gasket and hand turn
until the gasket contacts the filter head. Then
tighten 3/4 turn further. The filter should now be
sealed.
3. Fill the hydraulic reservoir with 20.8 L of hydraulic
oil. Refer to Check the Hydraulic System.
4. Start the machine and run it at idle for 3 to 5
minutes to circulate the fluid and remove any air
trapped in the system. Stop the machine and
recheck the fluid level.
5. Dispose of the oil properly.
CHECKING HYDRAULIC LINES
AND HOSES
WARNING
Keep your body and hands away from pin hole leaks or
nozzles that eject high-pressure hydraulic fluid. Use
cardboard or paper to find hydraulic leaks. Hydraulic
fluid escaping under pressure can penetrate your skin
and cause injury. Fluid accidentally injected into your
skin must be surgically removed within a few hours by
a doctor familiar with this form of injury or gangrene
may result.
Inspect hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings,
weather deterioration and chemical deterioration. Make
all necessary repairs before operating.
ADJUSTING CUTTING UNIT
LIFT/DROP
The machine's cutting unit lift/drop circuit is equipped
with a flow control valve. This valve is preset at the
factory at 3 turns open, but an adjustment may be
required to compensate for differences in hydraulic oil
temperatures, mowing spreads, etc. If an adjustment is
required, proceed as follows:
1. Allow hydraulic oil to reach full operating
temperature before adjusting the flow control valve.
2. Raise the seat and find the flow control valve
mounted to the hydraulic cylinder.