(2) Push engine start buttons.
Nothing
done, engine oil and water temperatures
happens.
(maximum and average), lubricating oil
pressure (idling and full speed), trailing
(3) Move REVERSE lever to ENGINE ONLY.
load and engine-cylinder temperatures if
(4) Push No. 1 start button.
pyrometers are installed, etc.
(a) G1 closes.
(3) These reports are valuable and each item
(b) BP opens.
will be followed up by the maintainer and
(c) BS closes.
the trouble remedied immediately.
(d) G closes.
Abnormal variations in engine-water and
oil temperatures, quantities of oil used,
(5) Release No. 1 start button.
engine noises, exhaust pipes overheating,
(a) G1 opens.
excess current, flashover, etc., will be
(b) BS opens.
investigated at once.
(c) G opens.
(4) Successful
operation
of
internal
(d) 13P closes
combustion engine equipments depends,
(6) Repeat (4) and (5) using No. 2 start
to a great extent, upon immediate
button and G2 in place of G1.
correction of little troubles. If this is done,
(7) Move REVERSE lever to FOR and REV
the overall expense for maintenance will
and push start buttons in each position
be low.
and note that nothing happens.
b. Inspection Schedule.
(8) Push relay BP1 closed and release. BP
(1) Inspection work sheets for use in
opens and holding coil holds BP1 closed.
connection
with
inspection
and
(9) Open battery switch. Relay BP1 opens
maintenance of Department of the Army
and BP closes.
diesel locomotives will be prepared on the
appropriate DD Form 862, DD Form 863,
(10) Repeat (8) and (9) using BP2 instead of
and DD Form 864.
BP1. Other sequence remains the same.
(2) These forms outline procedural steps to
c. Main Circuit Sequence Check.
be followed in the daily, monthly,
quarterly,
semiannual
and
annual
Caution
inspection of the locomotive. By their
In some of the tests following, it is
use, a progressive program of preventive
required to push relays closed. Do
maintenance is accomplished.
not touch the apparatus with the
(3) Correct any defects observed during
hands, but use a piece of wood or
operation at the inspection period; when
other insulating material.
required, make correction at the time of
failure.
(1) Move reverse handle to FORWARD and
move throttle handle to No. 1 notch.
50. Sequence Test of Control Equipment
Reverser throws to FORWARD. P1, P2,
In order to test for the correct functioning of each
P3, P4, BF1 and BF2 close. The throttle
switch contactor and relay, and to determine if the
operator does not operate.
operation of each unit is in proper sequence with the
(2) Move throttle handle to No. 2 notch. TH3
other units, refer to figure 44 and proceed as follows:
and TH23 operate.
a. Preliminary.
(3) Move handle to No. 3 notch. TH1 and
(1) Insulate the main contacts of the G
TH21 operate; TH3 and TH23 return to
switch.
normal. BF1 opens.
(2) With engine dead, close the battery
(4) Move handle to No. 4 notch. TH1 and
switch.
TH21, TH3 and TH23 operate.
(3) Charge the air system and see that air is
(5) Move handle to No. 5 notch. TH2 and
furnished to the pneumatic apparatus.
TH22, T113 and TH23 operate. TH1 and
(4) Place the reverse handle of the controller
TH21 return to normal. BF2 opens.
in OFF and the throttle handle in OFF.
(6) Move handle to No. 6 notch. TH1 and
b. Starting Circuit Sequence Check.
TH21, TH2 and TH22 operate. TH3 and
(1) Close the control circuit breaker.
TH23 return to normal.
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