Replacing The Hydraulic Filter And Oil - Toro 74255 Operator's Manual

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 and Oil
Change the hydraulic filter:
• After the first 25 operating hours.
• Change yearly after the first 25 operating hours.
Use summer filter above 32°F (0°C)
Use winter filter below 32°F (0°C)
1. Disengage the PTO, move the motion control
levers to the neutral locked position and set
the parking brake.
2. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
Important: Do not substitute automotive
oil filter or severe hydraulic system damage
may result.
3. Place drain pan under filter, remove the old
filter and wipe the filter adapter gasket surface
clean (Figure 65).
Figure 65
1. Hydraulic lter
4. Apply a thin coat hydro fluid to the rubber
gasket on the replacement filter (Figure 66).
Figure 66
1. Hydraulic lter
2. Gasket
5. Install the replacement hydraulic filter onto the
filter adapter. Do not tighten.
6. Fill the hydraulic tank with hydraulic fluid until
the fluid overflows the filter and then turn
the oil filter clockwise until the rubber gasket
contacts the filter adapter, then tighten the
filter an additional 1/2 turn (Figure 66).
7. Clean up any spilled fluid.
8. Add fluid to the cold level of the baffle in the
hydraulic tank.
9. Start the engine and let it run for about two
minutes to purge air from the system. Stop
the engine and check for leaks. If one or both
wheels will not drive, refer Bleeding Hydraulic
System.
10. Recheck the fluid level while the fluid is warm.
The fluid should be between cold and hot.
11. If required, add fluid to the hydraulic tank. Do
not overfill.
48
3. Adapter