Manitowoc Grove GRT9165, Service Manual

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ELECTRICAL SYSTEM GRT9165 SERVICE MANUAL
3-10
Published 10-01-2020 Control # 699-00
Visual Inspection and Replacement of
Electrical Harnesses and Cables
Visually inspect all electrical harness and cable assemblies
every month or at 250 hours of service life for the following:
• Damaged, cut or deteriorated harness loom covering.
• Damaged, cut or abraded individual wires or cable
insulation.
• Exposed bare copper conductors.
• Kinked, crushed, flattened harnesses or cables.
• Blistered, soft, degraded wires and cables.
• Cracked, damaged, or badly corroded battery terminal
connections.
• Inspect all machine ground connections for damaged
terminals or excessive corrosion.
• Other signs of significant deterioration.
If any of these conditions exist, evaluate the harness
assemblies for repair or replacement. For replacement of
harness assemblies, refer to your Manitowoc Crane Care
Parts Manual.
At the same service interval, visually inspect all Controller
Area Network (CAN) nodes and electrical junction boxes for
the following:
• Damaged or loose connectors.
• Damaged or missing electrical clamps or tie straps.
• Excessive corrosion or dirt on the junction box
assemblies.
• Loose junction box mounting hardware.
If any of these conditions exist, address them appropriately.
Ambient temperature, humidity and other factors affect the
life of electrical harness and cable assemblies. Use the
following information for the inspection and replacement of
these assemblies:
• Cranes operating in climate zone “C” should have the
harness and cable assemblies replaced after 10,000
hours of service life.
• Cranes operating in climate zones “A” or “B” with high
ambient temperatures could see electrical service life
reduced by 25% to 40%. It is recommended to replace
these assemblies after 8000 hours of service life.
• Cranes operating in climate zones “D” and “E”, cold
climates, should expect a degradation of mechanical
p r o p e r t i e s , l o n g t e r m e x p o s u r e t o t h e s e c o l d
temperatures will negatively impact service life.
Therefore, it is recommended these electrical harnesses
and cable assemblies be inspected regularly as service
life may be less than 10,000 hours.
• Cranes operating in salt water climates could see a
significant reduction in service life. Therefore it is
recommended for these electrical harnesses and cable
assemblies to be inspected regularly as service life may
be less than 8,000 hours.
Table 3-1
General Troubleshooting
NOTE: Make voltage checks at terminations when
components are installed and operating. Make
continuity checks (with batteries disconnected)
when components are isolated or removed.
Troubleshoot per the following guidelines:
1. Use reported symptoms to identify a problem or a
suspect component.
2. Test suspect component per instructions in this section.
Instructions identify fuses and components, and guide
you from the easiest and most likely problems to the
hardest and least likely problems.
3. Using a multimeter, test circuit for continuity if you
suspect a broken circuit, or for voltage if you suspect a
power problem. Check electrical schematic and wiring
diagram for most accurate wiring information.
CAUTION
Ensure battery cables are disconnected from batteries
before loosening any electrical connections.
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