Check Hydraulic Lines And Hoses; Flush Hydraulic System - Toro Reelmaster 5500-D Service Manual

Check Hydraulic Lines and Hoses

Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, not hands, to
search for leaks. Hydraulic fluid escaping under
pressure can have sufficient force to penetrate
the skin and cause serious injury. If fluid is in-
jected into the skin, it must be surgically re-
moved within a few hours by a doctor familiar
with this type of injury. Gangrene may result from
such an injury.

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 Mobil EAU 224H. Operate
machine under normal operating conditions for at
least four (4) hours before draining.
1. Park machine on a level surface. Lower cutting units,
stop engine, and engage parking. Remove key from the
ignition switch.
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 disconnected for
draining.
2. Drain hydraulic reservoir (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 Change Hydraulic
Oil Filter).
5. Inspect and clean hydraulic reservoir (see Hydraulic
Reservoir Inspection).
Hydraulic System (Rev. C)
WARNING
CAUTION
IMPORTANT: Check 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.
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 to biodegradable
fluid, use Mobil EAU 224H for this step. Other fluids may
cause system damage.
7. Fill hydraulic reservoir with new hydraulic fluid (see
Change Hydraulic Fluid).
8. Disconnect electrical connector from run (TERM) so-
lenoid.
9. Turn ignition key switch; engage starter for 10 se-
conds to the prime pump. Repeat this step again.
10.Connect electrical connector to run (ETR) solenoid.
11. Start engine and let it idle at low speed (1150 RPM)
for a minimum of 2 minutes. Increase engine speed to
high idle (3200 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 reservoir and add correct
amount of oil if necessary.
14.Operate machine for 2 hours under normal operating
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 you are changing to
biodegradable 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.
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