T-SM5f Page 25 of 29
MR & MRS OPERATION TABLES
Fig. 18 Head section without gas spring
ii Remove the push button retaining screw from
the inside of the arm. Apply screw Loctite and
reassemble screw into push button.
iii Tighten the retaining screw until the washer on
the inside of the circlip just touches the side of
the casting with the setting tool in place.
iv Check the setting of the push button by sliding
the tool in and out slowly, it should be possible
to feel the push button rubbing on the gauge by
resting a finger lightly on the button and a slight
jump of the button will be felt when the gauge
contacts the button.
Replacing fine control handwheel (on head
section pre Serial No. MR 676 and MRS 1026)
4.53. Remove grub screw from handwheel
(1, Fig. 18), grip worm shaft (6, Fig. 18) then
remove handwheel. When fitting a new
handwheel, it is recommended that the grub screw
should also be renewed.
Replacing quick release bar on head and leg
sections without gas spring units (see Note in
4.23 for Serial Number detail)
4.54. Quick-release bar assembly consists of two
rack lift levers (2, Fig. 18) and the release bar
(3, Fig. 18). If it is only required to detach release
bar, simply remove two domed nuts (4, Fig. 18)
at each end of bar to free bar from rack lift levers.
4.55. If complete release bar assembly is to be
removed including rack lift levers (2, Fig. 18),
unscrew socket head screws (5, Fig 18) on either
side and ease lever pivots out of their slots.
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