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Manitowoc
Published 05-16-17, Control # 233-03
2-1
999 SERVICE/MAINTENANCE MANUAL
HYDRAULIC SYSTEM
2
SECTION 2
HYDRAULIC SYSTEM
This section contains hydraulic system maintenance,
adjustment, calibration and test procedures for the hydraulic
system and related components on the Model 999.
Experienced technicians, trained in the operation of this
crane and its hydraulic system, shall perform the procedures
described this section. The technicians shall read,
understand, and comply with the instructions in this section
and to the display screen instructions in Section 3 of the 999
Operator Manual.
Contact your Manitowoc dealer for an explanation of any
procedure not fully understood.
The adjustment, calibration, and test procedures described
in this section were made to the crane before it was shipped
from the factory. These procedures must be performed by
field personnel only when parts are replaced or when
instructed by a Manitowoc dealer.
NOTE:
Applicable hydraulic schematics are included at the
end of this section.
INSPECTING HYDRAULIC HOSES
Every Month or 200 Hours
1.
Visually inspect all hydraulic hose assemblies every
month or at 200 hours of service life for the following:
-
Leaks at hose fittings or in hose
-
Damaged, cut, or abraded cover
-
Exposed reinforcement
-
Kinked, crushed, flattened, or twisted hose
-
Hard, stiff, heat cracked, or charred hose
-
Blistered, soft, degraded, or loose cover
-
Cracked, damaged, or badly corroded fittings
-
Fitting slippage on hose
-
Other signs of significant deterioration
If any of these conditions exist, evaluate the hose
assemblies for correction or replacement.
2.
At the same service interval, visually inspect all other
hydraulic components and valves for the following:
-
Leaking ports
-
Leaking valve sections or manifolds and valves
installed into cylinders or onto motors
-
Damaged or missing hose clamps, guards, or
shields
-
Excessive dirt and debris around hose assemblies
If any of these conditions exist, address them
appropriately.
Degradation Due to Extreme Environment
Table 2-1. Climate Zone Classification
:
Salt Environment
Hydraulic hose assemblies operating in salt water climates
could see a significant reduction in service life. Regularly
inspect hydraulic hose assemblies per Step 1.
Zone A and B
After 4,000 to 5,000 hours of service life, replace hydraulic
hose assemblies operating in these climate zones with high
ambient temperatures and high duty circuits. These hoses
could experience a service life reduced 40% to 50%.
High duty circuits can include, but are not limited to hoist(s),
boom lift, swing, travel, pump suction and discharge to
directional valves, and directional valve return to reservoir.
Zone C
After 8,000 hours of service life, replace hydraulic hose
assemblies operating in this climate zone.
CAUTION
Do not alter hydraulic system specifications given in this
section without approval of your Manitowoc dealer.
Damage to hydraulic components and improper operation
of crane can occur if specifications are altered.
CAUTION
Burn Hazard!
Oil in hydraulic tank may be under pressure and
extremely hot. Ensure that the hydraulic hose is
depressurized before loosening any connections.
Zone Description
A
Tropical Moist: All months average above 65°F (18°C).
Latitude: 15° - 25° N & S
B
Dry or Arid: Deficient precipitation most of the year.
Latitude: 20° - 35° N & S
C
Moist Mid-Latitude: Temperate with mild winters.
Latitude: 30° - 50° N & S
D
Moist Mid-Latitude: Cold winters.
Latitude 50° - 70° N & S
E
Polar: Extremely cold winters and summers.
Latitude: 60° - 75° N & S
Содержание 999
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Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
Страница 174: ...R e f e r e n c e O n l y BOOM 999 SERVICE MAINTENANCE MANUAL 4 20 Published 05 16 17 Control 233 03 ...
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