Manitowoc Grove YB5515-2, Руководство по обслуживанию и ремонту

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GROVE
Published 1-20-2017, Control# 483-02
1-11
CD5515-2/YB5515-2 SERVICE MANUAL INTRODUCTION
1
Table 1-1
4. Hydraulic hose assemblies operating in a temperature
climate zone “C” Table 1-1 are recommended to be
replaced after 8000 hours of service life.
5. Hydraulic hose assemblies operating in climate zones
“A” and “B” with high ambient temperatures, could see
hose service life reduced by 40 to 50%, therefore, it is
recommended to replace these hoses after 4000 to
5000 hours of service life.
6. Hydraulic hose assemblies operating in climate zones
“D” and “E” should expect a degradation of mechanical
properties such as elasticity, therefore, it is
recommended these hoses be inspected and addressed
accordingly.
Electrical System
Harnesses, Wires, and Connectors
Visually inspect all electrical harnesses, cables, and
connectors every month or 250 hours for the following:
• Damaged, cut, blistered, or cracked insulation.
• Exposed bare wires.
• Kinked or crushed wires and cables.
• Cracked or corroded connectors, battery terminals, and
ground connections.
If any the above conditions exist, evaluate, clean and replace
as necessary.
The climate in which the crane operates affects the service
life of the electrical components. The climate zones are
defined in Table 1-1. Recommended replacement of harness
and cables is as follows:
• Climate zone C after 10,000 hours of service.
• Climate zones A and B with high ambient temperatures
and duty cycles after 8000 hours of service.
• Climate zones D and E after 5,000 hours of service.
• Salt water conditions after 8,000 hours of service.
Fatigue of Welded Structures
Ex perience has shown that hi ghly stressed welded
structures when repeatedly subjected to varying stresses
caused by twisting, shock, bending, and intentional and/or
unintentional overloads, often become subject to weld
cracking which may be attributed to fatigue of the welded
joint. This condition is not uncommon in construction
equipment.
Equipment should be periodically inspected for evidence of
weld fatigue. The frequency of these inspections should
increase with the age of the equipment and the severity of
the application.The following are known high stress areas
applicable to Grove cranes, and a visual inspection of these
areas should be made part of an owner’s planned preventive
maintenance program:
• Telescopic Boom: wear pad retaining structures,
hydraulic cylinder attaching points, boom pivot shaft
retaining structures.
• Outrigger pads, beams, boxes and attachment
structures.
• Main frame: generally in the area of doubler plates and
crossmembers; at the junction of front and rear frame
members on truck cranes.
• Turntable bearing connection—where bearing is welded
to the crane superstructure or chassis.
• Counterweight support structures.
• Chassis axle and suspension mounting structures.
• Hydraulic cylinder end connections.
The above is provided only as a guide, and your inspection
plan should not be limited to the areas listed. A thorough
visual inspection of all weldments is good practice.
Anyone requiring more detailed inspection instructions and/
or repair procedures may request same by contacting your
local Manitowoc distributor.
Zone Classification
A Tropical Moist: All months average above 18°C. Latitude 15° - 25° North and South
B Dry or Arid: Deficient precipitation most of the year. Latitude 20° - 35° North and South
C Moist Mid-Latitude: Temperature with mild winters. Latitude 30° - 50° North & South
D Moist Mid-latitude: Cold winters. Latitude 50° - 70° North & South
E Polar: Extremely cold winters and summers. Latitude 60° - 75° North & South
Reference Only