Cab Tachometer Isolation Switch.
Remove nut (9) securing toggle switch (10) in ECV cab.
Tag and remove wires from toggle switch (10).
To prevent injury to personnel, always wear eye protection when drilling.
Make sure drill bit has a drill stop to prevent the drill bit from exceeding a depth of one inch.
Drill out two rivets (11) securing legend plate (12) to ECV cab.
Two personnel are required to install the switch. One person to hold the switch in position
from under the ECV, the other person to secure the nut from inside the ECV.
Attach wires to toggle switch (10). Remove tags from wires.
Secure toggle switch (10) to ECV cab with nut (9).
Secure legend plate (12) to ECV cab with two rivets (11) (Item 74, Appx E).