MAINTENANCE 4
19
4.11 HYDRAULIC HOSES _______________________________________________________
1.
Always lower implements to ground, disengage all
drives, engage parking brake, stop engine and remove
key before inspecting or disconnecting hydraulic lines or
hoses.
2.
Check visible hoses and tubes daily. Look for wet
hoses or oil spots. Replace worn or damaged hoses
and tubes before operating the machine.
3.
The replacement tube or hoses must be routed in the
same path as the existing hose, do not move clamps,
brackets and ties to a new location.
4.
Thoroughly inspect all tubes, hoses and connections
every 250 hours.
IMPORTANT: The hydraulic system can be
permanently damaged if the oil becomes
contaminated. Before disconnecting any hydraulic
component, clean the area around the fittings and the
hose ends to keep impurities out of the system.
a.
Before disconnecting any hydraulic component, tag
or mark the location of each hose then clean the
area around the fittings.
b.
As you disconnect the component, be prepared to
assemble plugs or caps to the hose ends and open
ports. This will keep impurities out of the hydraulic
system and also prevent oil spills.
c.
Make sure “O” rings are clean and hose fittings are
properly seated before tightening.
d.
Keep the hose from twisting. Twisted hoses can
cause couplers to loosen as the hose flexes during
operation resulting in oil leaks.
e.
Kinked or twisted hoses can restrict the oil flow
causing the system to malfunction and the oil to
overheat and also lead to hose failure.
4.12 HYDRAULIC OIL___________________________________________________________
Refer to Section 6.3 for specific maintenance intervals.
Drain and replace the hydraulic oil after a major component
failure, or if you notice the presence of water or foam in the
oil, or a rancid odor (indicating excessive heat).
Always replace the hydraulic filter when changing oil.
To change hydraulic oil:
1.
Clean the area around the oil cap to prevent impurities
from entering and contaminating the system.
a.
Oil temperature should be at 60° to 90°F (16° -
32°C). Do not check oil level when oil is hot.
b.
The main oil tank should always be full. A Low oil
level in the main tank will drain oil from the
expansion tank.
c.
The oil level in the expansion tank should always
be at or above the “COLD” level mark. Add oil to
the expansion tank, not the main tank.
2.
Drain and replace the hydraulic oil every 200 hours or
after a major component failure, or if you notice the
presence of water, foam, or a rancid odor.
3.
Remove drain plug from bottom of main tank and
loosen or remove breather cap on top of expansion
tank. Check and clean the breather cap, replace as
necessary.
4.
After oil has drained install drain plug and fill with
Textron Turf Care And Specialty Products Hydraulic oil.
5.
Purge air from system.
a.
Operate all tractor functions for about 5 minutes to
purge air out of the system and stabilize the oil
level.
b.
Once the level has stabilized and the air is purged,
fill the expansion tank to the “COLD” level.
WARNING
To prevent serious injury from hot, high pressure oil,
never use your hands to check for oil leaks, use paper
or cardboard.
Hydraulic fluid escaping under pressure can have
sufficient force to penetrate skin. If fluid is injected into
the skin it must be surgically removed within a few hours
by a doctor familiar with this form of injury or gangrene
may result.
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