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Maintenance Section
Illustration 200 g00858059
7. Extend the boom and lower the work tool to the
ground. Lower the boom to the ground and fully
extend the boom. Check the temperature of the
top surfaces of number 1 boom section and
number 2 boom section. Check the temperature of
the wear pads at opposite locations at positions (A)
and at positions (B). Both sides of each section
should feel the same temperature. If necessary,
increase the thickness of the shims under the rear
wear pad which is in contact with the cool side of
the boom section. Alternatively, decrease the
thickness of the shims under the front wear pad
which is in contact with the hot side of the boom
section.
8. Install the cover on the rear of the boom.
Boom and Frame - Inspect
In order to help minimize unexpected, costly repairs
and downtime, inspections need to be carried out on a
regular basis. The interval between the inspections
depends on factors. These factors are the age of the
machine, the severity of the application, loading, routine
servicing which has been carried out on the machine
and the operating conditions.
More frequent inspections will be required of older
machines and machines that are used in particularly
severe applications.
If the machine has been involved in any kind of
accident the machine must be taken out of service
immediately. The machine must be inspected again.
To perform a proper inspection, the machine must be
thoroughly cleaned. It is impossible to inspect the
machine properly if the machine is dirty.
Early detection and repair of faults will ensure
continued operation of the machine. Also, early
detection and repair will improve the availability of the
machine. Repair of faults will also reduce the risk of
accidents.
The machine should only be repaired by a qualified
Caterpillar dealer. However, if you decide to carry out
your own repairs, consult your Caterpillar dealer for the
recommended repair techniques.
Illustration 201 g0 08619 01
Main frame and support cradle
Retract the boom and raise the boom away from the
main frame and support cradle (1). Support the boom
with a suitable stand. To properly support the boom,
use the following tools:
Table 21
Inspect the complete main frame and the support
cradle. Inspect the main frame and the support cradle
particularly in welded structures.
Pay particular attention to the mounting points for the
following parts:
•Boom
•Cab
•Axles
•Engine
•Transmission
• Towing attachment (if equipped)
• Mountings on the frame
• Stabilizers (if equipped)
• Tie down lugs
Required Tools
Part Number Description Quantity
8S-7641 Tube 1
4C-6486 Stand 1
8S-7615 Pin 1
8S-7625 Collar 1
8S-8048 Saddle 1