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Replacing the Hydraulic Filter
Initially, change filter after the first 50 operating hours,
thereafter, every 800 operating hours or annually,
whichever comes first.
Only the Toro replacement filter (Part No. 86-3010) can be
used in the hydraulic system.
Important
Use of any other filter may void the
warranty on some components.
1. Turn engine off, release hood latch and raise hood.
2. Clean area around filter mounting area (Fig. 48). Place
drain pan under filter and remove filter.
1
Figure 48
1. Hydraulic filter
3. Lubricate new filter gasket and fill the filter with
hydraulic oil.
4. Ensure filter mounting area is clean. Screw filter on
until gasket contacts mounting plate. Then tighten filter
one half turn.
5. Start engine and let run for about two minutes to purge
air from the system. Stop the engine and check oil level.
Also check for any leaks.
Checking the Hydraulic Lines
and Hoses
Check hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings, weather
deterioration and chemical deterioration. Make all
necessary repairs before operating.
Warning
Keep body and hands away from pin hole leaks or
nozzles that eject high pressure hydraulic fluid.
Use cardboard or paper to find hydraulic leaks.
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury. Fluid accidentally
injected into the skin must be surgically removed
within a few hours by a doctor familiar with this
form of injury or gangrene may result.
Checking the Hydraulic System
Test Ports
The test ports are used to test the hydraulic circuits. Check
all pressures when engine is at full speed and hydraulic oil
is at normal operating temperature. Contact your local Toro
distributor for assistance.
Traction Forward and Reverse (Fig. 49) have a normal
relief setting of approximately 6000 psi.
Normal charge pressure is 100–140 psi (689–965 kPa).
1
2
1. Traction forward circuit
Cutting unit Counterbalance normal setting is
approximately 600–650 psi (4137–4482 kPa) at high idle
and when oil is warm.
Lift circuit relief pressure is approximately 2600–2800 psi
(17,926–19,305 kPa) when oil is warm.
Steering Circuit has a normal relief setting of
approximately 1200 psi (8274 kPa) at high idle and warm
oil.
34
Figure 49
2. Traction reverse circuit
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