7 MAINTENANCE
en-42
7.12 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, or 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.
7.13 HYDRAULIC OIL __________________________________________________________
Refer to
Section 6.3
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° to 32°C). Do not check oil level when oil is
hot.
b.
The main oil tank level should be 2 inches below
filler neck. Do not overfill.
2.
Drain and replace the hydraulic oil yearly 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. Check and clean
the breather cap, replace as necessary.
4.
After oil has drained install drain plug and fill with
Jacobsen Hydraulic oil.
5.
Purge air from system.
6.
Operate all mower functions for about 5 minutes to
purge air out of the system and stabilize the oil
level. Fill tank to full 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.
NOTICE
Care must be used at all times to avoid any
contamination of the hydraulic system. Follow
recommended maintenance practices and adhere to
scheduled intervals for hydraulic oil and filter changes.
Introduction of any type of contamination may result in
operating issues by causing valves to stick or leak
internally.
!
Summary of Contents for R311T-T4I
Page 63: ...NOTES 11 en 63 11 NOTES ...
Page 125: ...REMARQUES 12 fr 63 12 REMARQUES ...
