Quantcast Table III. Organizational Mechanics or Maintenance Crews C and D

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ices. Very often it will be found that a particular procedure
does not apply to both scheduled maintenances. In order to
determine
which
procedure
to
follow,
look
down
the
column
corresponding
to
the
maintenance
procedure,
and
wherever
an
item  appears,
perform
the
operations
indicated
opposite
the
number.
Table III. Organizational Mechanics or Maintenance Crews C and D
Preventive-Maintenance
Services.
INSPECTION AND ROAD TEST
Note. When the tactical situation does not permit a full road
test, perform only those items that require little or no movement of
the semitrailer. When a road test can be made, it should be
approximately 3 miles but not over 5 miles.
Before operation: Tires, general visual inspection of
semitrailer and equipment. Perform the before-opera-
tion service (par.43).
Air pressure. With breaking systems of towing vehicle
and semi trailer proper] y connected, inspect for leaks
in the semitrailer air brake system by stopping the
engine when the air pressure is at a maximum and
noticing if there is any appreciable drop on the air
pressure gage within 1 minute.
Brakes braking effect, feel, side pull, noise, chatter,
p e d a l travel, and hand control. Apply semitrailer
brakes alone and observe if they operate effectively.
Disconnect hose from towing vehicle and see if semi-
trailer. brakes apply.
Unusual  noises-attachments,  body,  and  wheels.  At all
times during the road test, be alert for unusual or
excessive noises that may indicate looseness, defects,
or dificient lubrication in these components.
Lamps-tail, clearance, stop, and blackout. During stops
in the road test, test the operation of these exterior
lights. Note condition of lights and safety reflectors.
AFTER ROAD TEST
T e m p e r a t u r e s - b r a k e drums, hubs. Immediately  after
the road test, feel these units cautiously. An overheated
wheel hub and brake drum indicates an improperly
adjusted, defective, or dry wheel bearing, or a drag-
ging brake. An abnormally cool condition indicates
an inoperative brake.
TAGO 1321B
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