Table 3-3. Troubleshooting-Continued
Malfunction Probable cause
Corrective action
33. Heaters do not keep burning-----
a.
Burner dirty--------------------------------
a.
Clean burner (paras 4-43, 4-44 and 4-45).
b.
Fuel strainer clogged-------------------
b.
Service (para 3-25).
c.
Defective fuel pump---------------------
c.
Replace (para 4-46).
d.
Defective limit switch--------------------
d.
Replace (paras 4-43, 4-44, and 4-45).
Section VI. FIELD EXPEDIENT REPAIRS
3-49. Engine Starved for Fuel
3-46. General
Organizational maintenance troubles may occur while
Trouble
Expedient remedy
the crane-shovel is operating in the field where supplies
Clogged filter element ............. Remove filter element para
and repair parts are not available and corrective action
cannot be performed. When this condition exists, the
until one is received.
following expedient repairs may be used in emergencies
Defective fuel filter .................. Remove fuel filter (para 3-74 or
upon the decision of the unit commander. Equipment
and operate without until one is
so repaired must be removed from operation as soon as
received.
possible and properly repaired before being placed in
service again.
3-50. Low Engine Oil Pressure
3-47. Starter Motor Fails to Turn Engine
Trouble
Expedient remedy
Clogged filter element ............. Remove oil filter element (para
Trouble
Expedient remedy
Dead batteries ........................ Use jumper cables from other
until one is received.
batteries or another piece
of equipment to supply
3-51. Engine Oil Strainer Faulty
current for starting engine.
3-48. Engine Overheats
Trouble
Expedient remedy
Clogged or defective filter........ Remove filter element
Trouble
Expedient remedy
element.
Defective thermostat ............... Remove thermostat (para
strainer and use without
until one is received.
without until one is
received.
Section VII. RADIO INTERFERENCE SUPPRESSION
b. Secondary Suppression Components.
The
3-52. General Methods Used to Attain Proper
secondary suppression have radio interference
Suppression
suppression functions which are incidental of secondary
Essentially, suppression is attained by providing a low
to their primary function.
resistance path to ground for the stray currents. The
methods used include shielding the ignition and high-
3-54. Replacement of Suppression Components
straps, and using capacitors and resistors.
a. General.
Replacement of suppression com-
ponents requires positive metal-to-metal contact with
3-53. Interference Suppression Components
washers and ground straps. Replace as follows:
b. Generator Ground Strap.
a. Primary Suppression Components. The primary
(1)Remove capscrew (fig. 3-41) and ET washer that
suppression components are those whose primary
secures ground strap to engine.
function is to suppress radio interference.
These
(2)Remove capscrew and ET washer that secures
components are described and located in figure 3-41
ground strap to generator, and remove ground strap.
3-50
