Flush Hydraulic System - Toro Reelmaster 7000-D Service Manual

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. Operate machine under normal
operating conditions for at least four (4) hours be-
fore draining.
IMPORTANT: If a component failure occurred in the
traction circuit, refer to Traction Circuit (Closed
Loop) Component Failure in this chapter for infor-
mation regarding the importance of removing con-
tamination from the traction circuit.
1. Park machine on a level surface. Lower cutting units,
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. Controls must be operated with the
ignition switch in OFF. Remove key from the igni-
tion switch.
IMPORTANT: Make sure to clean around any hy-
draulic connections that will be disassembled.
2. Drain hydraulic reservoir into a suitable container.
3. Drain hydraulic system. Drain all hoses, tubes and
components while the system is warm.
4. Change and replace both hydraulic oil filters.
Reelmaster 7000- D
5. Inspect and clean hydraulic reservoir (see Hydraulic
Reservoir Inspection in the Service and Repair section).
6. Connect all hydraulic hoses, lines and components
that were disconnected while draining system.
NOTE: Use only hydraulic fluids specified in the Trac-
tion Unit Operator's Manual. Other fluids may cause
system damage.
7. Fill hydraulic reservoir with new hydraulic fluid.
8. Prime hydraulic pumps (see Priming Hydraulic
Pumps in this chapter).
9. Start engine and let it idle at low speed for a minimum
of 2 minutes. Increase engine speed to high speed for
a minimum of 1 minute under no load.
10.Raise and lower cutting units several times. Turn
steering wheel fully left and right several times.
11. Move reel enable/disable switch to ENABLE to en-
gage cutting units and let them run for several minutes.
Move reel enable/disable switch to DISABLE.
12.Shut off engine and check for hydraulic fluid leaks.
Check fluid level in hydraulic tank and add correct
amount of hydraulic fluid if necessary.
13.Operate the machine for 2 hours under normal oper-
ating conditions.
14.Check condition of hydraulic fluid. If the new fluid
shows any signs of contamination, repeat steps 1
through 14 again until fluid is clean. If changing to biode-
gradable fluid, repeat steps 1 through 14 again at least
once and until the fluid is clean.
15.Assume normal operation and follow recommended
maintenance intervals.
Page 5 - 89 Hydraulic System