Hydraulic System Maintenance; Checking The Hydraulic System - Toro 30381 Operator's Manual

Hydraulic System
Maintenance
The hydraulic system is filled at the factory with approximately
4.7 L (5 US qt) of high-quality transmission/tractor hydraulic
fluid. The best time to check the hydraulic fluid is when it is
cold. The machine should be in the transport configuration.
If the fluid level is below the Add mark on the dipstick, add
fluid to bring the level to the middle of the acceptable range.
Do not overfill the system. If the fluid level is between the
Full mark and the Add mark, no additional fluid is required.
The recommended replacement fluid is:
Toro Premium Transmission/Hydraulic Tractor Fluid
(Available in 5 US gallon pails or 55 US gallon drums.
See the parts documentation or Toro distributor for part
numbers.)
Alternative fluids: If the Toro fluid is not available, you can
use Mobil® 424 hydraulic fluid.
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 fl oz) bottles. One bottle
is sufficient for 15 to 22 L (4 to 6 US gallons) 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.
2. Place the controls in the neutral locked position and
start the engine.
Note: Run engine at lowest possible RPM to purge
the system of air. Do not engage the PTO.
3. Raise the deck to extend lift cylinders, stop the engine,
and remove the key.
4. Raise the seat to access the hydraulic fluid tank.
5. Remove the hydraulic fill cap (Figure 89) from the filler
neck.
1. Dipstick
6. Remove the dipstick and wipe it with a clean rag
(Figure 89).
7. Place the dipstick into the filler neck; then remove it
and check level of fluid (Figure 89).
Note: 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.
8. Replace the dipstick and thread the fill cap finger-tight
onto filler neck.
9. Check all hoses and fittings for leaks.
61
Figure 89
2. Fill cap