Hydraulic System Maintenance; Changing The Hydraulic Oil And Filter; Checking The Hydraulic Lines And Hoses - Toro 04520 Operator's Manual

Hydraulic System
Maintenance
Changing the Hydraulic Oil
and Filter
Service Interval: After the first 50 hours
Every 800 hours
If the oil becomes contaminated, contact your local Toro
distributor because the system must be flushed. Contaminated
oil looks milky or black when compared to clean oil.
1. Clean the area around the filter mounting area (Figure
52). Place a drain pan under the filter and remove the
filter.
Note: If the oil is not going to be drained, disconnect
and plug the hydraulic line going to the filter.
Figure 52
1. Hydraulic oil filter
2. Fill the replacement filter with the appropriate hydraulic
fluid, lubricate the sealing gasket, and hand turn it until
the gasket contacts the filter head. Then tighten 3/4
turn further. The filter should now be sealed.
3. Fill the hydraulic reservoir with hydraulic oil; refer to
Filling the Hydraulic Tank (page 27).
4. Start the machine and run it at idle for 3 to 5 minutes
to circulate the fluid and remove any air trapped in
the system.
5. Stop the machine, recheck the fluid level and replenish
as required.
6. Dispose of the oil and filter properly.
Checking the Hydraulic Lines
and Hoses
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• Make sure all hydraulic fluid hoses and lines are
• Keep your body and hands away from pin
• Use cardboard or paper to find hydraulic leaks.
• Safely relieve all pressure in the hydraulic system
• Get immediate medical help if fluid is injected
Check the hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings, weather
deterioration, and chemical deterioration. Make all necessary
repairs before operating.
1
g014619
43
WARNING
in good condition and all hydraulic connections
and fittings are tight before applying pressure to
the hydraulic system.
hole leaks or nozzles that eject high pressure
hydraulic fluid.
before performing any work on the hydraulic
system.
into skin.