Hydraulic System Maintenance; Changing The Hydraulic Oil And Filter - Toro 04383 Operator's Manual

compound off of the cutting units. Adjust cutting unit
reel to bedknife as needed. Move the cutting unit reel
speed control to the desired mowing position.
Important: If the backlap lever is not returned
to the "F" position after backlapping, the cutting
units will not raise or function properly.
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 57). 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.
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 approximately 5.5
gallons of hydraulic oil; refer to Servicing Hydraulic
System Fluid.
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.
45
Figure 57