Changing Hydraulic Oil; Replacing Hydraulic Filter; Replacing Hydraulic System Breather - Toro 03706 Operator's Manual

Changing Hydraulic Oil

Normally, change hydraulic oil after every 2 years or 1500
operating hours. If oil becomes contaminated, contact your
local TORO distributor because the system must be
flushed. Contaminated oil looks milky or black when
compared to clean oil.
1. Remove drain plug (Fig. 42) from reservoir and let
hydraulic oil flow into drain pan. Tighten plug when
hydraulic oil stops draining.
2. Fill reservoir with approximately 9.3 gallons of
hydraulic oil. Refer to Checking the Hydraulic Oil.
Important Use only hydraulic oils specified. Other
fluids could cause system damage.
3. Install reservoir cover, lower seat and secure with lock
pin. Start engine, run slowly and use all hydraulic
controls to distribute hydraulic oil throughout the
system. Also check for leaks. Then stop the engine.
4. With cutting units up and oil warm, look into sight glass
(Fig. 40). If hydraulic oil is not even with arrows, add
enough to raise to proper level. Do not fill full if oil is
cold.

Replacing Hydraulic Filter

Initially, change filter after the first 50 operating hours,
thereafter, every 800 operating hours, annually, or on
indication.
Use Toro replacement filter (Part No. 86–6110).
Important Use of any other filter may void the
warranty on some components.
1. Remove seat lock pin, raise seat and hold open with
support rod. Also remove panel (secured with magnets)
ahead of the seat.
2. Clean area around filter mounting area (Fig. 43). Place
drain pan under filter and remove filter.
3. Lubricate new filter gasket and fill the filter with
hydraulic oil.
4. Assure filter mounting area is clean. Screw filter on
until gasket contacts mounting plate. Then tighten filter
one–half turn.
5. Start engine and let it run slowly for about two minutes
to purge air from the system. Stop the engine and check
for leaks.
1. Hydraulic Filter
6. Look into sight glass (Fig. 40). Hydraulic oil level
should be even with arrows when oil is warm. If level
is low, add hydraulic oil to the reservoir.
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 problem before
commencing operation.
Replacing Hydraulic System
Breather
Change hydraulic system breather after every 800
operating hours, or annually, whichever comes first. More
often in extremely dusty or dirty conditions.
1. Release latches and open engine cover.
2. Clean around the breather and unscrew it with a wrench
(Fig. 44). Install new breather.
1
1. Breather
3. Close engine cover and latch securely.
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1
Figure 43
Figure 44