Flushing the Hydraulic System
IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or the system is
contaminated (oil appears milky or black or con-
tains metal particles).
IMPORTANT: Flush hydraulic system when chang-
Ing from petroleum base hydraulic fluid, such as
Mobil 424, to biodegradable fluid, such as Mobil
EAL 224H. Operate machine under normal operat-
ing conditions for at least four (4) hours before
draining.
1. Park machine on a level surface. Lower cutting
units, stop engine, engage parking brake and remove
key from ignition switch.
1
2
Figure 68
2. Clean area around filter mounting area. Remove fil-
1. Hydraulic reservoir cap
ter and drain reservoir into a suitable container. Drain
2. Sight gauge
hydraulic system, Make sure lift cylinders, hoses, and
tube lines are drained while the system is warm. Discard
filter.
3. Inspect and clean reservoir (see Inspecting Reser-
voir Parts).
4. Make sure filter mounting surface is clean. Apply
hydraulic oil to gasket on the new filter. Screw filter on
until gasket contacts mounting plate, then tighten filter
half a turn.
Note: Use biodegradable fluid, such as Mobil EAL
1
224H, for this step if you are changing to this type of fluid.
Use only hydraulic fluids specified in Checking Hydrau-
lic System Fluid (see General section of this chapter).
Other fluids could cause system damage.
5. Fill hydraulic reservoir.
6. Disconnect electrical connector to the fuel stop so-
lenoid to prevent engine from starting.
7. Turn ignition key switch; engage starter for ten (10)
seconds to the prime pump. Repeat this step again.
8. Connect electrical connector to the fuel stop sole-
noid.
9. Start engine and let it idle at low speed for a mini-
mum of two (2) minutes.
10. Increase engine speed to high idle for minimum of
one (1) minute under no load.
Hydraulic
System
Figure 69
1. Hydraulic filter
11. Raise and lower cutting units several times.
12. Shut off engine and check for hydraulic oil leaks.
Check oil level in hydraulic reservoir and add correct oil
if necessary.
13. Operate the machine for two (2) hours under normal
operating conditions.
14. Check condition of hydraulic oil. If the flushing fluid
shows any signs of contamination, or if you are changing
to biodegradable fluid, repeat steps 1 through 14 again.
15. Assume normal operation and follow recom-
mended maintenance intervals.
Reelmaster 2300–D/2600–D Page 4 – 79 Hydraulic System
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