McConnel PA7070T Operator's Manual page 58

With the dipper arm socket and telescopic dipper separated coat the inner surfaces of the
socket arm and outer surfaces of the tele arm with wax oil prior to re-assembly this will
serve to both protect and lubricate the arms - this procedure should be performed in a
clean and dry dust free environment to ensure the lubricated sliding surfaces of the arms
do not become contaminated by dirt, grit or moisture.
Prior to insertion of the tele dipper into the socket arm the 12 inner wear pads should be
assembled within the dipper arm socket – 6 are located midway within the arm and 6 are
located at the 'open' end of the arm, in both locations the pads are fitted in sets of 3's to
the both the lower and one side surface of the arm (when viewed from the 'open end' of
the arm these side surfaces will be to the right hand side on left hand machines and the
left hand side on right hand machines). Note: A few 'dabs' of grease placed on the backs
of inner wear pads will help to keep them in position during the assembly procedure.
The tele arm may now be inserted into the socket arm (care should be adopted to avoid
dislodging the inner wear pads), slide the tele arm into the socket to its furthest point.
Place the outer wear pads (8 in total) into their slots in the socket arm and fit the pusher
plates over the studs and retain 'loosely' in place with the first set of nuts.
Adjustment
When all pads and pusher plates have been located correctly tighten each set in a cross
sequence to a torque setting of 20 Nm. When they have all have been tightened they
should then be 'slackened back' by 1/2 a turn; the tele arm will now be held securely in
place but capable of being slid with a slight degree of effort. Assemble the second set of
nuts on the studs and evenly tighten them against the first set to a torque setting of 50 Nm.
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