Accumulators; Safety Instructions - New Holland LW50 Service Manual

TECHNICAL HANDBOOK LW 50
Dismantling components
Never dismantle while the machine is at
operating temperature.
Oils, greases, brake fluid or coolants may
have a high temperature and result in
burning or scalding.
Leave time for the machine to cool down.
Before starting work, depressurize piping
and hoses, cylinders, radiator, hydraulic
tank, air-brake reservoir and other sys-
tems or units.
Replace defective components in good
time to prevent major damage.
Clean the defective component carefully
before dismantling it.
Mark the dismantled parts in the correct
sequence to facilitate assembly.
When dismantling the component, close
off exposed hose and piping connections,
exposed drill holes and housing carefully
to prevent any dust from penetrating.
After the repair work
To prevent corrosion, coat all bright metal
machine parts with a grease film.
On completing the work, reassemble all
protective devices, covers, and sound-
and vibration-insulation material.
Never start up the driving motor while
work is being done on the machine.
Check the repaired components and all
machine functions with a trial run.
Never release the machine for recommis-
sioning until it is fully functioning.
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ACCUMULATORS

Safety instructions

Accumulators are installed in the hydraulic
system. These accumulators contain nitro-
gen under high initial pressure.
Even when the hydraulic pressure in the
system is reduced, the nitrogen remains
in the accumulator.
The accumulators are completely safe in
operation. If incorrectly handled, however,
there is a risk of explosion.
So:
- Never handle accumulator mechanical-
ly, never weld or solder it.
- Testing and servicing work must be
carried out by experts only.
- Prior to any testing and servicing work,
depressurize the hydraulic part of the
system.
- To dismantle the accumulator, always
wear goggles and working gloves.
- Fill accumulator with nitrogen only,
never with compressed air or oxygen.
- Report any defects or damage to the
machine owner without delay.
- Prior to recommissioning, an inspec-
tion by a specialist or expert is essen-
tial if the accumulator was damaged or
if the admissible operating temperature
or operating pressure was exceeded.
Never remove or paint over warning and
information plates, rating plates or type
identification markings. Replace illegible
or damaged plates immediately.
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