Servicing The Hydraulic System - Toro 74179 Operator's Manual

Figure 43
1. Valve stem

Servicing the Hydraulic System

Checking the Hydraulic Fluid
Check the hydraulic fluid level before engine is first
started.
Check the hydraulic fluid level after first 8 operating hours.
Check the hydraulic fluid level after every 25 operating
hours.
Fluid Type: Mobil 1 15W-50 synthetic motor oil or
equivalent synthetic oil.
Important
Use the oil specified or equivalent. Other
fluids could cause system damage.
Hydraulic System Oil Capacity: 67 oz. (2 l)
Note: There are two ways of checking the hydraulic oil.
One is when the oil is warm and one is when the oil is cold.
The baffle inside the tank has two levels depending if the
oil is warm or cold.
1. Position the machine on a level surface and set the
parking brake.
2. Clean the area around the filler neck of the hydraulic
tank (Fig. 44).
3. Remove the cap from the filler neck. Look inside to
check if there is fluid in the reservoir (Fig. 44).
4. If there is no fluid, add fluid to the reservoir until it
reaches the cold level of the baffle.
5. Run the machine at low idle for 15 minutes to allow any
air to purge out of the system and warm the fluid; refer
to Starting and Stopping the Engine, page 18.
6. Recheck the fluid level while the fluid is warm. If
required, add fluid to the reservoir until it reaches the
hot level of the baffle.
Note: The fluid level should be to the top of the hot level
of the baffle, when the fluid is warm (Fig. 44).
7. Install the cap on the filler neck.
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1
4
m–1872
1. Cap
2. Baffle
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
If hydraulic fluid is injected into the skin it must
be surgically removed within a few hours by a
doctor familiar with this type of injury.
Gangrene may result if this is not done.
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.
Safely relieve all pressure in the hydraulic
system before performing any work on the
hydraulic system.
Make sure all hydraulic fluid hoses and lines are
in good condition and all hydraulic connections
and fittings are tight before applying pressure to
hydraulic system.
Replacing the Hydraulic Filter
Change the hydraulic filter:
After the first 8 operating hours.
After every 200 operating hours.
1. Position machine on a level surface, stop the engine,
and remove the key.
Important
filter or severe hydraulic system damage may result.
2. Remove the hydro cap and temporarily cover the
opening with a plastic bag and rubber band to prevent
all hydro fluid from draining out.
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1
Figure 44
3. Cold fluid level—full
4. Hot fluid level—full
Warning
Do not substitute with an automotive oil
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m–5615