27
HYDRAULIC MAINTENANCE
CHECKING 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 acci
dentally injected into the skin must be surgical
ly removed within a few hours by a doctor famil
iar with this form of injury or gangrene may re
sult.
HYDRAULIC SYSTEM TEST PORTS
(Fig. 38 & 41)
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.
1. Traction Forward and Reverse have a normal relief
setting of approximately 6000 psi.
2. Normal charge pressure is 100-140 psi.
Figure 38
1. Traction Forward Circuit
2. Traction Reverse Circuit
1
2
3. Cutting unit Counterbalance normal setting is
approximately 600-650 psi @ high Idle and when oil is
warm.
4. Lift circuit relief pressure is approximately
2600-2800 psi when oil is warm.
5. Steering Circuit has a normal relief setting of
approximately 1200 psi @ high idle and warm oil.
6. Wing deck cutting unit Counterbalance normal
setting is approximately 350-400 psi @ high Idle and
when oil is warm.
Figure 39
1. Charge Pressure
1
Figure 40
1. Counterbalance/Lift Circuit
2. Steering Circuit
1
2
Figure 41
1. Counterbalance (Wing Decks)
1
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