Hydraulic System Maintenance; Servicing The Hydraulic System - Toro 74410 Operator's Manual

Hydraulic System
Maintenance
Servicing the Hydraulic
System
Checking the Hydraulic Fluid
Service Interval: After the first 8 hours
Every 25 hours
Fluid Type: Mobil 1 15W-50 synthetic motor oil or
equivalent synthetic oil.
Important: Use oil specified or equivalent. Other
fluids could cause system damage.
Hydraulic System Oil Capacity: 67 ounces (2.0 l)
Check the hydraulic fluid level:
• Before the engine is first started.
• After the first 8 operating hours.
• After every 25 operating hours.
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 filler neck of hydraulic tank
(Figure 55).
3. Remove the cap from the filler neck. Look inside to
check if there is fluid in the reservoir (Figure 55).
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 in
Operation , page 12.
6. Recheck the fluid level while the fluid is warm. The
fluid should be between cold and hot.
7. If required, add fluid to the hydraulic tank.
Note: The fluid level should be to the top of the hot
level of the baffle, when the fluid is hot (Figure 55).
8. Install the cap on filler neck.
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 and Oil
Service Interval: After the first 25 hours
Yearly
Change the hydraulic filter and oil:
• 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)
42
Figure 55
3. Cold fluid level-full
4. Hot fluid level-full