Changing The Hydraulic System Oil - Toro 30631 Operator's Manual

250 hours of operation or seasonally, whichever
comes first. The hydraulic system is designed to
operate on any high-quality detergent oil having the
American Petroleum Institute—AP1—"service
classification" SF/CC or CD. Oil viscosity—weight—
must be selected according to anticipated ambient
temperature for the season in which product will be
used.
Expected Ambient
Temperature
(Extreme) over 32° C
(Normal) 4–37° C
(Cool) –1 to 10° C
(Winter) Below –1° C
Note: Do not mix engine oil and automatic
transmission fluid or hydraulic system component
damage may result. When changing fluids, also
change transmission filter. Do not use Dexron II
ATF.
Note: Fluid to operate the power steering is supplied
by the hydraulic system transmission charge pump.
Cold weather start-up may result in " stiff" steering
until the hydraulic system has warmed up. Using
proper weight hydraulic oil in system minimizes this
condition.
The transmission and axle housing are shipped from
the factory with approximately 5 quarts (4.7 l) of SAE
10W-30 engine oil. However, check the transmission
oil level before you first start the engine and daily
thereafter.
1. Start the engine, park the machine on a level
surface, lower the implement to the floor, set the
parking brake, and shut the engine off. Block the
two rear wheels.
2. Jack up both sides of the front axle and support it
with jack stands.
3. Clean the area around the hydraulic oil filter and
remove the filter.
Recommended
Viscosity and Type
SAE 30, Type SF/CC or CD
engine oil
SAE 10W-30 or 10W-40,
Type SF/CC or CD engine oil
SAE 5W-30, Type SF/CC or
CD engine oil
Type "F" or "FA" ATF
Automatic Transmission Fluid
4. Remove drain plug from the fitting between axle
housing and oil filter and let the oil flow into a
drain pan (Fig. 50).
1. Drain plug
5. Install a new filter; refer to steps 1–2 in
Replacing Hydraulic Oil Filter, page 14, for
proper procedures.
6. Install the drain plug in the fitting between the
axle housing and oil filter (Fig. 50).
7. Remove the dipstick from the axle filler tube
(Fig. 51) and fill the axle to proper level with
correct type and viscosity oil recommended for
expected ambient temperature conditions; refer to
table above.
8. Start and run the engine at idle speed for about
two minutes and turn the steering wheel lock to
lock to purge air trapped in the system. Shut the
engine off.
9. Let the machine sit for two additional minutes,
then remove the dipstick and check the oil level
in axle (Fig. 51). If the level is low, add oil until
the level matches the groove in the dipstick (Fig.
51). If the level is too high, remove the drain
plug (Fig. 50) and drain oil until the oil level
matches the groove in the dipstick.
36
1
Figure 50