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

forward to start the backlapping operation on the
designated reels.
8. Apply lapping compound with a long handle brush.
Never use a short handled brush.
9. If the reels stall or become erratic while backlapping,
select a higher reel speed setting until the speed
stabilizes, then return the reel speed to setting 1 or
to your desired speed.
10. To make an adjustment to the cutting units while
backlapping, turn the reels off by moving the
Raise/Lower Mow control rearward and stop the
engine. After completing adjustments, repeat steps 4
through 8.
11. Repeat the procedure for all cutting units you want
to backlap.
12. When finished, return the backlap levers to the
"F" position, lower the seat, and wash all lapping
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.
47
Figure 57