26
9. Maintenance
Re-Assembling the SC3
Important: When re-fitting the jaw slides, do
so in numerical ascending order in an anti-
clockwise direction.
Refit the jaw slides. They must be re-fitted in an anti-
clockwise direction in order for the scroll gear to register
correctly with the jaw slides. The slides do not have a
corresponding socket on the chuck body, so any socket
can be used to start from.
Before re-fitting the scroll gear, ensure the jaws are
symmetrically positioned as far inwards as possible as
shown in Fig 9.4.
With the chuck positioned face down, place the scroll
gear back into the chuck body and twist from side to side
until it drops into position, Fig 9.5.
To check that the scroll gear has registered correctly
with the jaw slides, move the scroll gear by hand whilst
applying downwards pressure to it to observe the
movement of the jaw slides. If additional pressure is
required to move the jaw slides, hold the scroll gear in
position by hand and turn it using the chuck key, Fig 9.6.
Once the scroll gear is positioned correctly, check that
the jaw slides are still positioned symmetrically then refit
the circlip.
Fig 9.4
Fig 9.5
Fig 9.6
SC3 & SC4 Manual 3.7.indd 26SC3 & SC4 Manual 3.7.indd 26 22/04/2022 13:06:0422/04/2022 13:06:04
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