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Replacing Modules
TB9400 Installation and Operation Manual
© Tait Limited March 2015
8.6
Replacing the Module Guide Rails
The module guide rails are held in place by four hooks that fit through the 
slots in the top and bottom of the subrack. There is also a locking tab which 
prevents the guide rails from working loose.
Notice Subracks produced from late 2008 onwards have wider slots 
than earlier subracks. Guide rails designed for these wider slots will not 
fit older subracks with narrow slots.
Removal
1.
Bottom Guide Rails
a. Insert a small flat-blade screwdriver under the front end of the 
guide rail and lift it slightly 
b
. This will ensure the small locking 
tab is clear of the slot in the subrack.
b. While holding the front end of the guide rail up, pull the guide rail 
towards the front of the subrack 
c
 and lift it clear of the slots.
2.
Top Rails
a. Insert a small flat-blade screwdriver under the rear end of the 
guide rail and lift it slightly 
d
. This will ensure the small locking 
tab is clear of the slot in the subrack.
b. While holding the rear end of the guide rail up, pull the guide rail 
towards the rear of the subrack 
e
 and lift it clear of the slots.
Refitting
1.
Bottom Guide Rails
a. With the locating hooks pointing towards the rear of the subrack, 
insert the hooks into the slots in the subrack.
b. Push the guide rail towards the rear of the subrack until you hear 
the locking tab “click” into place.
2.
Top Guide Rails
a. With the locating hooks pointing towards the front of the subrack, 
insert the hooks into the slots in the subrack.
b. Push the guide rail towards the front of the subrack until you hear 
the locking tab “click” into place.
bottom guide rail
top guide rail
b
c
d
e