Lesson 4/Learning Event 2
control panel from the back. Install the bezel on the gage from the front
of the control panel.
Install the screws, spacers, washers, and nuts to
fasten the gage to the panel.
Connect the tubing and pipe nipple to the
elbow.
Pressure gage. Disconnect the tubing from the elbow and pipe nipple at the
base of the gage on the back of the control panel.
Remove the nuts,
washers, spacers, and screws that fasten the gage to the panel. Remove the
bezel from the front of the control panel. Remove the gage from the back of
the control panel and remove the elbow from the gage. Connect the elbow to
the new gage and position the new gage in the control panel from the back.
Install the bezel on the gage from the front of the control panel. Install
the screws, spacers, washers, and nuts to fasten the gage to the panel.
Connect the tubing and pipe nipple to the elbow.
Tachometer-hourmeter. Unscrew the end of the flexible shaft from the back
of the tachometer-hourmeter.
Remove the nuts and lockwashers that fasten
the tachometer-hourmeter to the mounting bracket.
Remove the tachometer-
hourmeter from the front of the control panel.
Install the tachometer-
hourmeter through the front of the control panel. Install the lockwashers
and nuts to fasten the tachometer-hourmeter to the mounting bracket.
Install the flexible shaft key in the back of the tachometer-hourmeter and
tighten the nut.
NOTE
When replacing the tachometer-hourmeter, record the hours
operated and serial number in the equipment logbook (TM
38-750). Record the new instrument reading and serial number in
the equipment logbook.
Start-magneto switch.
Disconnect and tag the wires from the back of the
start-magneto switch.
From the front of the control panel, remove the
screw, bushing, and control knob from the switch stem. Withdraw the switch
from the back of the control panel. Position the stem end of the new switch
in the control panel. Install the bushing, knob, and screw on the switch
stem from the front of the control panel. Connect the tagged wires to the
rear of the switch.
Terminal board.
Disconnect and tag the wires from the terminals.
Remove
the four screws, washers, and nuts that fasten the terminal board to the
back of the control panel and remove the terminal board. Position the new
terminal board against the back of the control panel and install the four
screws, washers, and nuts to fasten the board to the panel.
Connect the
tagged wires to the terminals on the terminal board.
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