Muffler And Exhaust; Hydraulic Hoses; Hydraulic Oil - Jacobsen AR522 Handbuch

7 MAINTENANCE

7.10 MUFFLER AND EXHAUST __________________________________________________

!
WARNING
Exhaust fumes contain carbon monoxide that is toxic
and can be fatal when inhaled.
NEVER operate an engine without proper ventilation.

7.11 HYDRAULIC HOSES _______________________________________________________

!
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.
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.

7.12 HYDRAULIC OIL __________________________________________________________

Refer to Section 6.2 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 hydraulic filter when oil filter light stays on
or 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 tank.
36
To protect from carbon monoxide poisoning, inspect the
complete exhaust system regularly and always replace a
defective muffler.
If you notice a change in the color or sound of the
exhaust, stop the engine immediately. Identify the
problem and have the system repaired.
Torque all exhaust manifold hardware evenly. Tighten or
replace exhaust clamps.
4. 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 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.
3. After oil has drained, install drain plug and fill with
hydraulic oil.
4. Purge air from system.
a. Operate all mower functions for about 5 minutes
to purge air out of the system and stabilize the oil
level. During this time, the oil level alarm may
sound.
b. Once the level has stabilized and the air is
purged, fill the tank to the full mark on dipstick.
Start engine and check that oil alarm remains off.
hydraulic system can
if the oil becomes
be