4-20. REMOVE/INSTALL EXPLOSIVE PROOF DISTRIBUTION BOX A3
COMPONENTS - continued.
Remove two mounting screws, flat washers, and lockwashers attaching relay to relay mounting plate
and remove faulty relay.
Install Timer Relay A3K1. See figure 4-9.
The timer relay is replaced by simply aligning relay pins with socket and plugging the relay into the socket.
The procedures for replacing the remaining four control relays
are identical to those outlined in the following steps.
Install Control Relay. See figure 4-9.
Align new relay on mounting plate and attach with two screws, lockwashers, and flat washers.
Reconnect electrical leads and tighten terminal screws.
Assemble Explosive Proof Distribution Box A3. See figure 4-9.
Place cover on distribution box and fasten in place with twenty-eight mounting screws and flat washers.
Replace outside metal panel with six screws.
Close Main Circuit Breaker and turn generator ON.
Run operational test to verify new components.