Hydraulic System Maintenance; Draining Water From The Hydraulic Reservoir; Changing The Hydraulic Fluid; Changing The Hydraulic Filter - Toro 03706 Operator's Manual

Hydraulic System
Maintenance
Draining Water from the
Hydraulic Reservoir
Service Interval: Every 100 hours
Before draining, allow machine to set about 8 hours to
allow water to settle to bottom of reservoir.
1. Open the drain plug (Figure 42) one-half turn and
allow the fluid to flow into drain pan until you do
not notice water in the hydraulic fluid.
Figure 42
1. Drain plug
2. Tighten the drain plug and add hydraulic fluid; refer
to Checking and Adding Hydraulic Fluid.

Changing the Hydraulic Fluid

Service Interval: Every 1,500 hours/Every 2 years
(whichever comes first)
If fluid becomes contaminated, contact your local
Toro distributor because the system must be flushed.
Contaminated fluid looks milky or black when compared
to clean oil.
1. Remove the drain plug (Figure 42) from the
reservoir and let the hydraulic oil flow into a drain
pan. Tighten the plug when the hydraulic oil stops
draining.
2. Fill the reservoir with hydraulic fluid; refer to
Checking/Adding the Hydraulic Fluid.
Important: Use only the hydraulic fluids
specified. Other fluids could cause system
damage.
3. Install the reservoir cover, lower the seat, and secure
it with the lock pin.
4. Start the engine, run it slowly, and use all of the
hydraulic controls to distribute hydraulic fluid
throughout the system. Also check for leaks, then
stop the engine.
5. With cutting units up and oil warm, look into the
sight glass (Figure 43). If the hydraulic fluid is not
even with the arrows, add enough fluid to raise it to
the proper level. Do not fill full if the fluid is cold.
1
1. Sight glass arrows

Changing the Hydraulic Filter

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Service Interval: After the first 50 hours
Use Toro replacement filter Part No. 86-6110.
Important: Use of any other filters may void the
warranty on some components.
Note: Under certain conditions, a bypass valve in
the filter mounting plate allows oil to bypass the filter.
Before the filter starts to bypass, a warning light on the
steering console will illuminate. The warning light may
come on momentarily when the oil is cold. If the light
does not go out after the oil is warm, the filter is clogged
or an electrical problem exists. Correct the problem
before commencing operation.
1. Remove the seat lock pin, raise the seat, and hold it
open with the support rod. Also, remove the panel
(secured with magnets) ahead of the seat.
2. Clean around the filter mounting area (Figure 44).
Place a drain pan under the filter and remove the
filter.
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1
Figure 43
Every 800 hours/Yearly (whichever
comes first)
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