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7
MAINTENANCE
7.6
HYDRAULIC HOSES _______________________________________________________
WARNING
!
To prevent serious injury from hot, high pressure oil,
never use your hands to check for oil leaks. Always 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.
Do not attempt to replace hydraulic hoses with aerator
head in raised position. Hoses are under extreme
pressure. Releasing pressure improperly could cause
aerator head to drop suddenly.
1.
Always disengage all drives, lower aerator head to
ground, stop engine, and disconnect spark plug wire
before inspecting or disconnecting hydraulic lines or
hoses.
2.
With engine stopped, move Tine Lever to Raise
position for 10 seconds and Lower position for 10
seconds to release system pressure.
3.
Check visible hoses and tubes daily. Look for wet
hoses or oil spots. Replace worn or damaged hoses
and tubes before operating the
7.7
HYDRAULIC OIL __________________________________________________________
Refer to Section 9.2 for specific maintenance intervals.
Drain and replace the hydraulic oil after a major component
failure, 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 between 60° to 90°F (16°
- 32°C). Do not check oil level when oil is hot.
b.
Check oil with aerator head in raised position.
c.
The main oil tank should always be full.
24
aerator .
4.
Replacement tubes and hoses must be routed in the
same path as the existing tubes and hoses. Do not
move clamps, brackets, and ties to a new location.
5.
Thoroughly inspect all tubes, hoses, and connections
every 250 hours.
IMPORTANT:
The
permanently
damaged
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, and 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 excessive 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 premature hose failure.
2.
Drain and replace the hydraulic oil every 250 hours or
after a major component failure, 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 dipstick/filler cap.
4.
After oil has drained install drain plug and fill with
Jacobsen GreensCare 68.
5.
Purge air from system.
a.
Operate lift / lower function for several 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 tank to the Full level.
hydraulic
system
can
if
the
oil
becomes
be
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