Section V. GENERAL MAINTENANCE INSTRUCTIONS
This section describes general procedures that apply to all parts of the Common Bridge Transporter
(CBT) System. To avoid repetition, these procedures are not described in specific maintenance
Work Required. Remove only those parts needing repair or replacement. Do not disassemble a
component any further than needed.
Preparation. Before removing any parts of the electrical or hydraulic systems, make sure the system is
not energized or pressurized. Disconnect the batteries before doing any work to the electrical system.
Make sure the parking brake is applied, wheels are blocked, and all controls are in the OFF position
before starting any removal procedure.
Removal. Make sure there is enough clearance to remove a part. Disassemble adjacent parts as needed
to provide working clearance.
Lifting. Always use a chain hoist, jack, or other aid when lifting heavy parts. Make sure the load limit of
lifting devices is not exceeded by the weight being lifted. Position and rig lifting devices before
disconnecting any part for removal.
Identification. Tag or mark all similar parts, such as electrical leads, before disconnecting and removing
the part. This will make proper assembly easier. Be sure to identify mating ends of electric, hydraulic,
and air lines as they are disconnected.
Position of Valves. Before removing valve handles, mark or diagram their positions when opened and
closed. This will help during assembly.
Electrical Wires and Connectors. Electrical wires and connectors are identified on the electrical
schematic. Wherever possible, these wire and connector numbers are also provided in the
troubleshooting and maintenance tasks.
Cleanliness. The work area must
as possible. This will prevent contamination
internal parts. This is especially true for valves, cylinders, and other hydraulic or air system parts.
Expendable Parts. All gaskets, preformed packings, and seals removed during repair shall be discarded
and replaced with new parts. These items are usually damaged during removal. All lockwires,
lockwashers, locknuts, cotter pins, and like items must be replaced at the time of assembly.
Seal Removal. When removing gaskets, preformed packings, or seals do not use any metal tool that will
scratch the surfaces next to those items.
Disassembly. Before disassembly of any item, study the illustrations carefully. Note the relationship of
internal parts. Knowing the details of a component will speed up disassembly and assembly and will help