Prevention Of Contamination - NPK M20S Instruction Manual

HYDRAULIC INSTALLATION

PREVENTION OF CONTAMINATION

1. Neglect of the hydraulic oil will cause many problems in all of the hydraulic
components, including the attachment.
contamination of the oil and to change the oil if contamination is found. Routine oil
sampling is recommended once per month.
 When the hydraulic oil shows low viscosity and bubbles, this indicates that the
oil is deteriorated. If the oil is dark brown and gives off an offensive odor, it is
severely deteriorated. Change the oil immediately!
 When the oil is clouded, or the oil filter becomes clogged, it indicates that the oil
is contaminated. Change the oil immediately!
 To change the contaminated hydraulic oil, drain the hydraulic system as
completely as possible. Try to minimize the amount of old oil that will be mixed
with the new oil.
NOTE: It is suggested to change the oil in the system with all of the
cylinders retracted.
NOTE: If a catastrophic failure has occurred and the system is found to have metal
mixed with the hydraulic oil, a complete disassembly and clean out must be done to
ALL hydraulic components and attachments.
flushed.
2. Do not allow any contaminants to mix with the hydraulic oil. Take special care in
preventing contamination from entering the hydraulic system through the hose or
tube connection when installing or removing the attachment. Always have caps and
plugs ready.
3. Low oil level will cause heat buildup, resulting in deterioration of the hydraulic oil.
Also, it may cause pump cavitation due to air mixing with the oil, leading to damage
to the attachment or the carrier components. Keep the oil at the proper level at all
times.
4. Do not use the hammer at an operating temperature higher than 180°F (80°C). The
proper operating oil temperature range is between 120°F (50°C) and 180°F (80°C).
Since contaminated cooler fins cause reduced efficiency of the cooler, keep them
clean at all times. The use of a heat gun is the best way to evaluate if the cooler is
working properly.
5. Water in the hydraulic oil will lead to damage of the attachment and the carrier.
Drain off water and foreign matter from the hydraulic tank at specified intervals.
When out of service, the attachment should be stored indoors.
Care should be taken to check for
ALL of the hydraulic lines must be
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