Manitowoc MLC650 Service Maintenance Manual

Reference Only
Manitowoc Published 09-09-16, Control # 229-09 2-21
MLC650 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
2
2
• 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.
At the same service interval, visually inspect all other
hydraulic components and valves for:
• 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.
Periodic Replacement
Hydraulic hose assemblies operating in zone C (Table 2-2)
should be replaced after 8,000 hours of service life.
Hydraulic hose assemblies operating in zones A and B with
high ambient temperatures and high duty circuits could see
hose service life reduced by 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. Replace hoses
operating in zones A and B after 4,000 to 5,000 hours of
service life.
Hydraulic hose assemblies operating in zones D and E,
should expect a degrade of mechanical properties. Long-
term exposure to these cold temperatures will negatively
impact service life. Cold temperatures shorten hose life.
Therefore, frequent inspection is required.
Table 2-2. Climate Zone Classifications
Zone Description
A
Tropical Moist: All months average above 18°C
(65°F). Latitude: 15° to 25° N & S
B
Dry or Arid: Deficient precipitation most of the
year. Latitude: 20° to 35° N & S
C
Moist Mid-Latitude: Temperate with mild winters.
Latitude: 30° to 50° N & S
D
Moist Mid-Latitude: Cold winters.
Latitude 50° to 70° N & S
E
Polar: Extremely cold winters and summers.
Latitude: 60° to 75° N & S

Manitowoc MLC650 Specifications

General

Brand	Manitowoc
Model	MLC650
Category	Construction Equipment
Language	English