47
Replacing the Hydraulic Fluid
Filter
The hydraulic fluid filter keeps the hydraulic system
relatively free of contaminants and must be serviced at
regular intervals. Initially, change filter after first ten
hours of engine operation, and thereafter, after every
200 hours of operation or yearly, whichever comes first.
Use Toro oil filter, Part No. 23-9740, as a replacement.
1. Clean area where hydraulic fluid filter mounts. Remove
filter from base (Fig. 69) and clean filter mounting
surface.
1
Figure 69
1.
Hydraulic oil filter
2. Lubricate filter gasket with proper type of hydraulic
fluid. Then fill filter using the same hydraulic fluid.
3. Install filter by hand until gasket contacts mounting
head. Then rotate an additional 1/2 turn.
4. Start engine and check for hydraulic fluid leaks. Allow
engine to run for about two minutes so any air in the
system is purged (removed).
5. Shut engine off and check level of hydraulic system;
refer to Checking the Hydraulic System Oil, page 26.
Changing the Hydraulic
System Fluid
The hydraulic system fluid must be changed after every
1000 hours of normal operation or every two years,
whichever comes first.
The following list is not assumed to be all–inclusive.
Hydraulic fluids produced by other manufacturers may be
used if they can cross reference to find an equivalent to the
products listed. Toro will not assume responsibility for
damage caused by improper substitutions, so use only
products from reputable manufacturers who will stand
behind their recommendation.
Universal Tractor Hydraulic Fluid
Mobil
Mobil Fluid 424
Amoco
1000 Fluid
Chevron
Tractor Hydraulic Fluid
Conoco
Power–Tran 3
Exxon
Torque Fluid
Pennzoil
Hydra–Tranz
Shell
Donax TD
Texaco
TDH
Note: Many hydraulic fluids are almost colorless, making it
difficult to spot leaks. A red dye additive for the hydraulic
system oil is available in 2/3 oz. (20 ml) bottles. One bottle
is sufficient for 4–6 gal (15–22 1) of hydraulic oil. Order
part no.44–2500 from your authorized Toro distributor.
1. Start engine, park machine on a level surface, lower
implement to the shop floor, set the parking brake, and
shut engine off. Block the two rear wheels.
2. Jack up both sides of front axle and support it with jack
stands.
3. Clean area around hydraulic fluid filter and remove
filter.
4. Remove drain plug from fitting between axle housing
and oil filter and allow fluid to flow into drain pan
(Fig. 70).
1
Figure 70
1.
Drain plug
5. Install new filter; refer to steps 1–2 in Replacing
Hydraulic Oil Filter, for proper procedures.
6. Install drain plug in fitting between axle housing and
filter (Fig. 70).
7. Remove dipstick from axle filler tube (Fig. 71) and fill
axle to proper level with correct type of hydraulic fluid;
refer to table above.
Summary of Contents for Groundsmaster 328-D
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