Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
2-3
999 SERVICE/MAINTENANCE MANUAL
HYDRAULIC SYSTEM
2
•
Replace tubes that are cracked, kinked, or bent.
•
Replace hoses that are cracked, split, or abraded.
•
Listen to pumps and motors for unusual noises; a
high pitched whine or scream can indicate that air is
being drawn in.
An air leak can be pinpointed by flooding inlet fitting,
hose, or tube with oil. If there is an air leak, the oil
will cause a noticeable reduction in noise. Correct
cause for any air leak, or pump/motor will be ruined.
NOTE:
A high-pitched whine or scream from the pump can
also indicate cavitation (pump being starved of oil).
This condition is caused by the following problems:
•
Plugged suction filter
•
Collapsed or plugged suction line
•
Wrong oil (viscosity too high)
6.
Look for signs of overheating: heat peeled parts, burned
and scorched oil odor, and darkening and thickening of
oil. Maximum temperature of oil in tank must not exceed
180°F (82°C).
7.
Have hydraulic oil analyzed at regular intervals to
determine condition of oil and extent of system
contamination.
By having the oil analyzed on a regular basis, an oil
change interval meeting your operating conditions can
be established.
NOTE:
Contact your oil supplier for the availability of oil
analysis services and the steps that should be
taken to obtain these services.
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...