Checking The Hydraulic System - Toro 03170 Operator's Manual

1. Expansion tank
Note: With a cold engine, the coolant level should
be approximately midway between the marks on the
side of the tank.
2. If the coolant level is low, remove the expansion
tank cap and replenish the system. Do not overfill.
3. Install the expansion tank cap.
Checking the Hydraulic
System
Service Interval: Before each use or daily—Check the
hydraulic fluid level.
The hydraulic fluid tank is filled at the factory with
approximately 3.5 U.S. gallons (13.2 l) of high-quality
hydraulic fluid. Check the level of the hydraulic
fluid before the engine is first started and daily
thereafter. The recommended replacement fluid
is Toro Premium All Season Hydraulic 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, other
fluids may be used provided they meet all the following
material properties and industry specifications. Toro
does not recommend using synthetic fluid. Consult with
a lubricant distributor to identify a satisfactory product.
Note: Toro will not assume responsibility for damage
caused by improper substitutions, so use only products
from reputable manufacturers who will stand behind
their recommendation.
High Viscosity Index/Low Pour Point Anti-wear Hydraulic
Fluid, ISO VG 46
Material Properties:
Viscosity, ASTM D445
Viscosity Index ASTM
D2270
Figure 39
cSt @ 40°C 44 to 48
cSt @ 100°C 7.9 to 8.5
140 to 160
Pour Point, ASTM D97
Industry Specifications:
Vickers I-286-S (Quality Level), Vickers M-2950-S
(Quality Level), Denison HF-0
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 2/3 oz. (20 ml)
bottles. One bottle is sufficient for 4-6 U.S. gallons
(15-22 1) of hydraulic oil. Order part no. 44-2500 from
an authorized Toro distributor.
Biodegradable Hydraulic Fluid—Mobil 224H
Toro Biodegradable Hydraulic Fluid (Available in 5 gallon
pails or 55 gallon drums. See parts catalog or a Toro
distributor for part numbers.)
Alternate fluid: Mobil EAL 224H
This is vegetable-oil based biodegradable oil tested and
approved by Toro for this model. This fluid is not
as resistant to high temperatures as standard fluid, so
install an oil cooler if required by the operator manual
and follow recommended fluid change intervals with
this fluid. Contamination by mineral–based hydraulic
fluids will change the biodegradability and toxicity of
this oil. When changing from standard fluid to the
biodegradable type, be certain to follow the approved
flushing procedure. Contact a local Toro Distributor
for details.
1. Position the machine on a level surface, lower the
cutting units, and stop the engine.
2. Clean the area around the filler neck and cap of the
hydraulic fluid tank (Figure 40) and remove the cap.
1. Hydraulic fluid tank cap
3. Remove the dipstick from the filler neck and wipe
it with a clean rag. Insert the dipstick into the filler
neck; then remove it and check the fluid level. The
fluid level should be within 1/4 inch (6 mm) of the
mark on the dipstick.
29
-34°F to -49°F
Figure 40