12 - 15mm
ConnectingLink
and springclip
Linkage rod
Locknut
Turnbuckle
Link pin
Sprocket
Spiral pin
68mm approx.
3.23 DOOR WINDOW (G7204 and 7208 ONLY)
a) Remove door as described in Section 3.21.
b) Remove all fixings on top and bottom flanges of
door plus those which secure sealingstrip down
side flange.
c) Lay door down on outer surface and prise inner
liningout. The door window assembly may now be
removed.
d) When replacing only one single glass panel,
dismantle frame by removingall fixings around
periphery of window assembly.
e) Replace glass and sealing strip if necessary.
Carefully re-assemble window structure.
f) Re-fit all the door components in reverse order.
3.24 DOOR LINKAGE SPROCKET
a) Remove door as Section 3.2.1.
b) Slacken turnbuckles to allow chain to be slipped off
sprocket.
c) Push out roll pin which holds sprocket to lower
hinge pin. Remove pin securing door switch cam if
right sprocket is being replaced.
d) Pull up lower hinge pin and remove sprocket.
e) Replace in reverse order. Refer to door linkage
adjustment section for alignment and tensioning of
components.
Figure 2
Figure 3
3.25 DOOR LINKAGE CHAIN and ROD
a) Remove bottom front panel as Section 3.2.1.
b) Slacken turnbuckle to remove tension from chains.
c) Remove springclip from link which joins chain to
turnbuckle. Push out link and withdraw chain and
rod assembly.
d) Replace in reverse order. Refer to door linkage
adjustment section, door linkage alignment
sections and Figures 2 and 3.
3.26 DOOR LINKAGE ADJUSTMENT
and TENSIONING
Due to operational stretchingof components or
removal for maintenance, occasions will arise when
doors linkage mechanism will require adjustment.
The method to use is as follows:
Push door handle until RH door makes contact with
seal. LH door should now be 12 to 15mm proud of
RH door at vertical join - see Figure 2. If LH door
distance is less than this dimension, slacken both
turnbuckle locknuts and rotate left turnbuckle to
reduce length on rod and right turnbuckle to increase
length on rod by same amount.
Repeat procedure until desired dimension is
achieved.
If left door distance is greater than desired setting
then the above procedure should be carried out in
reverse.
After doors are synchronised, the linkage should be
put under tension by slightly twisting the turnbuckles
toward one other by the same small amount.
The tension should be such that no free play is
available between chains and sprockets.
3.27 DOOR LINKAGE ALIGNMENT
When linkage components have been disturbed
duringrepair, the initial coarse alig
nment of the
assembly will be achieved by positioningthe chains
on their sprockets as indicated in Figure 3. The doors
should be in the closed position whilst carryingout
this operation.
