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Hydraulic System
Maintenance
The reservoir is filled at the factory with approximately
4.7 liters (5 quarts) of high quality tractor
transmission/hydraulic fluid. The recommended
replacement fluid is as follows:
Toro Premium Transmission/Hydraulic Tractor Fluid
(Available in 5 gallon pails or 55 gallon drums. See parts
catalog or Toro distributor for part numbers.)
Alternate fluids: If the Toro fluid is not available, Mobil® 424
hydraulic fluid may be used.
Note: Toro will not assume responsibility for damage caused
by improper substitutions.
Note: Many hydraulic fluids are almost colorless, making it
difficult to spot leaks. A red dye additive for the hydraulic
system oil is available in 20 ml (2/3 oz.) bottles. One bottle
is sufficient for 15-22 1iters (4-6 gal) of hydraulic oil. Order
part number 44-2500 from your authorized Toro distributor.
Checking the Hydraulic
System
Service Interval: Before each use or daily
Check the level of the hydraulic fluid before the engine is first
started and daily thereafter.
1. Position the machine on a level surface. Place the
controls in the neutral locked position and start the
engine. Run engine at lowest possible RPM to purge
the system of air. Do not engage the PTO. Raise
the deck to extend lift cylinders, stop the engine, and
remove the key.
2. Raise the seat to access the hydraulic fluid tank.
3. Remove the hydraulic fill cap (Figure 68) from filler
neck.
1. Dipstick
4. Remove the dipstick and wipe it with a clean rag
(Figure 68).
5. Place the dipstick into the filler neck; then remove it
and check level of fluid (Figure 68).
If level is not within notched area of the dipstick, add
enough high quality hydraulic fluid to raise level to
within the notched area. Do not overfill.
6. Replace the dipstick and thread the fill cap finger-tight
onto filler neck.
7. Check all hoses and fittings for leaks.
Changing the Hydraulic Oil
and Filter
Service Interval: After the first 200 hours
Every 800 hours
Initially, replace the hydraulic oil filter after the first 200 hours
of operation.
Replace the filter and oil after every 800 hours of operation.
1. Disengage the PTO, move the motion control levers to
the neutral locked position and set the parking brake.
2. Move the throttle lever to the Slow position, stop the
engine, remove the key, and wait for all moving parts to
stop before leaving the operating position.
3. Place a large pan under the hydraulic reservoir and
transmission case and remove the plugs, draining all of
the hydraulic fluid (Figure 69).
52
Figure 68
2. Fill cap
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