Section V. FIELD EXPEDIENT REPAIRS
46. General
Organizational maintenance troubles may occur while the jaw crusher is operating in the field where supplies and
repair parts are not available and normal corrective action cannot be performed. When this condition exists, the
following expedient repairs may be used in emergencies, upon the decision of the unit commander. Equipment so
repaired must be removed from operation as soon as possible and properly repaired before being placed in operation
again.
47. Engine Stops or Runs Erratically
Trouble
Expedient remedy
Clogged fuel filter.................................. Removed clogged filter element (par. 67). Connect fuel lines together bypassing
filters.
48. Engine Overheats
Trouble
Expedient remedy
Defective thermostat ............................. Remove thermostat from housing (par. 107) and operate without thermostat.
49.
Conveyors Will Not Operate When Start Button is Depressed
Trouble
Expedient remedy
Defective START and STOP
Remove electrical wire from rear of defective push-button (par. 131) and
electrical motor pushbutton
contact wires direct, bypassing the button. Operate motors from the
control.
main electrical control panel until a new push- button can be obtained.
Section VI. RADIO INTERFERENCE SUPPRESSION
50. General Methods Used to Attain Proper Suppression
Essentially suppression is attained by providing a low resistance path to ground for stray currents. The methods used
include shielding the ignition and high-frequency wires, grounding the frame with bonding straps, and using capacitors
and resistors. For general information on radio interference suppression, see TM 11-483.
51. Interference Suppression Components
a.
Primary Suppression Components. The engine-to-frame bonding strap is illustrated on figure 9.
b.
Secondary Suppression Components.
(1)
Tooth-type lockwashers. Tooth-type lockwashers are used to assure a good metal-to-metal contact where
electrical components are mounted.
(2)
Shielded cable. The generator is equipped with a shielded cable connecting the generator and generator
regulator.
52. Replacement of Suppression Components
a. Primary Suppression Components. Replace the bonding strap (3, fig. 9) by removing the bolt (5), washers (6),
and nut (2) that secure it to the timing gear cover (1) and the engine frame (4). Install a new bonding strap and mounting
hardware. Be certain of a good metal-to-metal contact.
b.
Secondary Suppression Components.
(1)
Tooth-type lockwashers.
(a)
If proper suppression is to be obtained, it is necessary that a good metal-to-metal contact is obtained
by tightening the mounting hardware employing tooth-type lockwashers.
(b)
For replacement of tooth-type lockwashers, refer to paragraphs 83, 84, and 86.
(2)
Shielded cable. Replace the shielded generator-to-generator regulator cable (pars. 83 and 84).
53. Testing of Radio Interference Suppression Components
Test the capacitors for leaks and shorts on a capacitor tester; replace defective capacitors. If test equipment is not
available and interference is indicated, isolate the cause of interference by the trial and error method of replacing each
capacitor in turn until the cause of interference is located and eliminated.
AGO 8156A
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