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Reelmaster 3100−DHydraulic System (Rev. C)
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).
IMPORTANT: Flush hydraulic system when chang-
Ing from petroleum base hydraulic fluid to a biode-
gradable fluid such as Toro Biodegradable
Hydraulic Fluid. Operate machine under normal op-
erating conditions for at least four (4) hours before
draining.
IMPORTANT: If a component failure occurred in the
traction circuit, refer to Traction Circuit (Closed
Loop) Component Failure in the General Informa-
tion section for information regarding the impor-
tance of removing contamination from the traction
circuit.
1. Park machine on a level surface. Lower cutting units,
stop engine, and engage parking. Remove key from the
ignition switch.
WARNING
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
IMPORTANT: Make sure to clean around any hy-
draulic connections that will be disconnected for
draining.
2. Drain hydraulic tank (see Change Hydraulic Fluid).
3. Drain hydraulic system. Drain all hoses, tubes, and
components while the system is warm.
4. Change and replace oil filter (see Replace Hydraulic
Oil Filter).
5. Inspect and clean hydraulic oil tank (see Hydraulic
Tank Inspection).
6. Reconnect all hydraulic hoses, lines, and compo-
nents that were disconnected while draining system.
NOTE: Use only hydraulic fluids specified in Check Hy-
draulic System Fluid. If changing to biodegradable fluid,
use Toro Biodegradable Hydraulic Fluid for this step.
Other fluids may cause system damage.
7. Fill hydraulic tank with new hydraulic fluid (see
Change Hydraulic Fluid).
8. Disconnect electrical connector from fuel stop sole-
noid.
9. Turn ignition key switch; engage starter for 10 se-
conds to the prime hydrostat. Repeat this step again.
10.Connect electrical connector to fuel stop solenoid.
11.Start engine and let it idle at low speed (1750 +
50
RPM) for a minimum of 2 minutes. Increase engine
speed to high idle (2650 +
50 RPM) for minimum of 1
minute under no load.
12.Raise and lower cutting units 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 tank and add correct amount
of oil if necessary.
14.Operate the machine for 2 hours under normal oper-
ating conditions.
15.Check condition of hydraulic oil. If the new fluid
shows any signs of contamination, repeat steps 1
through 15 again until oil is clean. If changing to biode-
gradable fluid, repeat steps 1 through 15 again at least
once and until the oil is clean.
16.Assume normal operation and follow recommended
maintenance intervals.