Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 75
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
thereis a severecomponent failure orthe systemis
contaminated. Contaminated oil may appear milky
or black or may contain metal particles.
IMPORTANT: If a component failure occurred in the
closed loop traction circuit (e.g. piston pump or
wheel motor), filtering the traction circuit is recom-
mended.SeeFilteringClosed--LoopTractionCircuit
in this section.
1. Park machineona levelsurface.Lower cuttingdeck
totheground,stop engineandapply parkingbrake.Re-
move key from the ignition switch.
WARNING
Before disconnecting or performing any work
on the hydraulic system, all pressure in the sys-
tem must be relieved. See Relieving Hydraulic
SystemPressureintheGeneralInformationsec-
tion in this chapter.
IMPORTANT: Make sure to clean around any hy-
draulic connections that will be disconnected for
draining.
2. Drain hydraulic reservoir. Remove suction screen
fromreservoirandcleanthoroughly.Considerremoving
and cleaning reservoir if necessary.
3. Drain hydraulic system. Drain all hoses, tubes and
components while the system is warm.
4. Change and replace both hydraulic oil filters.
5. Inspect andclean hydraulic reservoir(seeHydraulic
Reservoir Inspection in this section).
6. Connect all hydraulic hoses, lines and components
that were disconnected while draining system.
NOTE: UseonlyhydraulicfluidsspecifiedintheOpera-
tor’s Manual. Other fluids may cause system damage.
7. Fill hydraulic reservoir with new hydraulic fluid.
8. Disconnect electrical connector from engine run so-
lenoid.
9. Turn ignition key switch and engage starter for ten
(10)secondstoprimehydraulicpumps.Waitfifteen(15)
seconds to allow the starter motor to cool and then re-
peat cranking procedure again.
10.Connectelectrical connectortoenginerunsolenoid.
11.Start engine and let it idle at low speed (1450 RPM)
for a minimum of two (2) minutes. Increase engine
speed to high idle (2870 RPM) for minimum of one (1)
minute under no load.
12.Raise and lower cutting deck several times. Turn
steering wheel fully left and right several times.
13.Shut off engine and check for hydraulic oil leaks.
Check oil level in hydraulic reservoir and add correct
amount of oil if necessary.
14.Operatemachinefor two(2) hours undernormalop-
erating conditions.
15.Check condition of hydraulic oil. If the new fluid
shows any signs of contamination, repeat steps 1
through 14 again until oil is clean.
16.Assume normal operation and follow recommended
maintenance intervals.
Hydraulic
System
To Next Page
Loading...
Need help?
General
