Operator's Manual
18
3. If the coolant is low, remove the reserve tank cap and
add a 50/50 mixture of water and permanent ethylene
glycol antifreeze. Do not overfill.
4. Install the reserve tank cap.
Checking the Hydraulic
System Fluid
Recommended Hydraulic Fluid
The hydraulic system is designed to operate on anti-wear
hydraulic fluid. The machine’s reservoir is filled at the
factory with approximately 5.5 gallons (20.8 l) of ISO VG
46/48 hydraulic fluid. Check level of hydraulic fluid
before engine is first started and daily thereafter.
Appropriate hydraulic oils are listed below.
Important Use only types of hydraulic fluids
specified. Other fluids could cause system damage.
Note: A red dye additive for the hydraulic system fluid is
available in 2/3 oz. bottles. One bottle is sufficient for 4–6
gallons of hydraulic fluid. Order Part No. 44-2500 from
your Authorized Toro Distributor. We do not recommend
the use of red dye additive for biodegradable fluid. Use
food coloring instead.
Group 1 Hydraulic Fluid (Moderate climate—average
duty)
Note: The fluids within this group are interchangeable.
ISO VG 46/68 multi-viscosity anti-wear hydraulic
fluid
Mobil DTE 15M
Amoco Rykon Premium ISO 46
Castrol AWH 46
Conoco Hydroclear AW MV46
Gulf Harmony HVI 46 AW
Kendall Hyken Golden MV SAE 5W-20
Pennzbell AWX MV46
Phillips Magnus A KV 5W-20
Shell Tellus T 46
Sunoco Sun Hyd. Oil 2105
Texaco Rando HDZ 46
Universal Tractor Hydraulic Fluid
Mobil Mobilfluid 424
Amoco 1000 Fluid
Chevron Tractor Hydraulic Fluid
Conoco Hydroclear Powertran
Esso Hydraul
Gulf Universal Tractor Fluid
Kendall Hyken 052
Marathon Marafluid Super HT
Pennzoil Hydra-trans
Phillips HG Fluid
Shell Donax TD
76 Lubricants Hydraulic/Tractor Fluid
Sunoco TH Fluid
Texaco TDH
Group 2 Hydraulic Fluid (Hot Climate—Heavy Duty)
Note: The fluids within this group are interchangeable.
ISO VG 68 anti-wear hydraulic fluid
Mobil DTE 26
Amoco Rykon AW No. 68
Castrol AWS 68
Chevron Hydraulic Oil AW ISO 68
Conoco Hydroclear AW 68
Exxon Nuto H 68
Gulf Harmony 68AW
Kendall Four Seasons AW 68
Marathon ISO 68
Pennzbell AW Hydraulic Oil 68
Phillips Magnus A ISO 68
Shell Tellus 68
76 Lubricants AW 68
Sunoco SunVis 868
Texaco Rando HD 68
Important Group 1 fluids are recommended for use at
typical ambient temperatures of 32F (0C) to 105F
(41C). The ISO Type 46/48 fluid has been found to offer
optimal performance in a wide range of temperature
conditions for the average user. The Universal Tractor
Fluids offer similar performance for those who prefer
them, with perhaps some slight loss of efficiency at high
ambient temperatures compared to the Type 46/48 fluids.
Group 2 fluids are recommended for heavy-duty use in hot
climates where ambient temperatures range from about
70F (20C) to 120F (49C). Use at lower ambient
temperatures may result in hard starting, increased engine
laboring while cold, sluggish or non-operating spool
valves while cold and high filter back-pressure due to the
higher viscosity of these fluids.
Note: When changing from one type of hydraulic fluid to
another, be certain to remove all the old fluid from the
system, as some fluids are incompatible with others.
Group 3 Hydraulic Fluid (Biodegradable)
ISO VG 32/46 anti-wear hydraulic fluid
Mobil EAL 224H
Note: This biodegradable hydraulic fluid is not
compatible with the fluids in Group 1 and 2.