Toro Groundsmaster 4000 Operator's Manual page 75

Important:
Use of any other filter may void the
warranty on some components.
1. Position the machine on a level surface, lower
the cutting units, engage the parking brakes,
shut off the engine, and remove the key from
the ignition.
2. Replace the hydraulic filters
Figure 118
3. Start the engine and let it run for about 2 minutes
to purge air from the system and shut off the
engine and check for leaks.
Checking the Hydraulic Lines and
Hoses
Service Interval: Every 2 years
Inspect the 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 the machine.
(Figure 118).
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75
Adjusting the Counterbalance
Pressure
The counterbalance test port is used to test the
pressure in the counterbalance circuit
The recommended counterbalance pressure is
2241 kPa (325 psi). To adjust the counterbalance
pressure, loosen the locknut, rotate the adjusting
screw (Figure 119) clockwise to increase the pressure
or counterclockwise to decrease the pressure, and
tighten the locknut. The engine must be running and
the deck lowered and in the float position to check
the pressure.
Note:
The caster wheels of all 3 cutting units
should remain on the ground when adjusting the
counterbalance and with counterbalance applied.
Figure 119
1. Counterbalance-adjusting
screw
(Figure 119).
g020446
2. Counterbalance-test port