Toro Z Master 75990 Operator's Manual page 60

Replacing the Hydraulic Filters
and Hydraulic Fluid
Service Interval: After the first 250 hours—Change
the hydraulic filters and hydraulic
fluid when using any type of fluid.
Every 250 hours—Change the hydraulic filters
and hydraulic fluid when using Mobil
(more often in dirty or dusty conditions).
Every 500 hours—Change the hydraulic
filters and hydraulic fluid when using Toro
HYPR-OIL ™ 500 hydraulic oil (more often in
dirty or dusty conditions).
To replace the hydraulic oil, the filters need to be
removed. Replace both at the same time. Refer to
the oil specifications under
System (page 59) for the correct oil.
1. Disengage the blade-control switch (PTO), move
the motion-control levers to the neutral-locked
position and engage the parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Raise the machine and support it with jack
stands (Figure 87).
Figure 87
1. Jack stands
4. Remove the mower belt and the pump-drive
belt; refer to Belt Maintenance (page
5. Place a drain pan under the filter, remove the
old filter, and wipe the surface clean
® 1 oil
®
Servicing the Hydraulic
g008970
54).
(Figure
1. Filter locations
6. Apply a thin coat of hydraulic oil to the rubber
gasket on the replacement filter
7. Install the replacement hydraulic filter.
8. Install the pump-drive belt and the mower belt.
9. Remove the jack stands and lower the machine
(Figure 87).
10. Add oil to the hydraulic reservoir and check for
any leaks.
11. Clean up any spilled oil.
12. Start the engine and let it run for 2 minutes to
purge air from the system. Shut off the engine
and check for leaks.
13. Check the oil level while the oil is cold.
14. If required, add oil to the hydraulic reservoir.
Important:
reservoir with fluid.
88).
60
Figure 88
Bottom View of Machine
2. Hydraulic filter
(Figure
Do not overfill the hydraulic
g008968
88).