(2) Installation. Install OIL PRESSURE gage
(78) using removal steps in reverse order.
3-122. Fuel Level Gage.
See (79, fig. 3-18) and proceed as follows:
a. Testing.
(1) Gain access to the rear of the cubicle
control panel (96).
CAUTION
Connect battery negative terminal
prior to checking the gage read-
ings.
Remove this terminal prior
to making circuit changes.
(2) Tag and remove the lead from FUEL
LEVEL gage (79). Check that START-RUN-STOP
switch is set to RUN. BATTLE SHORT switch to
ON, and that DC CONTROL CIRCUIT BREAKER
is in closed (on) position. Apply ground (0 ohms)
to SEND terminal of the gage. Gage should read
EMPTY.
(3) The 0-500 ohm FREQUENCY ADJUST
rheostat can be used to check the FUEL LEVEL
gage. Discomect and tag all leads from the
FREQUENCY ADJUST rheostat.
(4) Connect a multimeter between the wiper
arm terminal and either other terminal of the
rheostat and adjust the FREQUENCY ADJUST-
MENT rheostat until the multimeter reads 30
ohms. Disconnect the multimeter but do not
disturb rheostat setting.
(5) Check that START-RUN-STOP switch is
set to RUN, BATTLE SHORT switch to ON, and
that DC CONTROL CIRCUIT BREAKER is in closed
(on) position.
Connect the 30 ohm resistance of the
FREQUENCY ADJUST rheostat in series with
ground to the SEND terminal of the FUEL LEVEL
gage. FUEL LEVEL gage should read FULL.
(6) Disconnect FREQUENCY ADJUST
rheostat from circuit and reconnect leads
removed in paragraph (3) above.
(7) If the FUEL LEVEL gage does not operate
correctly, replace it.
b . Replacement.
Replace the FUEL LEVEL
gage (79) as follows:
(1) Removal.
(a) Gain access to the rear of the control
cubicle panel (96).
(b) Tag and remove the leads from FUEL
LEVEL gage.
(c) Remove the two nuts, two washers, and
clamp which secure the FUEL LEVEL gage and re-
move gage.
(2) Installation. Install FUEL LEVEL gage
(79) using removal steps in reverse order. Remove
tags.
3-123. Running Time Meter.
See (74, fig. 3-18) and proceed as follows:
a . Testing.
Check that START-RUN-STOP switch
is set to RUN, BATTLE SHORT switch to ON, and
that DC CONTROL CIRCUfT BREAKER is in closed
(on) position. RUNNING TIME meter should operate
and change by one-tenth of an hour. Check for 24
Vdc input to meter. If voltage is present and the
meter does not operate, replace it.
b. Replacement.
Replace RUNNING TIME
meter(74)
as follows:
(1) Removal.
(a) Gain access to the rear of the control
cubicle panel (96).
(b) Tag and remove the leads from tne
RUNNING TIME meter.
(c) Remove the three screws (72) and nuts
(73) which secure the RUNNING TIME meter (74)
and remove meter.
(2) Installation.
Install RUNNING TIME
meter (74) using removal steps in reverse order.
Remove tags.
3-124. Battery Charging Ammeter.
See (77, fig. 3-18) and proceed as follows:
a. Testing.
(1) Gain access to the rear of the control
cubicle panel (96).
CAUTION
Disconnect battery negative terminal prior
to checking the indicator readings or
making circuit changes.
(2) Set VOLTMETER to R Xl scale and connect
across terminals of BATTERY CHG AMMEtER (77).
Reading on voltmeter should be zero and BATTERY
CHG AMMETER should indicate a charge or discharge
reading.
If voltmeter does not read zero, replace
BATTERY CHG AMMETER.
b. Replacement. Replace
AMMETER (77) as follows
(1) Removal.
the BATTERY CHG
(a) Gain access to the rear of the control
cubicle panel (96).
3-45