Section V. GENERAL REPAIR AND CLEANING METHODS
This section describes general maintenance instructions that apply to all parts of this manual. To avoid repetition,
these procedures will not be described in specific maintenance sections.
GENERAL REMOVAL INSTRUCTIONS
1. Work Required. Remove only those parts needing repair or replacement. Do not disassemble a component any
further than needed.
2. Preparation. Before removing any part of the electrical, hydraulic, or air systems, make certain system is not
energized or pressurized. Disconnect battery cables. Relieve all pressure from air system. Make sure brakes are
locked and that all controls are in OFF position before starting any removal procedure.
3. Removal. Make sure there is enough clearance to remove part. Disassemble adjacent parts as needed to provide
4. Lifting. Always use chain hoist, jack, or other aid when lifting heavy parts. Make certain load limit of lifting device
exceeds weight being lifted. Position and rig lifting device before disconnecting part for removal.
5. Identification. Tag or mark all similar parts, such as electrical leads, before disconnecting and removing such parts.
This will make proper assembly easier. Be sure to identify mating ends of electric lines, hydraulic lines, and air tubes
as they are disconnected.
6. Position of Valves. Before removing valve handles, mark or diagram their positions when open and closed. This will
help during assembly.
GENERAL DISASSEMBLY INSTRUCTIONS
Cleanliness. Work area must be kept as clean as possible. This will prevent injury or contamination of internal parts.
This is especially true for valves, cylinders, and other hydraulic or air system parts.
Expendable Parts. As indicated in this manual, all gaskets, packings, and seals removed during repair must be
discarded and replaced with new parts. These items are usually damaged during removal. In the same way, all
lockwire, cotter pins, and like items must be replaced at time of assembly.
Removing Seals. When removing gaskets, packings, or seals, do not use any metal tool that will scratch the surfaces
next to these Items.
Disassembly. Before disassembly of any item, study the Illustration carefully. Note relationship of internal parts.
Knowing details of a component will speed up disassembly and assembly and will help avoid mistakes.
Parts Protection. To prevent moisture and dirt from entering open housings, lines, and other openings, apply
protective caps and plugs as soon as possible after disassembly. Wrap all removed parts in clean paper or dip parts
In preservative oil.