Type B Vital Relays - Alstom

Corrective Maintenance
6.4.3. Insulator Removal and Installation
To remove and replace an insulator, follow the steps in Table 6–7 in the order provided.
Table 6–7. Insulator Removal and Installation Procedure
Step
Procedure
1 From the rear of the plugboard, squeeze the locking tab toward the insulator
and push the insulator forward.
LOCKING
TAB
SQUEEZE
TOWARD
INSULATOR
2 Remove the insulator from the front of the plugboard.
3 From the front of the plugboard, insert the new insulator end with the locking tab
first. Push until the insulator is seated and the locking tab engages. The locking
tab clicks when it engages.
4 From the front of the plugboard, tug on the insulator to verify that the locking tab
has engaged.
P1457, Rev. Nov/07 6–10 Alstom Signaling Inc.