National Crane 600H, Руководство по обслуживанию

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ELECTRIC SYSTEM 600H
3-2
08-19-2022 Control # 092-13
MAINTENANCE
General
Electrical system maintenance includes troubleshooting and
replacement of damaged components. Observe standard
wiring practices when replacing components.
General Troubleshooting
Make voltage checks at terminations when components are
installed and operating. Make continuity checks when
components are isolated or removed. Trouble shoot per the
following guidelines:
1. Use reported symptoms to identify a problem or a
suspect component.
2. Use a multimeter to test for circuit continuity if you
suspect an open circuit or for voltage if you suspect a
power problem. Check the electrical schematic for the
most accurate wiring information.
3. Replace faulty components and wiring.
4. Test the repaired circuit and verify that the circuit works
properly.
Dielectric Grease
Dielectric grease was applied to the following connections at
the factory when the crane was assembled. When servicing
electrical connections, dielectric grease must be re-applied
to these connections.
• All Deutsch Connectors
• All Valve Solenoid connections on Hydraulic valves and
Transmissions
• All Harness Connections
• RCL Module Connections (except M12 and M8
connectors)
Excluded Connections
Do not apply dielectric grease to the following connections:
• All Connections Inside the Cab
• M12 and M8 Connectors
• Pin-type Contacts
Applying Dielectric Grease to an Electrical Connector
Use the following procedure to apply dielectric grease to an
electrical connection. Grease should be applied immediately
prior to securing the connector. Ensure that grease is applied
to all terminal sockets (Figure 3-1).
1. Check the connection for moisture before application of
the grease. If moisture is found, clean or replace the
connector as necessary.
2. Screw a tip or trigger assembly on to the can of dielectric
grease if necessary.
3. Apply the grease onto socket (female) contacts.
4. Use a clean towel to remove excess grease from the
surface of the connector, and wipe grease into the
terminal sockets (Figure 3-1).
5. Ensure grease is applied to each terminal socket. The
towel with excess grease can be used to fill empty
terminal sockets (Figure 3-1).
6. Ensure grease is applied to the entire surface of the
connector’s rubber seal (Figure 3-1).
NOTE: Do not allow grease to come in contact with any
painted surface, or any other components.
7. If clean up is necessary, contact cleaner or petroleum
distillates can be used.
8. Secure the connector when complete.
Connector Troubleshooting
The cause of an electrical problem may be a loose or
corroded connection in a connector. Check the connectors to
DANGER
When metal jewelry, rings, or watches come in contact
with live circuits, serious burns can result. Remove all
metal jewelry, rings, and watches before working on live
circuits.
!
Rubber
Seal
Terminal
Sockets
Example. For illustration purposes
only. Your connector may differ.
FIGURE 3-1
9746
REFERENCE ONLY