DIRECT SUPPORT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE PROCEDURES.
This paragraph describes general procedures that apply to all maintenance tasks detailed in this manual. To avoid
repetition, these general procedures will not be repeated elsewhere in the manual.
General Removal and Disassembly Instructions.
Before removing any item, refer to the troubleshooting table. This ensures that faults are isolated to a
Work areas must be kept clean. This avoids contamination of internal parts. This is especially true for
areas where control valves, cylinders, or other hydraulic or air system parts are disassembled.
De-energize and Depressurize
Before removing any part of electrical, hydraulic, pneumatic, or foam systems ensure the system is not
energized or pressurized (e.g. disconnect batteries or relieve all pressure from air system by opening drain
valves). Ensure that all controls are in the OFF position before starting any removal procedure.
Study the task description before disassembling or removing any item. This reduces job time as all tools and
equipment will be available and procedures will have been noted.
Ensure there is sufficient clearance to remove or disassemble a particular part. Disassemble adjacent parts
as necessary to provide reasonable working clearance.
Use a hoist, jack, or other aid when lifting heavy parts. Lifting devices should be positioned and attached to
the part to remove all strain from mounting hardware before part is removed. Never work under a part which
is supported only by a lifting device. Always support that part on maintenance trestles or other supports
before starting work.
In certain cases it will be necessary to raise the truck so that all tires clear the ground. The following
procedure describes a safe method of lifting the truck.