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Groundsmaster 4100--DHydraulic System Page 4 -- 62
Flush Hydraulic System
IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or the system is
contaminated (oil appears milky, black or contains
metal particles).
1. Park machine on a level surface. Lower cutting deck
to the ground, stop engine and engage parking brake.
Remove key from the ignition switch.
CAUTION
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
IMPORTANT: Make sure to clean around any hy-
draulic connections that will be disconnected for
draining.
2. Drain hydraulic reservoir.
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 and clean hydraulic reservoir (see Hydraulic
Reservoir Inspection in this section).
6. Connect all hydraulic hoses, tubes and components
that were disconnected while draining system.
NOTE: Useonly hydraulicfluids specifiedin the Opera-
tor’s Manual. Other fluids may cause system damage.
7. Fill hydraulic reservoir with new hydraulic fluid.
8. Disconnect wire harness connector from engine run
solenoid.
9. Turn ignition key switch and engage starter for ten
(10) seconds to prime hydraulic pumps. Repeat this
step again.
10.Connect wire harness connector to engine run sole-
noid.
11.Start engine and let it run at low idle (1450 RPM) for
a minimum of 2 minutes. Increase engine speed to high
idle (2870 RPM) for a minimum o f 1 minute under no
load.
12.Raise and lower cutting deck s everal 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.Operate machine for 2hoursunder normal operating
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.