Hydraulic System Maintenance; Servicing The Hydraulic System; Changing The Hydraulic-System Filter And Oil - Toro 74141 Operator's Manual

Hydraulic System
Maintenance
Servicing the Hydraulic
System
Hydraulic Oil Type: Toro
or 20W-50 engine oil.
Important: Use oil specified. Other fluids could cause
system damage.
Hydraulic System Capacity (with filters removed): 4.45
L (150 oz)
Checking the Hydraulic-Oil Level
Service Interval: Every 25 hours
1. Allow the hydraulic oil to cool down, and check the oil
level when the oil is cold.
2. Check the expansion reservoir, and, if necessary, add
Toro ® HYPR-OIL ™
COLD line.
Figure 68
1. Expansion reservoir
Changing the
Hydraulic-System Filter
and Oil
The filter and oil are changed at the same time. Do not use
the oil again. Once the new filter is installed, and the oil is
added, any air in the system must be purged.
The bleeding process is repeated until the oil remains at the
FULL COLD line in the reservoir after purging. Failure to
® HYPR-OIL ™ 500 hydraulic oil
500 hydraulic oil to the FULL
G017452
1
2
G017451
2. FULL COLD line
properly perform this procedure can result in irreparable
damage to the transaxle drive system.
Removing Hydraulic-System Filters
1. Stop the engine, wait for all moving parts to stop, allow
the engine to cool, remove the key, and engage the
parking brake.
2. Locate the filter and guards on each transaxle-drive
system (Figure 69).
3. Remove three screws securing the filter guard and
guard (Figure 69).
5
3
4
G017444
Right side shown
1. Transaxle drive
2. Oil filter
3. Filter guard
4. Carefully clean the area around the filters.
Important: Do not allow dirt to enter the
hydraulic system, or contamination may occur.
5. Place a drain pan below the filter to catch the oil that
drains when the filter and vent plugs are removed.
6. Locate and remove the vent plug on each transmission
7. Unscrew the filter to remove it, and allow the oil to
drain from drive system.
8. Repeat this procedure for both filters.
Installing the Hydraulic-System Filters
Service Interval: After the first 50 hours
Every 400 hours
1. Apply a thin coat of oil on the surface of the rubber
seal of each filter.
2. Turn the filter clockwise until the rubber seal contacts
the filter adapter, then tighten the filter an additional
3/4 to 1 full turn.
48
Figure 69
4. Screws
5. Vent plug
1
2