Centurion CP71, Installation Manual

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9.0 COMMISSIONING
9.1 - Before any commissioning is done it is important to make sure that
the counter balancing spring is providing a force to balance the
weight of the arm.
Adjust the spring tension to suit the length of of arm. This can be done
by loosening the nuts on the spring tensioner and adjusting the length.
Also make sure the boom coupler and crank arm
are displaced by +/- 150 deg., NOT +/- 45 deg.
BOOM COUPLER
NOTE: ARM IS FULLY RAISED
("UP ") AND COUNTER
BALANCE SPRING IS
FULLY RETRACTED.
CORRECT FOR
ORIENTATION 2
CRANK
ARM
END VIEWS FROM CRANK END
NOT NOT
WRONG !!
CORRECT FOR
ORIENTATION 4
45
45
150
150
ADJUST LENGTH
OF TENSIONER PIN
TO SUIT ARM LENGTH