9 MAINTENANCE
35
9.12 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.
9.13 HYDRAULIC OIL AND FILTER _______________________________________________
Refer to
Section 8.3
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.
2.
Remove drain plug from bottom of main tank.
3.
After oil has drained install drain plug and fill with
Jacobsen Hydraulic oil.
4.
Purge air from system.
a.
To prevent reels from overheating, disconnect
motors from reels.
b.
Operate all mower functions for about 5 minutes
to purge air out of the system and stabilize the oil
level.
c.
Once the level has stabilized and the air is
purged, fill tank to Full mark on gauge.
The hydraulic system is protected by one 10 micron filter
(A)
. The filter is located under the operator platform near
the hydraulic oil tank.
To replace hydraulic oil filter:
1.
Remove the old filter.
2.
Fill new filter with oil then install new filter. Hand
tighten only.
3.
Operate engine at idle speed with hydraulic system
in Neutral for five minutes.
4.
Check hydraulic oil level and fill to Full mark on
gauge.
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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