Hydraulic System
Maintenance
Hydraulic System Safety
•
Seek immediate medical attention if fluid is injected
into skin. Injected fluid must be surgically removed
within a few hours by a doctor.
•
Ensure that all hydraulic-fluid hoses and lines are
in good condition and all hydraulic connections
and fittings are tight before applying pressure to
the hydraulic system.
•
Keep your body and hands away from pinhole
leaks or nozzles that eject high-pressure hydraulic
fluid.
•
Use cardboard or paper to find hydraulic leaks.
•
Safely relieve all pressure in the hydraulic system
before performing any work on the hydraulic
system.
Servicing the Hydraulic
System
Hydraulic-Fluid Specifications
Hydraulic system capacity for the deck-lift power
unit:
710 ml (24 fl oz)
Recommended fluid for the deck-lift power unit:
Toro Premium Transmission/Hydraulic Tractor Fluid
(available in 5-gallon pails or 55-gallon drums. See
the
Parts Catalog
or contact an authorized Toro
distributor for part numbers.)
Hydraulic system capacity for the hydro drives:
1.5 L (52 fl oz) per hydro drive
Recommended fluid for the hydro drives:
Toro
HYPR-OIL™ 500 fluid (available in 5-gallon pails or
55-gallon drums. See the
Parts Catalog
or contact an
authorized Toro distributor for part numbers.)
Alternate fluids for the hydro drives:
If the Toro
fluid is not available, Mobil® 1 15W50 hydraulic fluid
may be used.
Note:
Toro does 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 fluid is available in 20 ml
(2/3 fl oz) bottles. 1 bottle is sufficient for 15 to 22 L
(4 to 6 gallons) of hydraulic fluid. Order Part Number
44-2500 from your authorized Toro distributor.
Checking the Hydraulic-Fluid
Level
Service Interval:
Every 50 hours
Check the hydraulic-fluid level before you first start
the engine and daily thereafter.
1.
Park the machine on a level surface, disengage
the blade-control switch, and engage the parking
brake.
2.
Move the motion-control levers to the
N
EUTRAL
-
LOCK
position and start the engine.
Note:
Run the engine at the lowest possible
rpm to purge any air in the system.
Important:
Do not engage the PTO.
3.
Wait until the machine cools before checking the
hydraulic fluid.
4.
Adjust the seat to the most forward position
to access the caps on the left and right hydro
drives.
5.
Clean the area around the hydraulic-reservoir
cap and remove the cap.
6.
Remove the dipstick and wipe it with a clean rag.
7.
Place the dipstick into the filler neck, remove it,
and check the fluid level (
Note:
If the level is not within the notched area
of the dipstick, add enough Toro HYPR-OIL™
500 fluid to raise the level to within the notched
area.
Important:
Do not overfill.
g008606
Figure 67
1.
Full line
2.
Add line
8.
Replace the dipstick and thread the fill cap
finger-tight onto the filler neck.
9.
Check all hoses and fittings for leaks.
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Summary of Contents for Air Cool Z Master 74090
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