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Replacing the Hydraulic Oil
Filter
The hydraulic oil filter keeps the hydraulic system
relatively free of contaminants and must be serviced at
regular intervals. Initially, change the filter after
first ten hours of engine operation, and thereafter,
after every 125 hours of operation or yearly,
whichever comes first. Use Toro oil filter, Part No.
23-9740, as a replacement.
1.
Clean the area where the hydraulic oil filter
mounts. Remove the filter from the base (Fig.
48) and clean the filter mounting surface.
2.
Lubricate the filter gasket with proper viscosity
and type oil. Then fill the filter using the same
oil.
3.
Install the filter by hand until the gasket contacts
the mounting head. Then rotate an additional
turn.
4.
Start the engine and check for hydraulic oil leaks.
Allow the engine to run for about two minutes so
any air in the system is purged (removed).
5.
Shut the engine off and check the fluid level of
hydraulic system; refer to Checking the
Hydraulic System Oil, page 14.
1
Figure 48
1. Hydraulic oil filter
Changing the Hydraulic System
Oil
The hydraulic system oil must be changed after every
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
1
⁄
2
(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
36
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
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