Installation; Arm Installation Procedure; Boom Installation Procedure; Start-Up Procedures - Doosan DX140R Shop Manual

INSTALLATION

Arm Installation Procedure

Reattach the base of the arm cylinder to the mounting point on
top of the boom.
WARNING
Before assembling the front attachment, make sure that the
individual boom, arm and bucket sections are all
compatible and can be used safely for work intended. Refer
to the General Safety Pages, Lift Ratings, Working Range
Diagrams and Weights of Materials sections in the
Operation and Maintenance Manual. Consult your dealer or
DOOSAN After Sales Service for more information if you
have any questions or require more information.
Begin with the arm securely supported on blocking in front of the
excavator. Pregrease the mounting pin for the rod end of the
arm cylinder and push it through the ears on the end of the arm.
Attach a sling around that mounting pin and lift the arm with an
assist crane until it is in position for the boom-arm pin
connection to be made.
Relieve hydraulic pressure from all points of the system before
any hydraulic lines are opened, then carefully assemble
hydraulic connections to the arm cylinder.
Remove the sling from around the rod end arm cylinder pin,
withdraw the pin and lift the body of the arm cylinder to re-pin the
mounting connection.

Boom Installation Procedure

Before reassembling the attachment, make sure to inspect all
bushings and pivot points of each section. To avoid damaging
the seats, bushings should never be hammered or chiseled out
of their seats.
Installation is otherwise a reversal of the removal procedures.

START-UP PROCEDURES

Once the boom has been serviced, it should be lubricated as
outlined in the initial start-up procedures of the operation
manual. Refer to the appropriate operation and maintenance
manual for unit.
SP002378
Boom and Arm
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